M4 Cap Head Screws & M4 Socket Head Screw | Supplier
M4 Cap Head Screws & M4 Socket Head Screw โ Factory-Direct Supplier
Cut procurement costs by 28โ37% without compromising on strength or precision. ISO 9001 ยท 12.9 Grade ยท Same-day dispatch for volume orders
โ ๏ธ Hidden Costs That Eat Your Margins
โ Boen Fastener solves all four โ one factory, one invoice, one trusted quality standard.
๐ฉ M4 Cap Head Screws & M4 Socket Head Screw โ Engineered for Reliability
Every m4 cap head screws and m4 socket head screw we produce is made from grade 12.9 alloy steel or A2-70 stainless steel, cold-forged on automated lines, and inspected under 3-stage QC. Suitable for automotive sub-assemblies, agricultural machinery, electronics enclosures, and general construction.
| Parameter | M4 Cap Head Screw | M4 Socket Head Screw |
|---|---|---|
| Thread Diameter | M4 (4.0 mm) | M4 (4.0 mm) |
| Head Type | Low-profile cap (DIN 84 / ISO 1207) | Cylindrical socket (DIN 912 / ISO 4762) |
| Drive | Slot / Phillips / Hex | Hex socket (Allen key) |
| Material Grades | 12.9, 10.9, A2-70, A4-80 | 12.9, 10.9, A2-70, A4-80 |
| Finish Options | Zinc plated, black oxide, HDG, plain | Zinc plated, black oxide, HDG, plain |
| Tensile Strength (12.9) | โฅ 1,200 MPa | โฅ 1,200 MPa |
| Length Range | 6 mm โ 60 mm | 6 mm โ 80 mm |
Powerful Factory
12 cold-forging lines, 3 automated heat-treatment ovens, and 48-hour cycle time for standard M4 socket head screw orders.
Quality Assurance
3-stage QC (incoming wire, in-process, final) + torque test certificate. < 0.12% defect rate in 2025.
High-Speed Delivery
Same-day dispatch for stock M4 cap head screws. 15โ20 days from order to FOB Tianjin for bulk.
๐ Real-World Applications
โ Frequently Asked Questions
What is the difference between an M4 cap head screw and an M4 socket head screw?
An M4 cap head screw (DIN 84) has a low-profile domed head, while an M4 socket head screw (DIN 912) features a cylindrical head with an internal hex drive. Both share the same M4 thread but suit different clearance and torque requirements.
Can you supply M4 socket head screws in 12.9 grade with black oxide finish?
Yes โ we stock 12.9 alloy steel M4 socket head screws with black oxide as standard. Lead time: 3โ5 days for stock, 12โ15 days for custom lengths.
What is the minimum order quantity (MOQ) for M4 cap head screws?
For stock sizes (M4ร8 to M4ร30), MOQ is 5,000 pcs per size. For non-standard lengths or custom coatings, MOQ starts at 20,000 pcs. Free samples available for evaluation.
Do you provide test certificates or material traceability?
Absolutely โ every shipment includes a Mill Test Certificate (EN 10204 3.1) and a torque test report. Third-party inspection (SGS, TรV) is also available at cost.
How do you handle shipping to the USA or Europe?
We ship via FOB Tianjin, CIF Hamburg, or DDP to major US ports. Typical transit: 18โ28 days. We also offer air freight for urgent orders (3โ5 days).
Can you produce M4 cap head screws with a custom head logo?
Yes โ OEM/ODM is one of our core services. We can stamp or engrave your brand logo on the head. Die cost: $120โ180, lead time +2 days.
What payment terms do you offer?
Standard terms: T/T (30% deposit, 70% before shipment). For established clients, we also accept L/C at sight and PayPal for small orders.
How do I request a free sample of M4 socket head screws?
Simply click the โRequest Sampleโ button above or email shuan@fastenboen.com. We provide free samples (up to 50 pcs) with you covering only the shipping cost.
โญ What Our Customers Say
Procurement Lead, Bosch USA
โWe use 2.8 million M4 socket head screws annually. Boenโs pricing was 22% lower than our previous supplier, and the torque consistency is remarkable.โ
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Supply Chain Manager, Alstom UK
โThe custom M4 cap head screws with our logo arrived 5 days early. Zero defects out of 50,000 pieces. Boen is now our preferred fastener partner.โ
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Owner, Vogt Maschinenbau GmbH
โWe switched because of repeated thread galling issues with our old supplier. Boenโs M4 socket head screws solved the problem. Downtime reduced by 70%.โ
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โ31% cost savings on M4 cap head screws vs. local distributor. The free sample program made the decision easy.โ โ โ โ โ โ
โBoenโs logistics team coordinated mixed LCL shipments across 3 projects. No delays, no damage.โ โ โ โ โ โ
Senior Fastener Engineer, 18 yrs in industrial fastening
โIโve personally overseen the production of over 120 million M4 socket head screws. At Boen, we combine German-engineered tooling with Chinaโs supply-chain efficiency โ thatโs how we deliver 12.9-grade quality at 30% less cost. Every batch is traceable, every certificate is real.โ
๐ Ready to Secure Your M4 Fastener Supply?
Limited-time offer: Free sample pack (50 pcs) + 3% discount on first container order. ๐ Offer valid until 30 June 2026
โ Risk-free guarantee: Free samples ยท Full refund if quality fails your in-house test ยท 24/7 support
๐ญ Trusted by 30+ Countries โ Since 2010
Some of our global partners:
โWe switched to Boen for our M4 socket head screw supply. Defect rate dropped from 1.8% to 0.08%, and we saved โฌ23,000 annually on rework. The factory audit was flawless.โ
โ Henrik Larsson, Procurement Manager, Volvo CE (Sweden)