Metric Socket Head Screw Dimensions & Stainless Torque | Wholesale
⚙️ Metric Socket Head Screw Dimensions & Stainless Torque — Wholesale Direct from Factory
Precision-engineered metric socket head cap screws with verified torque charts, full dimensional specs, and 30–50% cost savings versus distributor pricing. For OEMs, MRO buyers, and industrial procurement teams demanding ISO 898‑1 compliance and traceable quality.
🚚 Wholesale pricing · ISO 9001:2015 · 10+ years export expertise · 30+ countries
📑 Table of Contents
🚨 Why “Cheap” Socket Screws Cost You 3× More
Three pain points that erode your margin — and your reputation
Dimensional Deviation
A 0.1 mm tolerance drift on metric socket head screw dimensions causes thread stripping, joint failure, and field recalls. A German automotive tier‑1 reported €220 000 in rework costs from a single bad batch of M8×35 cap screws.
Torque Guesswork
Without a verified metric stainless steel socket head cap screw torque chart, your operators either under‑tighten (loose joints) or over‑torque (gallling & breakage). Industry data shows 34% of warranty claims in industrial equipment trace back to incorrect fastener torque.
Supply Chain Risk
Distributor markups of 40–60%, unpredictable lead times, and mixed‑lot certificates. A U.S. agricultural machinery buyer lost $47 000 in production downtime because a “stock” M10×20 socket screw was back‑ordered for 11 weeks.
✅ Boen Precision Socket Head Screws — Engineered for Certainty
Every dimension, every torque spec — traceable, repeatable, certified.
- ✔ ISO 898‑1 Property Class 8.8 / 10.9 / 12.9
Full mechanical testing — yield, tensile, hardness — per batch. No “blended” lots. - ✔ A2‑70 / A4‑80 Stainless Steel
Passivated & certified per EN 10204 3.1 — corrosion resistance validated in salt‑spray tests. - ✔ Full Dimensional Traceability (DIN 912 / ISO 4762)
Certified metric socket head screw dimensions — M3 to M48 — with 0.02 mm optical measurement. - ✔ Verified Torque Data Included
Every box ships with a metric stainless steel socket head cap screw torque chart — lubrication factors, k‑values, and clamp load calculations. - ✔ Factory‑Direct Pricing — 30–50% Below Distributor
No middlemen. One supply‑chain partner from material sourcing to logistics.
📸 CNC thread rolling & automated heat‑treat line — Handan, China
📐 Metric Socket Head Screw Dimensions & Torque Table
Full specs for M3 to M48 — use this table to verify your current supplier’s compliance.
| Thread Size | Pitch (mm) | Head Ø (mm) | Head Height (mm) | Hex Key Size | Torque (N·m) A2‑70 * | Torque (N·m) 12.9 * |
|---|---|---|---|---|---|---|
| M3 | 0.5 | 5.5 | 3.0 | 2.5 | 1.2 | 2.2 |
| M4 | 0.7 | 7.0 | 4.0 | 3.0 | 2.8 | 5.0 |
| M5 | 0.8 | 8.5 | 5.0 | 4.0 | 5.5 | 10.0 |
| M6 | 1.0 | 10.0 | 6.0 | 5.0 | 9.5 | 17.0 |
| M8 | 1.25 | 13.0 | 8.0 | 6.0 | 23.0 | 41.0 |
| M10 | 1.5 | 16.0 | 10.0 | 8.0 | 46.0 | 83.0 |
| M12 | 1.75 | 18.0 | 12.0 | 10.0 | 80.0 | 145.0 |
| M16 | 2.0 | 24.0 | 16.0 | 14.0 | 200.0 | 360.0 |
* Torque values based on μ = 0.14 (zinc‑plated/oiled). For stainless steel use μ = 0.20 — refer to full metric stainless steel socket head cap screw torque chart included with every shipment.
🏭 Factory & Certification — What You Can Trust
ISO 9001:2015
Quality Management
CE / UKCA
EU Market Compliance
UL Recognized
Component Recognition
RoHS & REACH
Chemical Compliance
❓ Frequently Asked Questions
Q1: What metric socket head screw dimensions do you offer?
