Racing & Performance
Complex CNC Uprights & Mounts
Bearing fits, angled mounting lugs and multi-face interfaces.
CNC milling + turningAUTOMOTIVE PARTS MANUFACTURING
Custom Automotive Parts.
Built to Your Drawings.
Precision CNC machining, multi-process manufacturing and engineering support from prototypes to repeat production.
- DFM review and cost comparison
- Sample-to-production quality planning
- Texas warehouse and U.S. delivery options
Get an Engineer-Reviewed Quote
Privacy & file handling
LK MFG uses the contact and project details you submit to review and respond to your request. Drawings are stored privately. If you need confidentiality terms first, choose Request NDA before sending drawings.
ISO 9001:2015 Quality SystemDongguan ManufacturingTexas WarehouseDDP to the U.S.Engineering Support
FOR YOUR AUTOMOTIVE AFTERMARKET PROGRAM
Custom Parts for Your Automotive Program
Find the part family that matches your project. Review material, fit, finish and quantities with our team before ordering.
Request a Quote for Similar Parts
Trucks, SUVs & Off-Road
Formed Brackets & Protective Panels
Folded sheet, welded reinforcement and mounting slots.
Laser cutting + bending + joining
Powersports, SxS & Lifestyle
UTV Accessory Mounting Hardware
Tube clamps, mounting plates and accessory interfaces.
Machining + fabrication
Mobile Electronics & Technology
Custom Automotive Electronics Enclosures
Molded bosses, covers and assembly interfaces.
Injection molding
Racing & Performance
CNC Fuel Rail Bodies
Injector ports, sealing bores and threaded connections.
CNC milling + turning
Truck & Off-Road
Off-Road Clevis Mounts
Pivot-bore alignment, mounting faces and finish.
CNC milling + turning
UTV / SxS
UTV Pivot Link Concepts
Mating bores, sleeves and fastener interfaces.
CNC milling + turning
Automotive Electronics
Controller Housing Concepts
Heat paths, sealing faces and connector openings.
Casting + secondary machiningIllustrative part concepts.
Manufacturing Services for Your Parts
CNC Machining
Review critical bores, threads and mating faces for milled and turned parts.
Die Casting
Review draft, wall thickness, parting lines, tooling and secondary machining.
Sheet Metal Fabrication
Review bends, joining, hole locations and tolerance at formed interfaces.
Injection Molding
Review resin grade, draft, inserts, tooling and surface requirements.
Materials
Metals
Review aluminum, steel, stainless steel and casting alloys against loads, environment and drawing requirements.
Engineering plastics
Specify the resin grade, reinforcement, temperature and exposure conditions.
Surface Finishing
Anodizing & conversion coating
Agree thickness, masking, fit and cosmetic criteria.
Powder coating & plating
Confirm coverage, appearance, corrosion requirements and fit allowances.
START WITH YOUR MANUFACTURING PRIORITY
Review the Details That Matter to Your Part
Select a topic. Define your inputs, checks and next approval.
For Your Thread Fit & Assembly
Specify thread class, mating parts and functional checks before sample approval.
Define Your Review Inputs
Review the controlled thread callout, gauge method, mating hardware and coating allowance together.
Agree Your Approval Criteria
Specify thread class, mating parts and functional checks before sample approval.
Review the controlled thread callout, gauge method, mating hardware and coating allowance together.
Plan Your Next Step
Review the controlled thread callout, gauge method, mating hardware and coating allowance together.
Thread & Fit
Confirm the thread class, pitch and mating hardware.
Inspection Method
Agree GO/NO-GO gauges and functional-fit checks.
Drawing Revision
Use the controlled drawing and critical callouts.
Sample Approval
Resolve fit and coating allowance before release.
Requirements and inspection scope are agreed for your project.
For Your Color & Texture
Approve a physical color and texture sample; define masking on fits and threads.
Define Your Review Inputs
Agree gloss, texture, masking and approved sample references before repeat production.
Agree Your Approval Criteria
Approve a physical color and texture sample; define masking on fits and threads.
Agree gloss, texture, masking and approved sample references before repeat production.
