Premier Custom Fasteners: Built from Your Drawings
Kbear Metal manufactures engineered fasteners from your CAD drawings, samples, or napkin sketches. Cold heading, hot forging, CNC machining, and thread rolling — we cut tooling in 7–15 days and start production immediately.
// Custom Project Spec
Custom fastener categories we produce
From simple non-standard dimensions to fully engineered specialty fasteners.
Custom Bolts
Non-standard head shape, thread length, shoulder, or knurl. Hex, flange, eye, and shoulder bolt variants.
Custom Screws
Custom drive recess, head style, thread profile, or tip geometry for OEM equipment assembly.
Custom Nuts
Non-standard hex, square, oval, or extruded nuts. Welded nuts, T-nuts, captive nuts.
Special Washers
Custom inner / outer diameter, thickness, shape (D-washer, keystone, slotted), and bonded composites.
Stud Bolts
Double-end threaded studs, tap-end studs, and full-thread rod cut to custom length.
Anchors & Inserts
Drop-in anchors, wedge anchors, threaded inserts, helical inserts to drawing.
Pins & Shafts
Dowel pins, clevis pins, spring pins, custom shafts with knurls and grooves.
Forgings & Specialty
Hot-forged eye bolts, hook bolts, and ring bolts. Larger size capability up to M64.
Assemblies
Pre-assembled fastener kits — bolt + nut + washer combinations bagged or boxed.
Custom fastener project capability matrix
What we can do — by process, size range, and typical lead time.
| Process | Size Range | MOQ | Tooling Lead | Best For |
|---|---|---|---|---|
| Cold Heading | M2 – M30 | 5,000 pcs | 7–10 days | Round, hex, flange heads |
| Hot Forging | M16 – M64 | 2,000 pcs | 10–15 days | Large bolts, eye bolts |
| CNC Machining | M3 – M50 | 500 pcs | 3–5 days | Low volume, complex geometry |
| Stamping | Variable | 10,000 pcs | 5–10 days | Washers, brackets, clips |
| Thread Rolling | M2 – M30 | 5,000 pcs | 3 days | Cold-formed threads |
| CNC + Roll Combo | M3 – M30 | 1,000 pcs | 5–7 days | Custom + standard thread |
| Deep Drawing | Variable | 20,000 pcs | 15–20 days | Cup nuts, cylindrical |
Specify any material we can source
Our mill network covers commodity and specialty alloys with traceability.
Q235 · C45 · 10B21
Standard custom fasteners
SCM435 · 40Cr · 42CrMo
High-strength applications
304 · 316 · 316L · Duplex
Corrosion-resistant
6061 · 7075 · 2024
Lightweight aerospace
Gr 2 · Gr 5
Weight-critical, severe service
Silicon · Phosphor
Marine, electrical
Inconel · Monel · Hastelloy
High-temp, severe chemical
17-4PH · 17-7PH · Alloy 20
Aerospace, oil & gas
From your drawing to packed pallet
Six structured stages with engineering checkpoints at every transition.
Drawing Review
Engineers review DWG / STEP within 48 hours and return DFM feedback.
Tooling Design
CAD/CAM team designs heading dies, rolling dies, and machining fixtures.
Tooling Cut
In-house die shop cuts new dies in 7–15 days depending on complexity.
Sample Run
First-article samples produced and inspected against drawing tolerances.
Production Run
After sample approval, full production starts with in-process QC sampling.
Final QC & Pack
Dimensional inspection, mechanical testing, packed per buyer specification.
Engineering review before tooling is cut.
Most custom fastener problems are designed in, not manufactured in. Our engineering team flags tolerance stacks, manufacturability issues, and cost-down opportunities before any tooling money is spent.
DFM Review
Design-for-manufacture review highlights tolerance issues, material savings, and process risks.
First Article Inspection
Initial sample run measured against every drawing dimension before mass production starts.
CMM Inspection
Coordinate measuring machine verifies complex geometry to drawing tolerance.
PPAP Documentation
Production part approval process docs available for automotive and aerospace buyers.
Custom fastener projects we typically handle
OEM equipment, aerospace, defense, and industries with niche specifications.
OEM Equipment
Custom branded fasteners for industrial machinery and appliance assembly.
Aerospace
Titanium and 17-4PH fasteners to AS / AMS / NAS specifications.
Defense
Mil-spec fasteners to MS, AN, and proprietary specifications.
Medical Devices
316L and titanium fasteners for implantable and surgical devices.
Wind & Solar
Tower and tracker fasteners engineered to project-specific loads.
Railway
Track bolts, clamps, and specialty assemblies to AREMA, EN, UIC.
Marine
Custom 316L and silicon bronze fittings for boat builders.
Automotive Tier-1
PPAP-documented engine, chassis, body fasteners.
Why engineering teams choose Kbear for custom
Six factory-direct advantages that protect your custom-fastener project budget.
In-house die shop
We cut our own heading and rolling dies — no outsourcing, no scheduling delays.
48-hour DFM response
Engineering team reviews drawings and returns manufacturability feedback in two business days.
Low MOQ for CNC
CNC machining lets us run as few as 500 pcs of low-volume custom parts.
NDA-ready
Standard non-disclosure agreement available — we routinely sign before quoting OEM projects.
Material traceability
Mill certs, heat numbers, and lot tracking from raw wire to finished part.
PPAP capability
Full production part approval process documentation for automotive and aerospace buyers.
Inside our custom tooling and machining areas
In-house die shop, CNC machining centers, CMM inspection lab, and sample-run cells for custom fastener projects.
Watch custom fasteners being made
Three short videos showing die cutting, CNC machining, and first-article inspection for engineered fastener projects.
Cold Heading to Thread Rolling
New heading and thread-rolling dies cut in-house from buyer drawings — 7 to 15 day tooling time.
Inspection & Testing Process
CNC machining for low-volume custom parts and CMM inspection of first-article samples against drawing tolerances.
Packing to Container Loading
Finished custom batches packed with PPAP documentation and shipped to OEM, aerospace, and tier-1 buyers.
Free Samples
Standard fastener samples shipped free for evaluation. You only cover express courier cost.
First-Order Inspection
Third-party SGS or BV inspection on your first order at our cost — verify before paying balance.
30% Deposit Only
T/T 30% deposit gets your order into production. 70% balance after pre-shipment inspection.
Quality Replacement
Any defect outside agreed AQL gets replaced free on the next shipment, no questions asked.
Common questions on custom fastener projects
Quick answers on file formats, MOQ, NDA, and tooling costs.
What file formats do you accept for custom drawings?
Do you sign NDAs before quoting?
What is the typical tooling cost for custom fasteners?
What is your minimum order quantity for custom?
How long from drawing to delivery?
Can you reverse-engineer a sample we send?
Contacts
Kbear Metal Factory
Zhanggezhuang Industrial Pack, Pingdu, China
Head Office
Support
+86 18562662895