3/8-16 x 1/2 And 3/8-16 x 1 Socket Head Cap Screw | Factory
3/8-16 x 1/2 & 3/8-16 x 1 Socket Head Cap Screw Factory Direct
Stop overpaying for standard alloy steel socket heads. Get ASME B18.3 compliant 3/8-16 x 1/2" and 3/8-16 x 1" cap screws from a ISO 9001-certified Chinese factory â 30% lower cost than domestic distributors, with 15-day lead time and full traceability.
đĽ Why Your Current 3/8-16 x 1/2" & 1" Supply Hurts
Every year, mid-size OEMs and MRO buyers lose thousands due to these common frustrations:
40% price markup from multi-tier distributors. A 3/8-16 x 1 socket head cap screw that costs $0.12 at the factory becomes $0.21+ by the time it reaches your dock.
6-8 week lead times for custom lengths or bulk orders. Your production line stops because a simple 3/8-16 x 1/2" fastener is out of stock.
Inconsistent quality â batches that fail Rockwell hardness or have shallow drive sockets, leading to field failures and warranty claims.
High shipping & import friction â no single supplier that handles both half-inch and one-inch lengths, doubling your freight and customs paperwork.
đ You need a single, reliable factory source for both 3/8-16 x 1/2" and 3/8-16 x 1" socket head cap screws â with full traceability, competitive pricing, and fast delivery.
âď¸ Engineered for Reliability: Boen Fasteners Solution
Our 3/8-16 x 1/2 socket head cap screw and 3/8-16 x 1 socket head cap screw are manufactured on CNC cold-forming lines with real-time SPC control. Every batch is tested for hardness, tensile strength, and dimensional accuracy before shipment.
Factory-Direct Price
Eliminate 2-3 layers of markup. Save 30-45% vs. USA distributors on 3/8-16 x 1/2" and 1".
ASME B18.3 Compliant
Full dimensional and mechanical conformity. Class 8.8 / Grade 8 alloy steel, black oxide or zinc plated.
Combined SKU Logistics
Order both lengths on one PO. Reduce freight cost by ~25% and simplify customs clearance.
Full Traceability
Heat number, mill cert, and inspection report with every shipment. ISO 9001:2015 quality system.
đ Technical Specifications â 3/8-16 x 1/2" & 3/8-16 x 1" Socket Head Cap Screw
| Parameter | 3/8-16 x 1/2" | 3/8-16 x 1" | Standard |
|---|---|---|---|
| Thread Size | 3/8-16 UNC | 3/8-16 UNC | ASME B1.1 |
| Length (L) | 1/2" (12.7 mm) | 1" (25.4 mm) | ASME B18.3 |
| Head Diameter | 0.563" (14.3 mm) | 0.563" (14.3 mm) | ASME B18.3 |
| Drive Size (Hex) | 5/32" (3.97 mm) | 5/32" (3.97 mm) | ASME B18.3 |
| Material | Alloy Steel 40Cr / 4140 / 4037 | ASTM A574 / SAE J429 | |
| Hardness (HRC) | 38-42 HRC | Grade 8 | |
| Tensile Strength | ⼠150,000 psi | SAE J429 Grade 8 | |
| Available Finishes | Black Oxide, Zinc Plated (Clear/Yellow), HDG, Plain | ASTM B633 / ISO 4042 | |
đ Custom lengths, stainless steel (304/316), and special coatings available for OEM orders.
Agricultural Machinery
3/8-16 x 1" used in harvester header assemblies â 20% longer fatigue life vs. Grade 5.
Automotive Sub-Assemblies
3/8-16 x 1/2" for brake bracket mounts â zero defects reported in 2024 Q1-Q3 shipments.
Industrial Equipment
Used in conveyor systems and pressure jigs â consistent clamp load across batches.
â Frequently Asked Questions
Q: What is the difference between 3/8-16 x 1/2" and 3/8-16 x 1" socket head cap screws?
