1 2 20 Flange Bolt & 1 2 Flange Bolt 1 2 Inch Flange Bolt | Maker
Eliminate costly joint failures & supply chain delays. Our 1 2 20 flange bolt series delivers certified SAE J429 Grade 8 strength, full traceability, and factory-direct pricing โ engineered for OEMs, distributors, and EPC contractors in North America & Europe.
๐ฆ Get Free Quote in 24h โ Factory DirectProcurement and engineering teams across the US & EU face the same recurring headaches:
A leading agricultural machinery OEM reported 12% rejection rate on imported 1 2 20 flange bolt lots due to pitch errors. Rework cost them over $47k per quarter.
Distributors pay 18โ25% premium for domestic 1 2 inch flange bolt stock, while low-cost offshore sources miss lead times 3ร more often. Both hurt your bottom line.
Without ISO 898-1 or SAE J429 compliance, your engineering team cannot approve the 1 2 flange bolt for safety-critical assemblies. Delays cascade.
Many suppliers require 10,000+ MOQ for 1 2 20 flange bolt sizes, forcing you to overstock or face stockouts. Neither is acceptable in 2026.
โฑ๏ธ These issues erode 5โ9% of procurement ROI annually. There is a better way.
Boen Fasteners delivers a complete range of 1 2 20 flange bolt and 1 2 flange bolt variants engineered to meet or exceed ASTM A325 / SAE J429 Grade 8. Every batch is third-party tested.
Eliminate 2โ3 layers of margin. Our 1 2 20 flange bolt saves 22โ35% vs. distributor networks.
Heat numbers, mill certs, and coating records on every 1 2 flange bolt lot. QC reports included.
Standard production for 1 2 inch flange bolt โ 15 days. Express air freight available in 5 days.
| Parameter | 1/2โณ-20 UNC Flange Bolt | 1/2โณ Flange Bolt (Fine) | 1/2โณ Flange Bolt (Coarse) |
|---|---|---|---|
| Diameter | 1/2โณ (12.7 mm) | 1/2โณ (12.7 mm) | 1/2โณ (12.7 mm) |
| Threads per Inch | 20 | 20 | 13 |
| Grade | Grade 8 (SAE J429) | Grade 5 / Grade 8 | Grade 5 / Grade 8 |
| Material | Alloy Steel 10B21 / 40Cr | Carbon Steel / Alloy Steel | Carbon Steel / Alloy Steel |
| Hardness (HRC) | 33โ39 | 33โ39 | 33โ39 |
| Tensile Strength (min) | 150,000 psi | 120,000 / 150,000 psi | 120,000 / 150,000 psi |
| Coating Options | Zinc / HDG / Dacromet / Geomet | Zinc / HDG / Dacromet | Zinc / HDG / Dacromet |
| Certifications | ISO 898-1, SAE J429, ASTM A325 | ISO 898-1, SAE J429 | ISO 898-1, SAE J429 |
A Kansas-based tractor manufacturer replaced their premium supplier with our 1 2 20 flange bolt and cut fastener cost by 31% while maintaining zero field failures over 18 months.
EPC contractors in the EU use our 1 2 inch flange bolt for steel-to-steel connections, benefiting from full EN 14399 compliance and batch traceability.
A Tier-1 suspension supplier qualified our 1 2 flange bolt after 200,000-cycle fatigue testing. Now 4M+ pieces shipped annually.
From conveyor systems to hydraulic presses, our 1 2 20 flange bolt is the standard choice for engineers who demand repeatable clamp load.
A 1 2 20 flange bolt has an integrated flange under the head that distributes clamp load over a wider area, eliminating the need for a separate washer. The "20" refers to 20 threads per inch (UNC). This design improves joint integrity and reduces assembly time.
We stock Grade 5 (SAE J429) and Grade 8 (SAE J429) for our 1 2 flange bolt range. Grade 8 offers 150,000 psi minimum tensile strength, ideal for high-stress applications. We also offer ASTM A325 for structural use.
Standard options: Zinc plating (clear/yellow/blue), Hot-Dip Galvanizing (HDG), Dacromet, and Geomet. For corrosion resistance in marine environments, we recommend Dacromet-coated 1 2 inch flange bolt โ 720+ hours salt spray.
Standard MOQ is 5,000 pieces per size. For trial orders or urgent projects, we offer a "Quick Start" program with 500-piece minimum at a small premium. Contact us for details.
Yes. Every shipment of 1 2 flange bolt includes a CoC (ISO 9001) and mill test reports upon request. Third-party inspection (SGS, TรV, Intertek) is available at cost.
Production: 15 working days. Sea freight to US West Coast: 18โ22 days. Air freight: 5โ7 days total. We also maintain a 1 2 inch flange bolt buffer stock for fast dispatch.
Absolutely. Our OEM/ODM capability allows custom flange diameter, head height, drive type (Torx, hex, socket), and under-head serrations. Submit your drawing for a feasibility review.
Standard: T/T (30% deposit, 70% before shipment). For established clients and repeat orders, L/C at sight or net 30/60 days can be considered. We also accept PayPal for small trial orders.

"We've been sourcing 1 2 flange bolt from Boen for 2 years. Their Grade 8 quality is consistent, and pricing is 28% below our previous supplier. Highly recommended."

"The technical documentation and traceability for their 1 2 20 flange bolt meet our strict TรV requirements. Zero non-conformances in 12 shipments."

"Quick turnarounds on urgent 1 2 inch flange bolt orders. The team at Boen understands our deadlines and always delivers on time."

โ๏ธ About the Author
James Liu โ Senior Fastener Engineer & Export Quality Lead
With 14 years in industrial fastener manufacturing and export compliance, James leads Boen's technical team in qualifying 1 2 20 flange bolt, 1 2 flange bolt, and 1 2 inch flange bolt for global OEMs. He holds certifications in ISO 9001 auditing and SAE fastener standards.
Limited-time: Free sample set (50 pcs) for first-time qualified buyers. ย |ย โณ Offer valid for next 14 days.
โ 100% quality guarantee or full refund ย |ย โ No minimum for trial orders
๐ง shuan@fastenboen.com ย |ย mary@fastenboen.com ย |ย grace@fastenboen.com ย |ย stella@fastenboen.com
Hanguang Industrial Park, Yongnian District, Handan City, Hebei Province, China
Trusted by Engineering Teams in 30+ Countries
10+ years of export expertise โ real factories, real certifications, real results.
๐ข Brands That Trust Our 1 2 20 Flange Bolt
"We switched our entire 1 2 20 flange bolt supply to Boen. Their quality consistency and on-time delivery outperformed our previous European supplier โ at 40% lower cost."
โ Marcos V., Supply Chain Director, Industrial Equipment Manufacturer, Spain