M4 Cap Head Screw & M5 Button Head Screw | Wholesale
⚙️ BOEN FASTENERS — EST. 2010
M4 Cap Head Screw & M5 Button Head Screw — Factory-Direct Wholesale
Stop overpaying for standard fasteners. We deliver M4 cap head screws and M5 button head screws with ISO-certified quality, 10+ years export expertise, and pricing that beats distributors by 20–35%. Perfect for automotive, agricultural machinery, and construction buyers in USA & Europe.
🏭 Handan Boen Fastener — Hanguang Industrial Park
⚠️ The Real Cost of Cheap M4 Cap Head Screws & M5 Button Head Screws
You may think you're saving money — but here's what procurement managers in the US & Europe are actually facing:
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Hidden Cost #1: Price Inflation
Distributors in the US/EU often add 30–50% markup on standard fasteners. A box of 500 M5 button head screws that costs $18 at the factory can sell for $32+ through a local supplier. You're paying for their warehouse, not your quality.
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Hidden Cost #2: Inconsistent Quality
M4 cap head screws from uncertified sources often fail torque tests. 12% of low-cost imports show hardness deviations > 15 HRC, causing assembly line stoppages and rework that costs $200–$600 per hour in downtime.
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Hidden Cost #3: Supply Chain Fragmentation
Sourcing from 3–4 different suppliers for standard fasteners increases administrative overhead by 18–25% per purchase order. One supplier for M5 button head screws, another for M4 cap head screws — it's inefficient and risky.
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Hidden Cost #4: Shipping & Lead Time Chaos
Ocean freight from Asia can be unpredictable. But a single-source factory partner with consolidated shipping reduces your logistics cost by 22% on average and cuts lead time variance by half.
📊 According to a 2025 industry survey, 67% of procurement managers cite "inconsistent fastener quality" as their top reason for switching suppliers. Don't let cheap fasteners cost you more.
✅ Our Solution: M4 Cap Head Screw & M5 Button Head Screw — Wholesale Excellence
From a single source — ISO 9001 certified factory, 10+ years export experience, and direct pricing that protects your margins.
Factory-Direct Pricing — Save 20–35%
We are the manufacturer. No middlemen. Our M4 cap head screw and M5 button head screw wholesale prices are 20–35% lower than US/EU distributor prices for equivalent quality. Volume discounts available from 10,000 pcs.
ISO 9001 & CE Certified Quality
Every batch of M5 button head screws is tested for hardness (Grade 10.9/12.9), tensile strength, and dimensional accuracy. ≤ 0.2% defect rate — guaranteed in writing.
High-Speed Delivery — 15–25 Days
Stock sizes of M4 cap head screw and M5 button head screw ship within 7–10 days. Custom orders (OEM/ODM) in 15–25 days. We handle all logistics — FOB, CIF, DDP — to USA & Europe.
OEM/ODM Customization
Need a specific drive type, coating (zinc, black oxide, Dacromet), or custom packaging? We support full OEM/ODM for M4 cap head screws and M5 button head screws. Your brand, your specs.
One-Stop Service — End-to-End Support
From material selection (carbon steel, 304/316 stainless steel, alloy steel) to logistics tracking, our team handles it all. ERP integration, COA documents, and customs clearance support included.
Global Compliance — USA & Europe Ready
Our fasteners meet ASTM, DIN, ISO, and GB standards. Certificates include ISO 9001, CE, RoHS, and SGS reports — fully compliant for US and EU markets.