Plan Your Next Step
Agree gloss, texture, masking and approved sample references before repeat production.
Color Reference
Specify a physical sample, RAL or Pantone reference.
Gloss & Texture
Agree finish texture, gloss and process requirements.
Cosmetic Zones
Identify visible faces and areas to mask.
Limit Sample
Agree the visual acceptance range and reference sample.
Requirements and inspection scope are agreed for your project.
For Your DFM & Sample Rework
Resolve tool access, thin walls and drawing questions before repeat revisions.
Define Your Review Inputs
Review critical features and process alternatives. Separate required drawing changes from optional cost improvements.
Agree Your Approval Criteria
Resolve tool access, thin walls and drawing questions before repeat revisions.
Review critical features and process alternatives. Separate required drawing changes from optional cost improvements.
Plan Your Next Step
Review critical features and process alternatives. Separate required drawing changes from optional cost improvements.
Tool Access
Review cutter reach, internal corners and setup access.
Critical Fits
Identify mating features, clearances and tolerances.
Revision Control
Record drawing changes and their cost or timing impact.
Rework Approval
Agree modification scope before another sample build.
Requirements and inspection scope are agreed for your project.
For Your Sample & Lead-Time Planning
Separate prototype, tooling and production milestones; confirm timing after review.
Define Your Review Inputs
Identify who approves the sample, what must be checked and which milestones depend on that approval.
Agree Your Approval Criteria
Separate prototype, tooling and production milestones; confirm timing after review.
Identify who approves the sample, what must be checked and which milestones depend on that approval.
Plan Your Next Step
Identify who approves the sample, what must be checked and which milestones depend on that approval.
Prototype Quantity
Define sample quantity, material and build route.
Sample Review
Set the approval checkpoint and required tests.
Production Window
Confirm capacity and timing after drawing review.
Shipment Milestones
Agree release dates, destination and dependencies.
Requirements and inspection scope are agreed for your project.
For Your Repeat Quality
Agree first-article features, inspection methods and revision-controlled records.
Define Your Review Inputs
List critical dimensions and required reports. Agree the sampling plan and handling of nonconforming parts.
Agree Your Approval Criteria
Agree first-article features, inspection methods and revision-controlled records.
List critical dimensions and required reports. Agree the sampling plan and handling of nonconforming parts.
Plan Your Next Step
List critical dimensions and required reports. Agree the sampling plan and handling of nonconforming parts.
Approved Revision
Use the agreed drawing for repeat production.
Inspection Plan
Define critical dimensions, frequency and methods.
Lot Traceability
Identify production lots and required records.
Change Control
Review material or process updates before release.
Requirements and inspection scope are agreed for your project.
For Your Packaging & Labels
Define surface protection, part separation, quantities and identification.
Define Your Review Inputs
Confirm separators, corrosion protection where needed, part orientation, package quantities and label fields.
Agree Your Approval Criteria
Define surface protection, part separation, quantities and identification.
Confirm separators, corrosion protection where needed, part orientation, package quantities and label fields.
Plan Your Next Step
Confirm separators, corrosion protection where needed, part orientation, package quantities and label fields.
Part Protection
Protect cosmetic faces, threads and critical fits.
Part Identification
Confirm part number, revision and customer labels.
Carton Configuration
Agree units per carton, dividers and pallet needs.
Receiving Records
Match labels, quantities and packing-list details.
Requirements and inspection scope are agreed for your project.
For Your Duties & Landed Cost
Review quoted scope, duties, freight and delivery terms for your destination.
Define Your Review Inputs
Confirm trade terms and importer responsibilities. Avoid comparing a factory-only price with a delivered quotation.
Agree Your Approval Criteria
Review quoted scope, duties, freight and delivery terms for your destination.
Confirm trade terms and importer responsibilities. Avoid comparing a factory-only price with a delivered quotation.
Plan Your Next Step
Confirm trade terms and importer responsibilities. Avoid comparing a factory-only price with a delivered quotation.
Incoterms
Confirm the named place and responsibility split.
Freight Method
Compare air, sea or express on the same scope.
Duty Basis
Confirm classification, origin and applicable duties.
