5/16 Stainless Steel Bolts & 5/32 Bolt 5/8-11 Bolt | Supplier
๐ ๏ธ Stop overpaying for industrial fasteners. Get ISO-certified 5/16 stainless steel bolts, 5/32 bolt, and 5/8-11 bolt with 30% lower cost + 10-day lead time โ no minimum order quantity required.
๐ Get Free Quote in 24hโ Free samples available โ 30+ countries served โ 10+ years export expertise
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Every procurement manager knows the struggle. Here are the 6 most painful problems we hear from buyers like you โ and why they cost you more than you think.
Distributors mark up 5/16 stainless steel bolts by 40-60%. You pay for layers you don't need.
A batch of 5/32 bolt fails torque testing. Production line stops. You lose $2,600/hour in downtime.
Split shipments, delayed customs, missing documents. Your 5/8-11 bolt order arrives 3 weeks late โ and you pay the rush fee.
No CE, no ISO, no material certs. Your compliance team rejects the shipment. You start over.
You only need 500 pcs of 5/16 stainless steel bolts but the supplier demands 10,000. Your cash flow gets stuck.
A defect appears in your 5/8-11 bolt order. The supplier stops replying. You bear the rework cost alone.
โฌ๏ธ These 6 problems cost our clients an average of $18,000 per year in hidden losses.
We don't just sell 5/16 stainless steel bolts, 5/32 bolt, and 5/8-11 bolt โ we engineer supply chain peace of mind. Here's how.
We own the production line. 30-45% lower cost than distributors. Same quality as top-tier brands.
Every 5/16 stainless steel bolts batch comes with a mill test certificate (MTC). 100% traceable from melt to finished part.
Stock 5/32 bolt and 5/8-11 bolt ship in 7-10 days. Custom sizes in 15-20 days. No surprises.
ISO 9001, CE, RoHS, FCC, and more. Your compliance team approves in one review โ not three.
Need 200 pcs of 5/16 stainless steel bolts? Done. 50,000 pcs? Also done. We grow with your order.
We ship to 30+ countries via sea, air, or express. DDP, FOB, CIF โ you choose the terms.
All data verified by our in-house lab. Click any row to request a full datasheet.
| Parameter | 5/16 Stainless Steel Bolts | 5/32 Bolt | 5/8-11 Bolt |
|---|---|---|---|
| Diameter (inch) | 5/16" (0.3125") | 5/32" (0.15625") | 5/8" (0.625") |
| Threads Per Inch (TPI) | 18 / 24 (UNC/UNF) | 32 (UNF) | 11 (UNC) |
| Material Grade | SS304 / SS316 / SS316L | SS304 / SS316 | SS304 / SS316 / Alloy Steel |
| Tensile Strength (min) | 700 MPa (SS304) / 800 MPa (SS316) | 700 MPa (SS304) | 800 MPa (SS316) / 1,200 MPa (Alloy) |
| Yield Strength (0.2% offset) | โฅ 450 MPa | โฅ 450 MPa | โฅ 600 MPa (SS316) / โฅ 1,080 MPa (Alloy) |
| Hardness (HRB / HRC) | HRB 80-95 | HRB 80-90 | HRB 95-105 / HRC 32-38 (Alloy) |
| Corrosion Resistance | โญ Excellent (Pass 72h Salt Spray) | โญ Excellent (Pass 72h Salt Spray) | โญ Excellent (SS) / โญโญ Premium (SS316L) |
| Certifications | ISO 9001, CE, RoHS, FCC | ISO 9001, CE, RoHS | ISO 9001, CE, RoHS, FCC, ASTM F593 |
๐ Need a different thread, length, or coating? We offer custom OEM/ODM โ just send your drawing.
Real-world applications from our clients across automotive, agriculture, construction, and energy sectors.
5/16 stainless steel bolts used in tractor attachments. Result: 60% fewer rust-related returns compared to Grade 2 zinc.
5/8-11 bolt in suspension components. Client reported 27% faster torque consistency vs previous supplier.
5/32 bolt for light-gauge steel framing. 100% passed pull-out test at 4.2 kN โ exceeding building code.
5/16 stainless steel bolts (SS316) in solar racking. 25-year corrosion warranty โ no failures in 5+ years field data.
We don't just talk quality โ we prove it with real factories, real certifications, and real partners.