We cover M3 to M48 in standard lengths from 6 mm to 300 mm, per DIN 912 / ISO 4762. Custom lengths and head configurations (low‑head, shoulder) are available for OEM orders above 2 000 pcs.
Q2: Do you provide a metric stainless steel socket head cap screw torque chart?
Yes. Every shipment includes a factory‑verified torque chart for A2‑70, A4‑80, and carbon steel grades (8.8, 10.9, 12.9), with lubrication factors and target clamp loads. Requests for custom torque validation are welcome.
Q3: What is your minimum order quantity (MOQ) for wholesale?
Stock sizes (M6–M20) have an MOQ of 500 pcs per size. For custom dimensions or high‑strength grades, MOQ starts at 2 000 pcs. We offer tiered pricing — the more you order, the lower your unit cost.
Q4: How do you ensure quality consistency across batches?
We follow a three‑stage QC process: incoming material chemical analysis, in‑process dimensional inspection (optical & go/no‑go gauges), and final mechanical testing per ISO 898‑1. Batch records are retained for 10 years.
Q5: What are your typical lead times and shipping costs?
Stock items ship within 7–15 days after order confirmation. For large wholesale orders (20 000+ pcs), lead time is 25–30 days. We offer FOB Tianjin, CIF, and DDP terms. Shipping costs are calculated at quote — but our factory‑direct model typically saves you 30–50% on total landed cost.
Q6: Can you provide custom packaging or private labeling?
Absolutely. We offer OEM/ODM packaging — poly bags, blister packs, bulk cartons, or branded boxes with your logo. Barcode, lot number, and torque chart inclusion are standard for wholesale buyers.
Q7: Do you offer free samples for quality validation?
Yes — we provide free samples for up to 10 pcs of any standard size. You only pay shipping. This allows your engineering team to validate metric socket head screw dimensions and torque performance before committing to a volume order.
Q8: What payment methods do you accept?
We accept T/T (wire transfer), L/C, PayPal (for samples), and Alibaba Trade Assurance. For long‑term wholesale contracts, net‑30 or net‑60 terms are available after credit evaluation.
⭐ Real Reviews from Global Buyers
James Mitchell
Procurement Manager, Mitchell Industrial (UK)
“We switched to Boen for M8 and M10 socket head screws. The torque chart accuracy saved us 12% on assembly rework. Their metric socket head screw dimensions matched our gauges perfectly — every batch. Lead times are consistently 10 days.”
★★★★★
Maria Santos
Supply Chain Lead, AgroParts (Brazil)
“Boen’s stainless steel A4‑80 cap screws are the only ones that passed our 200‑hour salt spray test without pitting. Their pricing is 40% lower than our previous European supplier. We now order 50 000 pcs quarterly.”
★★★★★
Andreas Weber
Technical Director, Weber Automation (Germany)
“The metric stainless steel socket head cap screw torque chart Boen provided matched our own engineering calculations within 3%. That level of transparency is rare. We’ve standardized on Boen for all M6–M12 assemblies.”
★★★★★💬 Real‑Time Support — What Our Buyers Say
📸 Live chat with our sales engineers — instant torque specs, dimension confirmations, and shipping quotes.
✍️ About the Author — Chen Wei
Senior Fastener Engineer & Export Manager at Handan Boen Fastener Manufacturing Co., Ltd. With 14 years of experience in fastener design, material science, and international supply chains, Chen has overseen over 2 000 metric socket head screw batches shipped to 30+ countries. He is a certified ISO 9001 lead auditor and regularly contributes to fastener standards discussions in the Asia Fastener Association.
⚡ Get Your Wholesale Quote — with Full Torque & Dimensional Data
📦 Limited‑time offer: Free sample kit (10 pcs) + torque chart with your first order.
🛡️ Risk‑free guarantee: If dimensions or torque values deviate from spec, we replace the entire batch — including freight.
📧 shuan@fastenboen.com · mary@fastenboen.com · grace@fastenboen.com · stella@fastenboen.com
📍 Hanguang Industrial Park, Yongnian District, Handan, Hebei, China · Mon–Fri 09:00–17:00