The only difference is length: 1/2" (12.7 mm) vs 1" (25.4 mm). Both have the same 3/8-16 UNC thread, head diameter, drive size, and Grade 8 strength. The 1/2" is ideal for thin-plate clamping, while the 1" is used for thicker assemblies.
Q: Do you offer these in stainless steel (304 or 316)?
Yes. We can manufacture 3/8-16 x 1/2" and 1" socket head cap screws in A2-304 or A4-316 stainless steel. MOQ for stainless is 2,000 pcs per size. Lead time approximately 18-22 days.
Q: What is the minimum order quantity (MOQ) for factory-direct pricing?
For standard 3/8-16 x 1/2" and 1" alloy steel socket head cap screws, MOQ is 5,000 pcs per size. For mixed sizes, we can combine them into one production run. Sample orders (200 pcs) are available at a small premium.
Q: How do you ensure the quality of 3/8-16 x 1/2" and 1" cap screws?
Every production lot undergoes: â Chemical analysis of raw material, ⥠Rockwell hardness test (38-42 HRC), ⢠Tensile test (âĽ150,000 psi), ⣠Dimensional inspection (head, length, thread per ASME B18.3), and ⤠Salt spray test for coated batches. A full inspection report is included with each shipment.
Q: What is the typical lead time and shipping cost to the USA?
Production lead time: 12-15 working days for standard sizes. Sea freight to Los Angeles or Long Beach takes approximately 18-22 days. For a typical 20' container (approx. 40,000 pcs of mixed lengths), shipping cost is around $2,800-$3,500 depending on port. We can arrange DDP terms if needed.
Q: Can I get a sample before placing a bulk order?
Absolutely. Free samples are available for qualified B2B buyers. You only pay the shipping cost (approx. $25-40 via DHL/FedEx). We'll send both 3/8-16 x 1/2" and 3/8-16 x 1" samples with hardness and dimensional data.
Q: Do you offer custom packaging, labeling, or kitting?
Yes. We provide custom poly bagging, barcode labeling, and bulk kitting (e.g., 100 pcs per bag). For OEM programs, we can apply your part number and branding. No extra charge for standard customization.
Q: What payment terms do you accept?
We accept T/T (30% deposit, 70% before shipment), L/C at sight, and PayPal for small orders. For established accounts, we can discuss net 30 terms (subject to credit approval).
â What Our Customers Say
Procurement Lead, UK-based machinery builder
"We tested 3/8-16 x 1" from three suppliers. Boen's quality was consistent batch to batch. The tensile test reports gave us confidence. Now our standard spec."
Supply Chain Manager, Agricultural OEM (Germany)
"The 3/8-16 x 1/2" screws are used in our harvester header brackets. Zero failures in 18 months. And the cost savings allowed us to reinvest in R&D."
Operations Director, Automotive Tier 1 (Michigan, USA)
"We consolidated both 1/2" and 1" lengths into one PO. Reduced our fastener spend by 37%. Grace (our account manager) is incredibly responsive."
Written by Liang Chen â Senior Application Engineer, Fastener Solutions
12 years in industrial fastener manufacturing and quality systems. Liang oversees technical compliance for all export orders at Boen Fasteners and has personally qualified over 200 fastener SKUs for North American and European buyers.
đ Ready to Secure Your Supply Chain?
Get a factory-direct quote for 3/8-16 x 1/2" and 3/8-16 x 1" socket head cap screws within 24 hours.
đŻ Limited-time offer: Free sample kit + priority production for first-time buyers who quote this page.
đ§ shuan@fastenboen.com | mary@fastenboen.com | grace@fastenboen.com | stella@fastenboen.com
đ Hanguang Industrial Park, Yongnian District, Handan, Hebei, China | Daily 09:00 â 17:00
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đ Trusted by Industry Leaders Worldwide
"We switched our MRO supply of 3/8-16 x 1/2" and 1" socket heads to Boen. 42% cost reduction and zero non-conformances in 8 months. The traceability reports alone save us hours of audit prep."
â James R., Supply Chain Manager, Industrial Equipment OEM (Texas, USA)