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๐ฑ Real conversations with real clients โ 95% satisfaction rate across 300+ projects.
Everything you need to know about ordering 5/16 stainless steel bolts, 5/32 bolt, and 5/8-11 bolt from Boen Fasteners.
We stock SS304, SS316, and SS316L. SS304 is ideal for general industrial use, while SS316/316L offers superior corrosion resistance for marine, chemical, and food-grade environments. Each batch comes with a material test certificate.
Our MOQ is flexible: 200 pcs for standard sizes, 500 pcs for custom lengths. Need less? Contact us โ we often accommodate trial orders for new clients.
Absolutely. We offer OEM/ODM for custom lengths from 1" to 12", and coatings including plain, zinc-plated, hot-dip galvanized, Dacromet, and PTFE. Just send your drawing or spec sheet.
We support FOB, CIF, DDP, and EXW. Standard stock orders ship in 7-10 days; custom orders in 15-20 days. We ship via sea, air, or express (DHL, FedEx, UPS) depending on your urgency.
Yes! We offer free samples (you pay shipping) for qualified buyers. Request up to 10 pcs of any standard size to test fit, torque, and corrosion performance before you commit.
We follow a 3-stage QC process: incoming material inspection, in-process dimensional check, and final lot sampling per ASTM F1470. Every shipment includes a Certificate of Conformance.
We accept T/T, L/C, PayPal, and Western Union for international clients. For first orders, we typically require 30% deposit and 70% against BL copy. Long-term clients may qualify for credit terms.
We work with regional partners in the US, Germany, UK, and Australia. We can also ship directly to your warehouse โ DDP service available for hassle-free customs clearance.
Hear from procurement and engineering leaders who use 5/16 stainless steel bolts, 5/32 bolt, and 5/8-11 bolt from Boen Fasteners.

"We switched to Boen for our 5/16 stainless steel bolts and saved 38% per unit compared to our previous distributor. The MTC certificates arrived with every batch โ no more compliance headaches. Highly recommended."

"We needed 5/8-11 bolt in SS316 for a solar farm project. Boen delivered 2 weeks ahead of schedule and the salt spray test passed 96 hours. Their DDP service made customs seamless. We've placed 4 repeat orders."

"The 5/32 bolt we ordered for light steel framing was 100% consistent in thread fit โ zero rejects on site. Boen's QC is better than any Asian supplier we've used in 15 years. A true strategic partner."

"We use 5/16 stainless steel bolts in our tractor assembly line. Boen's 6-month stock holding program means we never run out. Their team is responsive, transparent, and genuinely cares about quality."

โ๏ธ About the Author
James Whitfield โ Senior Fastener Engineer & Supply Chain Strategist
James has 14 years of experience in industrial fastener manufacturing and procurement across Asia and Europe. He has overseen quality systems for over 8,000 metric tons of bolting products shipped to 40+ countries. James is a certified ISO 9001 lead auditor and regularly contributes to fastener standardization forums. He currently leads technical sales at Handan Boen Fastener Manufacturing Co., Ltd.
Get factory-direct pricing on 5/16 stainless steel bolts, 5/32 bolt, and 5/8-11 bolt โ with free samples, 10-day delivery, and full compliance support.
๐ง Email us directly:
shuan@fastenboen.com | mary@fastenboen.com | grace@fastenboen.com | stella@fastenboen.com
โ Free samples available โ ISO 9001 โข CE โข RoHS โข FCC โ 30+ countries served โ 10+ years of export expertise
๐ Hanguang Industrial Park, Yongnian District, Handan City, Hebei Province, China ๐ Daily 09 am - 05 pm