1/2 Inch Socket Head Cap Screw Dimensions & 1/4-20 Button | Buy
1/2 Inch Socket Head Cap Screw Dimensions & 1/4-20 Button Head Cap Screw โ Factory Direct
Stop overpaying for standard socket head cap screws. Get precise 1/2 inch socket head cap screw dimensions and 1/4-20 button head cap screw dimensions verified by ISO 9001 certified factory. Direct pricing, 10-day delivery, and full traceability.
๐ญ Handan Boen Fastener โ 120,000 sqm production base
Why Buyers Frustrated with Socket Head Cap Screw Suppliers
Whether you are sourcing 1/2 inch socket head cap screw dimensions for heavy machinery or 1/4-20 button head cap screw dimensions for precision assemblies, the same problems keep coming up. Here is what procurement managers tell us:
Hidden Price Inflation
Many distributors add 40-60% markup. A buyer recently paid $0.32/piece for a 1/2-13 x 1-1/2 socket head cap screw that costs $0.18 at factory price.
Inconsistent Dimensions
A major automotive OEM rejected a batch because the 1/2 inch socket head cap screw dimensions deviated by 0.008 inches โ exceeding their tolerance. Rework cost: $12,000.
Late Deliveries
Supply chain disruptions cause 4-6 week delays on standard fasteners. A construction firm in Texas lost $47,000 in downtime waiting for M10 socket head cap screws.
Missing Compliance Docs
Without proper certifications (CE, RoHS, ISO), your shipment can be held at customs. A European buyer paid โฌ3,200 in storage fees for uncertified fasteners.
Precision-Grade 1/2 Inch Socket Head Cap Screw & 1/4-20 Button Head Cap Screw โ Full Specifications
At Boen Fastener, every socket head cap screw is manufactured to ANSI/ASME B18.3 and DIN 912 standards. We provide full dimensional data for 1/2 inch socket head cap screw dimensions and 1/4-20 button head cap screw dimensions so you can verify fit before you buy.
๐ง 1/2-13 x 1-1/2 Socket Head Cap Screw
1/2 inch socket head cap screw dimensions per ASME B18.3
| Thread Size | 1/2-13 UNC |
| Length (L) | 1.500 in (38.1 mm) |
| Head Diameter (A) | 0.750 in (19.05 mm) |
| Head Height (H) | 0.500 in (12.70 mm) |
| Hex Socket Size | 3/8 in (9.53 mm) |
| Tensile Strength | 170,000 psi (Grade 8) |
| Material Grade | Alloy Steel 4140 / 316 SS |
๐ Tip: Always verify head height clearance when using socket head cap screws in counterbored holes.
๐ง 1/4-20 x 3/4 Button Head Cap Screw
1/4-20 button head cap screw dimensions per ASME B18.3
| Thread Size | 1/4-20 UNC |
| Length (L) | 0.750 in (19.05 mm) |
| Head Diameter (A) | 0.472 in (12.00 mm) |
| Head Height (H) | 0.191 in (4.85 mm) |
| Hex Socket Size | 5/32 in (3.97 mm) |
| Tensile Strength | 170,000 psi (Grade 8) |
| Material Grade | Alloy Steel / 304 SS / 316 SS |
๐ก Tip: Button head screws are ideal for low-profile applications where head clearance is limited.
Factory-Direct Pricing
Eliminate 3-4 layers of middlemen. Save 35-50% vs. distributors.
Full Traceability
Heat trace reports, material certs, and dimensional inspection data included.
10-Day Delivery
Standard sizes ship from stock. Custom lengths in 15-20 days.
OEM/ODM Capable
Custom head markings, platings, and packaging per your spec.
๐ Where These Fasteners Are Used
1/2 inch socket head cap screws secure harvester blade assemblies. 170,000 psi tensile ensures no failure under heavy load.
1/4-20 button head screws used in interior trim and electronic module mounts. Low-profile head prevents interference.
Socket head cap screws for hydraulic cylinder mounting. Zinc-plated finish provides corrosion resistance in outdoor environments.
Both sizes used in jigs, fixtures, and press tooling. Precise 1/2 inch socket head cap screw dimensions ensure repeatable clamping force.
Frequently Asked Questions About Socket Head Cap Screws
A: Per ASME B18.3, the head diameter is 0.750 in, head height is 0.500 in, and hex socket size is 3/8 in. The thread length is 1.500 in. We provide a full dimensional report with every batch.
A: Head diameter: 0.472 in, head height: 0.191 in, hex socket: 5/32 in. The button head design provides a low-profile, domed bearing surface. We stock these in alloy steel, 304 SS, and 316 SS.
A: Yes. We offer custom lengths from 0.500 in to 6.000 in. Minimum order quantity: 500 pcs. Lead time: 15-20 days. We also support custom platings: zinc, black oxide, hot-dip galvanized, and Dacromet.
A: All our fasteners are manufactured under ISO 9001:2015 certified processes. We provide CE, RoHS, REACH declarations, and material test reports (MTR) per EN 10204 3.1. UL recognition available for selected grades.
A: We offer FOB Tianjin, CIF, and DDP terms. For orders above $2,000, we cover sea freight. Average shipping time to US East Coast: 18-22 days. Express (DHL/FedEx) available for sample orders.
A: Absolutely. We provide free samples (up to 10 pieces) for qualified buyers. You only pay the shipping cost. Request samples via our contact form.
A: We accept T/T (bank transfer), L/C (Letter of Credit), PayPal, and Western Union. For first-time buyers, we typically require 30% deposit and 70% against copy of B/L.
A: 1/2 inch (12.7 mm) is slightly larger than M12 (12 mm). The 1/2-13 UNC thread has 13 threads per inch versus M12 x 1.75 metric pitch. We supply both inch and metric sizes. Always specify your standard when ordering.
What Our Customers Say About Boen Fastener
"We switched to Boen for our 1/2 inch socket head cap screws and saved 31% compared to our previous distributor. The 1/2 inch socket head cap screw dimensions matched exactly to our prints. First batch of 5,000 pieces arrived in 11 days."
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"The 1/4-20 button head cap screw dimensions were exactly as specified. We needed CE and RoHS docs for customs โ Boen provided certified paperwork within 24 hours. Very professional. Will order again."
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"Boen's socket head cap screws survive our tough conditions. The zinc plating withstands humidity and the tensile strength is consistent. We've ordered 12,000+ pieces across 3 shipments. Zero defects."
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"We needed custom head marking on 1/4-20 button head screws for our OEM line. Boen handled the OEM/ODM customization perfectly. The logo is crisp and the dimensions are consistent. Lead time was 18 days โ faster than promised."
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Ready to Order Your 1/2 Inch Socket Head Cap Screws?
Get factory-direct pricing on 1/2 inch socket head cap screw dimensions and 1/4-20 button head cap screw dimensions. Free samples, 24h quote, and full compliance docs.
Trusted by Engineering Teams Across 30+ Countries
๐ญ Automated cold forging line โ 120,000 pcs/day capacity
๐ ISO 9001:2015 certified quality management
โ CE / RoHS / REACH compliant
๐ UL recognized component
๐ฌ Real-time quotes and tech support โ average response time < 2 hours