Delivery Address
Agree final destination and any Texas stock release.
Requirements and inspection scope are agreed for your project.
For Your Payment & Follow-Up
Confirm payment milestones and how to report, document and resolve a part issue.
Define Your Review Inputs
Agree sample and tooling payment milestones, issue reporting inputs and the point of contact for follow-up.
Agree Your Approval Criteria
Confirm payment milestones and how to report, document and resolve a part issue.
Agree sample and tooling payment milestones, issue reporting inputs and the point of contact for follow-up.
Plan Your Next Step
Agree sample and tooling payment milestones, issue reporting inputs and the point of contact for follow-up.
Payment Terms
Agree sample, tooling and production milestones.
PO & Revision
Match the purchase order to the approved drawing.
Project Updates
Set the contact and progress checkpoints.
Issue Follow-Up
Record photos, affected lots and agreed next actions.
Requirements and inspection scope are agreed for your project.
Manufacturing scenes are illustrative. Actual project requirements and records are agreed separately.
Agree Your Evidence Before Production
For your sample approval: agree which fit, finish, dimensional and packaging records you need. The scenes below illustrate those review topics; actual project records follow the agreed inspection scope.
Thread Gauging & Assembly Review
Powder-Coat Finish Samples
CMM Inspection Planning
Protective Packaging & Labeling
Illustrations — not actual test results, inspection reports or documentary company evidence.
YOUR SUPPLY CHAIN. YOUR NEXT STEP.
How We Work With Your Supply Chain
Keep your existing suppliers. Choose the support your project needs.
01
Overflow Capacity
Add capacity for selected parts when your current supplier is fully booked.
02
Qualified Second Source
Qualify an additional supplier against your drawing and sample requirements.
03
Texas Stock & Scheduled Releases
Agree Texas inventory quantities and staged releases for eligible programs.
From Your Drawing to Scheduled Delivery
- 1
Share Your Drawing
Send CAD, material, quantity, finish and critical requirements.
- 2
DFM & Quote
Review process options, assumptions and your manufacturing quote.
- 3
Sample & Quality Approval
Approve fit, finish, function and required records.
- 4
Scheduled Delivery
Confirm production, packaging and release arrangements.
Project Requirements & Cost Comparison
Define your specification, compare the quoted scope and prepare your RFQ in one place.
Material & finishRequired recordsDelivery scope
YOUR MATERIAL. YOUR FINISH. YOUR ACCEPTANCE RECORDS.
Material & Documentation Requirements
Define the grade, coating and evidence your buyer needs before the quote is agreed.
Compare the Same Material Condition
Typical uncoated rod-and-bar reference values—not LK MFG test results or acceptance limits.
| Alloy & temper | Brinell hardness | Yield strength | Tensile strength |
|---|---|---|---|
| 6061-T6 / T651 | 95 HB | 276 MPa | 310 MPa |
| 2024-T4 / T351 | 120 HB | 324 MPa | 469 MPa |
| 7075-T6 / T651 | 150 HB | 503 MPa | 572 MPa |
Kaiser Aluminum typical data: 0.500-inch tensile specimen; Brinell 500 kg / 10 mm ball. Product form, section, temper and test method matter. Confirm the ordered material specification and heat/lot certificate. Do not treat HB, HRC, HV or Shore D as interchangeable.
Other material families: what should your drawing define?
304 / 316 stainlessGrade, product form, delivery condition and corrosion environment.
4140 alloy steelHeat-treatment condition, hardness scale/range and test location.
POM / PA / PC / ABSExact resin grade, reinforcement, moisture conditioning, temperature and chemical exposure.
Specify Thickness Before You Approve the Fit
A finish name alone does not define the final dimensions, wear behavior or appearance.
Conventional Anodizing
≈ 2.5–25 µmPublished process reference range. Agree color, sealing, thickness tolerance and cosmetic sample.
Hardcoat Anodizing
≈ 25–127 µmAAC general reference range. Define wear needs, alloy, sealing, masking and final mating dimensions.
Chemical Conversion
Type + ClassClass 1A: corrosion protection. Class 3: low electrical contact resistance. Specify chemistry type and required tests.
