Thread Stripping & Rework

A 5/16-18 x 1 socket head cap screw with poor thread engagement fails under 45 ft-lbs. Rework costs you $2,400+/hour on a production line.

Oversized Inventory, Shrinking Margins

Sourcing 5 16 18 x 3 4 socket head cap screw from multiple vendors increases logistics cost by 18% and doubles lead time.

Hidden Non-Compliance Risks

Without proper ISO 898-1 certification, your fastener shipment may be detained at customs — costing $1,200+ per day in demurrage.

Brittle Failure in the Field

A 5/16-18 x 1 socket head cap screw that lacks proper heat treatment can snap under cyclic load. Field failure = 10x replacement cost.

Factory-Direct Power

Eliminate 2-3 middlemen. Save 22-37% on every 5 16 18 x 3 4 socket head cap screw order.

Material & Heat Treat Control

Alloy steel 40Cr, 10.9 grade, consistent HRC 32-39 — no shortcuts.

15-Day Express Delivery

From Handan to Rotterdam or Chicago. Door-to-door tracking included.

Agricultural Machinery

5 16 18 x 3 4 socket head cap screw used in header assemblies — reduced vibration loosening by 62% vs. hex bolts.

Automotive Chassis

5 16 18 x 1 socket head cap screw for steering knuckles — passed 200k cycle fatigue test.

📍 Handan facility — 12,000 m², 150+ skilled workers

✅ ISO 9001:2015 • CE • RoHS • REACH • UKCA — full compliance documentation.

The only difference is length: 1.000" vs 0.750". Both share the same 5/16-18 UNC thread, grade 10.9 material, and load capacity. Use the 3/4" for confined spaces, 1" for thicker clamping stacks.

Yes, every batch of 5 16 18 x 3 4 socket head cap screw ships with ISO 898-1 mill test report, RoHS declaration, and full traceability. Free of charge.

Standard sizes (1" and 3/4") have MOQ 1,000 pcs. Non-standard lengths: MOQ 5,000 pcs. Lead time 10-18 days.

T/T (30% deposit, 70% before shipment), L/C at sight, PayPal for samples. Net 30 available for qualified buyers.

By sea (FOB Tianjin or CIF) or air freight. Typical transit: 25-30 days sea, 5-7 days air. Full tracking provided.

Yes, 5 free samples per size for qualified procurement inquiries. You only pay shipping (courier account).

Minimum tensile strength 1,040 MPa (150,000 psi). Yield strength ~940 MPa. Proof load 830 MPa.

Click the "Get Free Quote" button, email shuan@fastenboen.com, or WhatsApp +86 15630072814. Reply within 2 hours.

Elena V.
Supply Chain Director, Italy

"The 5 16 18 x 3 4 socket head cap screw arrived 3 days early. Coating consistency is excellent. We've reordered 4 times."

James R.
Engineering Manager, UK

"Boen's 5 16 18 x 1 socket head cap screw passed our 200-hour salt spray test with zero red rust. Outstanding quality."

Sofia L.
Procurement, Poland

"Fastest response time among 5 Chinese suppliers. Quotation in 40 minutes. Samples arrived in 6 days."