Socket Head Cap Screw Metric Dimensions & Thread Length | Buy
Socket Head Cap Screw Metric Dimensions & Thread Length โ Factory-Direct Quality
Stop overpaying for inconsistent fasteners. Get ISO 898โ1 certified socket head cap screws with precise metric dimensions, correct thread length, and traceable material certificates โ delivered in 15โ25 days.
โญ 10+ years export expertise | Shipped to 30+ countries | ISO 9001 & CE
โ๏ธ Hanguang Industrial Park, Handan
Why your current fastener supplier costs you time & money
Wrong thread length
35% of procurement leaders report that mismatched socket head cap screw thread length causes assembly rework and delays. (Internal survey, 2025)
Hidden logistics costs
Air freight from distant suppliers adds 18โ25% to your total landed cost. Factory-direct from Hebei cuts that by half.
Unreliable mechanical properties
Without traceable mill certificates, you risk fasteners that fail at rated torque. 11% of field failures trace back to subgrade cap screws.
Minimum order nightmares
Most mills demand MOQ of 10,000+ pieces. We serve SMEs & MRO buyers with flexible lots from 500 pieces.
Precision socket head cap screws with guaranteed metric dimensions
Every batch is manufactured to ISO 4762 / DIN 912 and inspected for socket head cap screw metric dimensions and thread length compliance.
Dimensional Accuracy ยฑ0.05 mm
CNC-turned and cold-headed with Go/No-Go gauging per ISO 1502. Thread length tolerance follows ISO 4759โ1 class A.
Full Metric Range M3 โ M24
Diameter, pitch, and socket head cap screw thread length options: full thread, partial thread, and custom shank lengths.
Material & Coating Options
Carbon steel (8.8/10.9/12.9), stainless steel (A2โ70/A4โ80), zinc-plated, Dacromet, hot-dip galvanized. RoHS & REACH compliant.
๐ Socket Head Cap Screw Metric Dimensions & Thread Length (Standard ISO 4762)
| Size (M) | Pitch (mm) | Head ร (dk) | Head Height (k) | Thread Length (b) Full | Thread Length (b) Partial | Hex Socket Size |
|---|---|---|---|---|---|---|
| M4 | 0.7 | 7.0 | 4.0 | 12 | 8 | 3.0 |
| M5 | 0.8 | 8.5 | 5.0 | 14 | 10 | 4.0 |
| M6 | 1.0 | 10.0 | 6.0 | 16 | 12 | 5.0 |
| M8 | 1.25 | 13.0 | 8.0 | 20 | 16 | 6.0 |
| M10 | 1.5 | 16.0 | 10.0 | 25 | 20 | 8.0 |
| M12 | 1.75 | 18.0 | 12.0 | 30 | 24 | 10.0 |
| M16 | 2.0 | 24.0 | 16.0 | 38 | 32 | 14.0 |
| M20 | 2.5 | 30.0 | 20.0 | 46 | 40 | 17.0 |
| M24 | 3.0 | 36.0 | 24.0 | 54 | 48 | 19.0 |
* All dimensions in mm. Custom thread length available. Contact us for non-standard socket head cap screw metric dimensions.
Agricultural Machinery
Harvester arm assemblies, tractor PTO mounts โ grade 12.9 with Dacromet coating resists vibration.
Construction & Structural
Steel connection brackets, formwork clamps โ socket head cap screw thread length optimized for shear loads.
Automotive & Off-Highway
Engine mounting, transmission housings โ 100% traceable batches with PPAP Level 3.
Trusted by engineers & procurement teams worldwide
โWe switched to Boen for M8 x 30 socket head cap screws. Their socket head cap screw metric dimensions are consistent, and thread length is exactly as specified. Rejected parts dropped from 4% to 0.3%.โ
โ Marcus V., Procurement Manager, Automotive Tier 1 (Germany)โBoenโs factory-direct pricing saved us 22% vs our previous supplier. The 12.9 grade cap screws with Dacromet perform perfectly in our hydraulic presses.โ
โ Sarah L., Operations Director, Construction Equipment (USA)โReliable partner for OEM projects. We order M16 x 60 partial thread cap screws weekly. The thread length is always on spec, and the certificates are always included.โ
โ Tomo S., Supply Chain Manager, Industrial Machinery (Japan)Frequently Asked Questions
๐น What are the standard socket head cap screw metric dimensions?
Standard diameters range from M3 to M24, with head diameters, heights, and hex socket sizes per ISO 4762. See our table above for exact socket head cap screw metric dimensions.
๐น How is socket head cap screw thread length defined?
Thread length (b) is the fully threaded portion from the point. For full thread, b = nominal length minus a small chamfer. For partial thread, the shank is unthreaded. We follow ISO 4762 and can customize.
๐น Can you provide custom thread length for socket head cap screws?
Yes. We offer made-to-order shank and thread lengths. Just send your drawing or specify the socket head cap screw thread length requirement. MOQ from 500 pcs.
๐น What certificates do you provide?
ISO 9001, CE, RoHS, REACH, and material mill certificates (MTC) with each batch. Third-party inspection (SGS, TรV) is available at cost.
๐น What is the typical lead time?
Standard sizes: 15โ20 days. Custom thread length or coatings: 20โ25 days. Express shipping (DHL, FedEx) available for urgent orders.
๐น Do you offer free samples?
Yes. Qualified buyers can request up to 10 free samples. You pay only shipping. Email shuan@fastenboen.com.
๐น How do you ensure dimensional accuracy?
100% Go/No-Go thread gauging, optical measurement for head dimensions, and tensile testing per ISO 898โ1. Socket head cap screw metric dimensions are verified before shipment.
โก Ready to secure precision fasteners at factory-direct prices?
Request a quote before March 31, 2026 and receive free sample kit + priority production slot.
๐ง shuan@fastenboen.com ย |ย ๐ +86 15630072814 ย |ย ๐ boenfasteners.com
โ Free samples for qualified buyers ย |ย โ Money-back guarantee on dimensional compliance
What our customers say
โBoenโs socket head cap screws have the most consistent thread length weโve tested. Our assembly line throughput improved by 12%.โ
โ Frank O., Maintenance Manager, UK
โAfter switching to Boen, our fastener rejection rate dropped from 5% to 0.2%. The metric dimensions are spot on.โ
โ Elena R., Quality Engineer, ItalyโFast delivery, excellent communication. The 12.9 grade cap screws with Dacromet are perfect for our heavy equipment.โ
โ David K., Supply Chain Director, Canada
Written by Chen Wei โ Senior Fastener Engineer & Export Manager
15+ years in industrial fastener manufacturing, ISO 898/9001 lead auditor, and author of โMetric Fastener Design for Global Supply Chainsโ. Chen Wei oversees technical compliance at Boen Fastener and has personally qualified over 200 fastener SKUs for export to Europe and North America.
๐ง shuan@fastenboen.com ย |ย ๐ Boen Fasteners
๐ฌ Real conversations with our clients
WhatsApp & email conversations with verified buyers. Names redacted for privacy.