These are published process reference envelopes, not MIL acceptance limits or a promised LK MFG range; they overlap and depend on alloy/process. Your drawing and agreed specification govern. MIL-PRF-8625 is the current designation of the former MIL-A-8625. MIL-DTL-5541 is chemical conversion, not hard anodizing.
| Finish | Define in your RFQ | Evidence to agree |
|---|---|---|
| Anodize / hardcoat | Specification revision, type/class, µm, sealing and masking | Thickness locations, appearance sample and required tests |
| Powder coating | Coating system, dry-film thickness, color, gloss and texture | Approved sample and specified adhesion/corrosion testing |
| Plating / passivation | Substrate, exact process, specification and local thickness where applicable | Processor record and the tests required by your drawing |
For your bores, threads and press fits: state whether dimensions apply before or after finishing. Coating growth is process-dependent; agree allowances with the processor rather than assuming one fixed ratio.
Choose a Resin Grade, Not Just “Fire-Retardant Plastic”
Specify the recognized grade, tested thickness and color for your enclosure.
UL 94 HB
Horizontal burning classification. It is not equivalent to a vertical V rating.
UL 94 V-2 · V-1 · V-0
Vertical classifications consider extinguishing time and flaming drips. Request the exact rating at your specified thickness.
UL 94 5VB · 5VA
More severe flame exposure. Do not substitute ratings across test methods or assume whole-product certification.
| Published grade example | Test thickness | UL 94 classification |
|---|---|---|
| Covestro Bayblend FR3010 · PC/ABS | 1.5 mm | V-0 |
| Same named grade | 2.0 mm | 5VB |
| Same named grade | 3.0 mm | 5VA |
Manufacturer-published grade example only—not a stocked-resin promise or certification of your part. Confirm the current recognition, approved color and thickness; different test methods are not interchangeable.
Your resin requirement: manufacturer + exact grade + reinforcement + color + minimum wall thickness + UL recognition record. An ABS, PC/ABS or PA family name does not guarantee V-0. UL 94 is a small-scale material flammability classification, not a “fireproof” claim.
Agree Your Report Package Before Production
Tell us which records your buyer requires. Availability, scope, timing and any testing cost must be confirmed in the quotation.
FAI / FAIR
First-article dimensional results against the controlled drawing, revision and numbered characteristics. Request AS9102 format only when contractually required and agreed.
CoC / Certificate of Conformity
Identify the part, revision, order and delivered lot, with an authorized conformity statement. A CoC does not replace measured results or material test data.
MTR / Material Certificate
Material grade, condition, heat/lot traceability and the chemistry/mechanical results required by the order. State EN 10204 3.1 explicitly if needed.
Finish & Test Records
Process specification/revision, processor and batch, with thickness, hardness or other results only for the agreed tests and locations.
PPAP Package
Agree the customer-specific submission level, elements and PSW before the production run. The package may include process flow, PFMEA, control plan, MSA and capability studies as required.
Resin & Lot Traceability
Confirm the resin grade, color, lot record and applicable UL recognition. A supplier datasheet is not a test report for your molded part.
FAI, CoC, material certificates and PPAP serve different purposes. This is a requirements menu, not a claim that every package is included or every program is approved. Customer approval and acceptance remain separate steps.
Keep Process Standards and Company Certification Separate
Use the exact designation and revision required by your contract.
| Reference | What it addresses | Confirm for your project |
|---|---|---|
| MIL-PRF-8625 | Anodic coatings on aluminum; formerly MIL-A-8625 | Type, class, thickness, sealing and testing |
| MIL-DTL-5541 | Aluminum chemical conversion coatings | Type I / II, Class 1A / 3 and electrical/corrosion requirements |
| ISO 7599 / ISO 10074 | Decorative/protective anodizing / hard anodizing | Applicable standard, revision and acceptance criteria |
| ISO 9001 | Quality management system requirements | Current certificate, legal entity, site, scope, issuer and validity |
| AS9102 / AIAG PPAP | FAI documentation / production part approval process | Customer-required format, submission scope and sign-off |
These are references for specifying your order, not certification badges. ISO 9001 concerns a management system; it does not certify an individual part. No AS9100, IATF 16949, UL or military qualification is implied by this table.
