3/8-16 Flange Bolt & 3/8-16 x 1-1/4" Flange Bolt 3/8-16 x 3/4" Flange Bolt | Buy
3/8-16 Flange Bolt & 3/8-16 x 1-1/4" Flange Bolt 3/8-16 x 3/4" Flange Bolt | Buy
3/8-16 Flange Bolt & 3/8-16 x 1-1/4 Flange Bolt & 3/8-16 x 3/4 Flange Bolt โ Factory-Direct Pricing
โ๏ธ Stop overpaying for standard flange bolts. Get ISO-grade 3/8-16 flange bolts with full traceability, delivered in 15โ25 days โ no minimum order quantity barriers.
๐จ Why Most Buyers Regret Their Flange Bolt Sourcing
Inflated per-unit cost
Distributors mark up 30โ50% on standard 3/8-16 flange bolt SKUs. Your margin disappears.
Inconsistent lead times
One batch arrives in 10 days, the next takes 8 weeks. Production planners lose 12+ hours per month chasing orders.
Hidden quality defects
Heat treatment failures, thread chipping, wrong flange diameter โ 7% rejection rate on low-cost imports.
High shipping cost per unit
LTL freight for small quantities raises TCO by 18โ25%. Consolidation at origin is rarely offered.
๐ You need a direct manufacturing partner who delivers 3/8-16 x 1-1/4 flange bolt and 3/8-16 x 3/4 flange bolt with certified quality, consistent lead times, and consolidated freight.
โ Boen Fasteners โ Your 3/8-16 Flange Bolt Manufacturing Partner
From material chemistry to final torque inspection, every 3/8-16 flange bolt leaving our factory in Handan, China, meets ASTM A307 / SAE J429 Grade 5 requirements. Hereโs what makes us different:
Factory-Direct Value
Eliminate 2โ3 layers of middlemen. Save 22โ35% vs. distributor pricing on 3/8-16 x 3/4 flange bolt orders.
Full Material Traceability
Mill certificates, hardness reports, and plating thickness data included with every 3/8-16 x 1-1/4 flange bolt shipment.
Consolidated Logistics
Combine 3/8-16 flange bolt with other fasteners in one LCL container. Cut freight cost by 30%.
๐ Technical Specifications โ 3/8-16 Flange Bolt Family
| Parameter | 3/8-16 Flange Bolt | 3/8-16 x 1-1/4 Flange Bolt | 3/8-16 x 3/4 Flange Bolt |
|---|---|---|---|
| Thread Size | 3/8-16 UNC | 3/8-16 UNC | 3/8-16 UNC |
| Length (inches) | 1.00" โ 2.50" | 1.25" | 0.75" |
| Flange Diameter | 0.875" โ 0.890" | 0.875" โ 0.890" | 0.875" โ 0.890" |
| Grade / Material | Grade 5 / 1038H | Grade 5 / 1038H | Grade 5 / 1038H |
| Surface Finish | Zinc / HDG / Plain | Zinc / HDG / Plain | Zinc / HDG / Plain |
| Tensile Strength (min) | 120,000 psi | 120,000 psi | 120,000 psi |
๐ฌ All dimensions per ASME B18.2.1. Plating options: Zn (โฅ96h salt spray), HDG (โฅ1000h).
๐๏ธ Where These Bolts Deliver the Most Value
The 3/8-16 x 3/4 flange bolt is used extensively in tractor mower decks and tiller attachments. Our bolts reduce field failure by 41% (based on 2024 customer return data).
The 3/8-16 x 1-1/4 flange bolt is specified for chassis brackets and engine mounts. Zero PPM defects recorded in Q4 2025 for a Tier-1 supplier.
๐ Trusted by 30+ Countries โ Certifications & Factory Footprint
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๐ Supplying Global Industry Leaders
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โ Frequently Asked Questions โ 3/8-16 Flange Bolt Sourcing
๐น What is the difference between 3/8-16 x 1-1/4 flange bolt and 3/8-16 x 3/4 flange bolt?
The 3/8-16 x 1-1/4 flange bolt has a 1.25" grip length, ideal for thicker assemblies (e.g., chassis brackets). The 3/8-16 x 3/4 flange bolt (0.75") is used for thin-profile applications like mower decks. Both share the same thread pitch and flange dimensions.
๐น Can you provide PPAP Level 3 documentation for 3/8-16 flange bolt orders?
Yes. We routinely submit PPAP Level 3 with dimensional reports, material certs, and capability studies. Lead time for PPAP pack: 5 working days after sample approval.
๐น What is the minimum order quantity (MOQ) for 3/8-16 x 3/4 flange bolt?
For standard zinc-plated 3/8-16 x 3/4 flange bolt, MOQ is 5,000 pcs. For custom finishes or HDG, MOQ starts at 10,000 pcs. Sample orders (200 pcs) are available for qualification.
๐น How do you ensure corrosion resistance on 3/8-16 flange bolts?
Our standard zinc plating provides โฅ96 hours to white rust per ASTM B117. For outdoor/agricultural use, we recommend hot-dip galvanized (HDG) which achieves 1,000+ hours. We also offer Dacrometยฎ for high-corrosion environments.
๐น Do you offer custom packaging for 3/8-16 x 1-1/4 flange bolt?
Absolutely. We provide bulk bags, small boxes, polybags with barcode labels, and private-label cartons. Let us know your ERP part number, and we will match the label format.
๐น What is the typical lead time for 3/8-16 flange bolt to USA?
Production: 15โ20 days after deposit. Ocean freight to West Coast: 18โ22 days. Total door-to-door: 35โ42 days. Air express (DHL/UPS) for samples: 5โ7 days.
โญ What Our Customers Say About 3/8-16 Flange Bolt Orders
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Procurement Lead, AgroParts Mรฉxico
"We switched our 3/8-16 x 3/4 flange bolt supply to Boen. Rejection rate dropped from 5% to 0.2%. Their PPAP package saved us a full supplier audit. 22% cost reduction vs. our previous distributor."
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Supply Chain Manager, Midwest Equipment Co.
"The 3/8-16 x 1-1/4 flange bolt we ordered arrived 3 days early. Every batch comes with a detailed COA. Their logistics team consolidated our order with other fasteners, cutting freight costs by 31%."
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Technical Director, Nordic AgriTech AB
"We tested 5 suppliers for 3/8-16 flange bolt โ Boen had the best thread consistency and flange squareness. Their ISO 9001 and CE certifications made the compliance review easy. Now our standard spec."
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โ๏ธ Written by David Cheng โ Senior Fastener Engineer, Boen Fasteners
David has 14 years of experience in industrial fastener manufacturing and export. He has personally overseen the production of over 120 million flange bolts for global clients in automotive, agricultural, and construction sectors. He is a member of the Industrial Fasteners Institute (IFI) and regularly contributes to ASTM fastener standards discussions.
๐ Ready to Secure Your 3/8-16 Flange Bolt Supply?
Get factory-direct pricing on 3/8-16 x 1-1/4 flange bolt and 3/8-16 x 3/4 flange bolt. Free samples for qualified buyers โ limited to first 20 inquiries this month.
๐ Or call us: +86 15630072814 (Daily 09 am โ 05 pm, UTC+8) ยท Contact Form
โ 30-day money-back guarantee on first order ยท โ Free samples with approved credit ยท โ Privacy policy compliant with GDPR
