1/2-13 Bolt & 1/2-20 Bolt 1/2 Bolt 1/2 Fine Thread Bolt | Maker
Precision 1/2-13 & 1/2-20 Bolts โ Factory-Direct Quality for Global Engineering
Eliminate costly supply chain risk and inconsistent quality with our certified 1/2 bolt and 1/2 fine thread bolt โ engineered for OEMs, construction, and heavy equipment.
๐ Handan, Hebei โ ISO 9001 certified
โ ๏ธ The True Cost of Compromising on 1/2 Bolt Quality
๐ง 1 2 13 bolt thread mismatch
UNC 13 TPI is standard for structural steel. Using a generic 1/2 bolt with wrong pitch leads to joint failure โ 23% of field failures in heavy equipment trace back to fastener mismatch.
๐ 1 2 20 bolt fatigue risk
Fine thread (UNF 20 TPI) offers higher tensile strength but needs precise manufacturing. Substandard 1/2 fine thread bolt can crack under cyclic load โ common in automotive suspension.
๐ Hidden logistics pain
Splitting orders across multiple suppliers increases freight cost by 18-35% and delays assembly. One trusted source for 1 2 13 bolt and 1 2 20 bolt cuts procurement overhead.
๐ Compliance & liability
Without CE, UKCA, or ASTM F568 traceability, a single 1/2 bolt recall can cost $50k+. Our batch-coded system ensures full chain of custody.
โ Why Boen Fastener Is Your Trusted 1/2 Bolt Manufacturing Partner
Powerful Factory, Direct Control
10+ years of export expertise. 30+ countries. Full in-house production of 1 2 13 bolt and 1 2 20 bolt โ no outsourcing, consistent quality.
Quality Assurance You Can Trust
ISO 9001, CE, RoHS, and ASTM F568 certified. Every 1/2 fine thread bolt batch is tested for hardness, tensile, and dimensional accuracy.
High-Speed Delivery
Stockhold of 1/2 bolt grades 2, 5, and 8. Typical lead time 7-15 days for standard 1 2 13 bolt and 1 2 20 bolt orders.
OEM/ODM Customization
Need a specific 1/2 fine thread bolt length or coating? Our engineering team supports from material selection to custom packaging.
๐ Technical Specifications โ 1/2-13 Bolt & 1/2-20 Bolt
| Parameter | 1 2 13 Bolt (UNC) | 1 2 20 Bolt (UNF) | Test Standard |
|---|---|---|---|
| Threads per inch | 13 TPI | 20 TPI | ASME B1.1 |
| Diameter | 1/2 inch (12.7 mm) | 1/2 inch (12.7 mm) | ASTM F568 |
| Grade options | 2, 5, 8, 304SS, 316SS | 2, 5, 8, 304SS, 316SS | SAE J429 / ASTM A193 |
| Tensile strength (min) | 120 ksi (Grade 8) | 150 ksi (Grade 8) | ASTM F606 |
| Coating options | Zinc, HDG, Dacromet, plain | Zinc, HDG, Dacromet, plain | ASTM B633 / ISO 4042 |
| Length range | 1/2" โ 12" | 1/2" โ 10" | per customer spec |
๐ All 1/2 bolt products are 100% dimensionally inspected and batch-traceable.
๐ ๏ธ Real-World Applications
๐ Trusted by Engineers & Procurement Teams Across 30+ Countries
"We switched our entire 1 2 13 bolt supply to Boen. Quality consistency improved and we cut 22% from fastener spend."
โ Procurement Lead, German Ag Equipment OEM
"Boen's 1/2 fine thread bolt meets our ASTM spec perfectly. Delivery is always on time."
โ Senior Engineer, US Construction Equipment Co.
"The factory-direct pricing on 1 2 20 bolt saved us 31% compared to our previous distributor."
โ Supply Chain Manager, UK Automotive Tier 1
โ Frequently Asked Questions About 1/2 Bolt Procurement
What is the difference between a 1 2 13 bolt and a 1 2 20 bolt?
The 1 2 13 bolt has 13 threads per inch (UNC โ coarse thread), while the 1 2 20 bolt has 20 threads per inch (UNF โ fine thread). Coarse thread is better for quick assembly and softer materials; fine thread offers higher tensile strength and better vibration resistance.
Can I use a 1/2 bolt interchangeably between UNC and UNF?
No. A 1/2-13 bolt will not fit a 1/2-20 nut. Always match the thread pitch. Boen labels every batch clearly to avoid mix-ups.
What grades are available for 1/2 fine thread bolt?
We supply Grade 2, Grade 5, and Grade 8 in carbon steel, plus 304 and 316 stainless steel. Each grade is certified to ASTM F568 or SAE J429.
What is the minimum order quantity for 1 2 13 bolt?
For standard 1/2 bolt sizes, MOQ is 2,000 pcs per size. For custom lengths or coatings, please contact our sales team to discuss.
Do you provide sample testing for 1 2 20 bolt?
Yes. We offer free samples for qualified buyers. You just pay shipping. Our team can also provide a dimensional report and material test certificate (MTC) with your sample.
How do you handle shipping for 1/2 bolt orders to Europe?
We ship via sea (FOB Tianjin or CIF to major ports) and air freight for urgent orders. Typical transit: 25-35 days sea, 5-8 days air. We handle all customs documentation.
What certifications do you have for 1/2 fine thread bolt?
ISO 9001:2015, CE, RoHS, and ASTM F568. We also provide batch-specific MTR (Material Test Report) upon request.
Can you customize the packaging for 1 2 13 bolt orders?
Absolutely. We offer private labeling, barcode labeling, and bulk packaging (boxes, bags, pallets) per your specification. No extra charge for standard branding.
โญ Real Reviews from Engineering & Procurement Professionals
Marcus Lindstrรถm
Procurement Manager, Volvo CE โข Sweden
"Weโve been sourcing 1 2 13 bolt and 1 2 20 bolt from Boen for two years. Their quality is consistent, and the pricing is 18% below our previous supplier. Highly reliable."
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Jennifer Park
Senior Engineer, Caterpillar โข USA
"The 1/2 fine thread bolt from Boen passed our 500-hour vibration test with zero failures. Their MTR documentation is thorough."
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David O'Connell
Supply Chain Director, UK Construction Ltd
"We consolidated all 1/2 bolt orders to Boen. Lead time is 10 days, and the cost savings let us reinvest in other areas. Excellent partner."
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Ahmed Al-Rashid
Operations Manager, Saudi Industrial Group
"Boen's 1 2 13 bolt and 1 2 20 bolt are now our standard. The quality is excellent, and the team is very responsive to our customization needs."
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โ๏ธ Written by Li Wei โ Senior Fastener Engineer & Export Specialist
Li Wei has 14 years of experience in fastener manufacturing and international trade at Handan Boen Fastener. He has personally overseen 400+ B2B bolt supply projects for clients in Europe, North America, and Southeast Asia. His technical insights come from daily work on the production line and collaboration with global engineering teams.
๐ Ready to Secure Your 1/2 Bolt Supply Chain?
Get factory-direct pricing, certified quality, and delivery you can count on. Free samples available for qualified buyers.
๐ 100% risk-free โ request samples, and we'll provide full spec reports. No minimum commitment.