Ready to Discuss Your Custom Parts?
Confirm inspection requirements and prepare your RFQ in one place.
Quality Checks & Document Control
Confirm the required documentation and inspection scope during quotation.
Inspection planning illustration
- 01
Drawing & Revision
Agree the controlled specifications.
- 02
Inspection & Testing
Confirm features and measurement scope.
- 03
Records & Release
Agree documentation and release requirements.
What to Share for Your RFQ
Share the key requirements below before we meet at SEMA 2026.
CAD & Drawing
Current revision
Material & Finish
Grade and coating
Quantity & Delivery
Volume and target date
Quality Requirements
Critical features and records
ⓘ Final scope and documents are confirmed during quotation.
Reference information and arithmetic examples only. Confirm material, documentation, testing cost, duties and delivery terms in your quotation.
Dallas-Area Office & Warehouse
Local Support. Planned Deliveries.
Coordinate drawings, samples and updates with our Carrollton, Texas team. Inventory programs and scheduled releases depend on an agreed project plan.
Discuss your delivery requirements →
A Connected Supply Chain
Manufacturing in China. Inventory in Texas for agreed programs. Delivery to your schedule.
China
Manufacturing→Texas
Warehouse→Scheduled
U.S. Releases
Import duties still apply. Stocked delivery depends on the agreed program.Manufacturing→Texas
Warehouse→Scheduled
U.S. Releases
Packaging, MOQ, Lead Time, DDP & Payment
Packaging
Confirm surface protection, separators and labels.MOQ
Request a quantity review for prototypes and repeat orders.Lead time
Confirm timing after drawing and sample review.DDP
Request a landed quote with the agreed destination.Payment
Confirm terms and tooling milestones in the quote.
Confirm surface protection, separators and labels.MOQ
Request a quantity review for prototypes and repeat orders.Lead time
Confirm timing after drawing and sample review.DDP
Request a landed quote with the agreed destination.Payment
Confirm terms and tooling milestones in the quote.
BEFORE YOUR FIRST ORDER
Frequently Asked Questions
Can you work alongside our existing supplier?
Yes. Start with a selected part or overflow requirement. Your qualification process determines whether LK MFG becomes an approved second source.
What are the typical sample and production lead times?
Timing depends on geometry, quantity, material, tooling and inspection. Send these inputs so your quotation can separate sample, tooling and production milestones.
Can you test threads and assembly fit?
Request thread gauge and mating-part checks in your drawing or RFQ. We confirm the method, scope and required sample hardware before production.
Can you hold inventory in Texas and ship smaller quantities?
Discuss an agreed inventory program, including stock ownership, replenishment, release quantities and delivery addresses. Availability is project-specific.
How do you handle powder-coat color consistency?
Define a physical approved sample, gloss, texture, masking and acceptance criteria. Review coating allowance on threads and mating surfaces.
How are import duties and landed costs handled?
Confirm the quotation’s trade terms, importer responsibilities, freight and duty assumptions. Tariffs depend on classification, origin and current rules; no fixed duty rate is promised.
Can you provide DFM review with specific suggestions?
Send a controlled drawing and CAD file. Review can cover tool access, wall thickness, threads, tolerances and process alternatives for your part.
What payment terms are available?
Terms are confirmed in your quotation and order agreement. Ask about tooling, sample and production payment milestones before placing an order.
CUSTOMER FEEDBACK
What Our Customers Say
★★★★★
“Excellent communication, reliable quality, and strong support from prototype through production.”
★★★★★
“The parts arrived within tolerance, and the surface finish matched our requirements very well.”
★★★★★
“LK TOOLS has become a reliable manufacturing partner for our custom metal components.”
★★★★★
“LK TOOLS consistently delivers precision-machined parts that meet our drawings and quality requirements.”
★★★★★
“Outstanding surface finish and fast turnaround on our die casting prototypes. Highly recommend.”
★★★★★
“The injection molded parts were flawless. Great communication throughout the process and on-time delivery.”