📐 Technical Specifications — M4 Cap Head Screw & M5 Button Head Screw
| Parameter | M4 Cap Head Screw (DIN 912) | M5 Button Head Screw (DIN 7380) |
|---|---|---|
| Thread Diameter | M4 (4.0 mm) | M5 (5.0 mm) |
| Pitch | 0.7 mm (standard) | 0.8 mm (standard) |
| Head Type | Socket Cap (cylindrical, hexagon drive) | Button Head (low-profile, hexagon drive) |
| Drive Size | 3 mm hex key | 4 mm hex key |
| Material Options | Carbon Steel 10.9/12.9, 304 SS, 316 SS | Carbon Steel 10.9/12.9, 304 SS, 316 SS |
| Coating / Finish | Zinc plated, black oxide, Dacromet, plain | Zinc plated, black oxide, Dacromet, plain |
| Hardness (Grade 12.9) | 38–44 HRC | 38–44 HRC |
| Tensile Strength (Grade 12.9) | ≥ 1220 MPa | ≥ 1220 MPa |
| Length Range | 6 mm – 60 mm (stock) | 6 mm – 50 mm (stock) |
| Standards | DIN 912, ISO 4762, GB/T 70.1 | DIN 7380, ISO 7380, GB/T 70.2 |
🔍 Custom lengths, drives (Torx, Phillips), and coatings available upon request. Contact us for a full spec sheet.
🔧 Where M4 Cap Head Screws & M5 Button Head Screws Are Used
Real-world applications from our clients across automotive, agriculture, and construction.
Automotive Assembly
M4 cap head screws are widely used in engine components, sensor brackets, and interior modules. A Michigan-based Tier 1 supplier switched to our M4 cap head screw (Grade 12.9) and reduced fastener failure rate from 1.8% to 0.06% — saving $47,000 annually in warranty claims.
Agricultural Machinery
M5 button head screws are preferred for harvester guards, panel covers, and conveyor guides due to their low profile and vibration resistance. A German farm equipment OEM standardised on our M5 button head screw (304 SS) and cut assembly time by 12% thanks to consistent hex drive fit.
Construction & Structural Fixings
From steel frame connections to railing systems, our fasteners meet ASTM standards. A UK construction firm used our M4 cap head screw (zinc-plated, Grade 10.9) for curtain wall brackets and reported zero failures in 18 months of field testing.
❓ Frequently Asked Questions About M4 Cap Head Screws & M5 Button Head Screws Wholesale
⭐ Real Reviews from Buyers Like You
"I've been sourcing M4 cap head screws for our tractor assembly line for 2 years. Boen's quality is consistently excellent. Their QC reports are detailed, and they always ship on time. Saved us 22% vs. our previous supplier."
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Hans D., Operations Manager, Austria
"The M5 button head screws (304 SS) we ordered for our food processing equipment were perfect. Zero corrosion issues in 8 months of daily washdown. Fast shipping and great communication. Will order again."
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James R., Plant Engineer, UK
"We needed a custom length M4 cap head screw for a special bracket assembly. Boen's team helped us with the design, produced samples in 5 days, and delivered the full order in 18 days. Unbeatable service."
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Maria K., Purchasing Manager, Spain
✍️ About the Author
This article was written by David Chen, Senior Fastener Engineer at Handan Boen Fastener Manufacturing Co., Ltd. With 14 years of experience in industrial fastener design, quality control, and global supply chain, David has helped 200+ B2B buyers across 30+ countries optimize their fastener procurement. He specializes in M4 cap head screws, M5 button head screws, and high-strength fastening solutions for automotive, agricultural, and construction industries.
Ready to Secure Your M4 Cap Head Screw & M5 Button Head Screw Supply?
Get factory-direct pricing, ISO-certified quality, and a dedicated account manager. First order qualifies for free samples + express shipping discount.
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🏆 Trusted by Buyers in 30+ Countries
+ 20+ more global brands
"We switched to Boen for our M5 button head screws and cut our fastener spend by 28%. The quality is consistent, and their QC documentation gives us full traceability."
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Thomas W., Procurement Manager, Germany
"The M4 cap head screw (Grade 12.9) from Boen outperformed our previous supplier. Zero failures in 6 months of production. Highly recommend for automotive applications."
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Sarah L., Supply Chain Director, USA