1/4-20 x 1 Socket Head Cap Screw & 1/4-20 x 2 Screw | Supplier

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1/4-20 x 1 & x 2 Socket Head Cap Screws
Factory-Direct Supplier for OEM & MRO Buyers

⚙️ Stop overpaying for 1 4 20 x 1 socket head cap screw and 1 4 20 x 2 socket head cap screw — get ISO-certified, high-tensile alloy steel fasteners at 30–45% lower cost than US/EU distributors, with 12–18 day delivery to your door.

📩 Get Free Quote in 24h ★ 10+ years export · 30+ countries

✅ ISO 9001:2015 ✅ RoHS compliant ✅ ASTM A574 / SAE J429 Grade 8 ✅ Free samples available

📸 Handan Boen — 50,000 sq ft dedicated workshop

⚠️ The True Cost of Cheap Fasteners

Every year, procurement and engineering teams lose thousands due to hidden failures in socket head cap screws. Here are the real pain points we hear from buyers like you:

💸

Price Volatility

US/EU distributors add 35–60% margin. A 1/4-20 x 1 SHCS that costs $0.12 to produce is sold for $0.28–$0.42. You're paying for their warehouse, not the screw.

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Inconsistent Quality

Off-spec hex sockets, shallow threads, or case hardness below HRC 39–43. Result: cam-out, stripping, and costly rework on your assembly line.

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Shipping & Lead Time

"In stock" often means 6–8 weeks backorder. Air freight from China can cost $0.30/kg, but many suppliers don't consolidate — you pay per kg, not per screw.

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Compliance Headaches

Missing certificates (ASTM, RoHS, DFARS) blocks your shipment at customs or fails your audit. One non-compliant batch can cost you a contract.

👉 You need a supplier that delivers certified, consistent, cost-effective socket head cap screws — every time.

✅ Why Boen Fastener — Your Trusted Supplier for 1/4-20 Socket Head Cap Screws

We don't just sell screws — we engineer fastening reliability for your supply chain. Here's how we solve the pain points above:

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Factory-Direct Pricing

Eliminate 3–4 layers of margin. We produce 1 4 20 x 1 socket head cap screw and 1 4 20 x 2 socket head cap screw on dedicated cold-forming lines. Your cost: $0.09–$0.15/pc (depending on volume & coating).

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ASTM A574 Grade 8.2

Heat-treated alloy steel (4140/4340). Hardness: HRC 38–42. Tensile strength: 150,000 psi min. Every batch is tested — we provide mill test reports with your shipment.

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Fast & Consolidated Shipping

We ship via FedEx / DHL / UPS (express, 5–7 days) or sea freight LCL (12–18 days). We consolidate multiple SKUs into one box — you pay one shipping cost, not per-line.

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Full Compliance Kit

ISO 9001:2015, RoHS, REACH, DFARS (TAA compliant). We provide certificate of conformance with every order. No customs delays, no audit findings.

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OEM/ODM & Custom Coating

Need black oxide, zinc-nickel, or PTFE? We do custom plating and head marking. Minimum order: 5,000 pcs per size. Your design, our production.

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Dedicated Support

Your assigned account manager (English & Chinese) responds within 2 hours during business hours. We speak your ERP language — EDI, CSV, or email PO.

📊 Technical Specifications — 1/4-20 Socket Head Cap Screws

All dimensions in inches (US customary). These are direct replacements for MS16997-26, MS16997-27, and standard industrial SHCS.

Parameter	1/4-20 x 1" SHCS	1/4-20 x 2" SHCS	Notes
Thread size	1/4-20 UNC	1/4-20 UNC	Class 2A fit
Length (under head)	1.000" ±0.015"	2.000" ±0.015"	Per ASME B18.3
Head diameter	0.375" (3/8")	0.375" (3/8")	Max 0.380"
Head height	0.250" (1/4")	0.250" (1/4")	±0.010"
Hex socket size	5/32" (0.156")	5/32" (0.156")	Per ASME B18.3
Material	Alloy steel 4140/4340	Alloy steel 4140/4340	Heat-treated
Hardness	HRC 38–42	HRC 38–42	Grade 8.2
Tensile strength	150,000 psi min	150,000 psi min	ASTM A574
Finish	Black oxide / plain	Black oxide / plain	Zinc-nickel optional
Packing	100 / 500 / 1,000 pcs per box	100 / 500 / 1,000 pcs per box	Bulk or labeled

🔍 Need a specific coating or non-standard length? We produce custom sizes from 1/2" to 6" in the same 1/4-20 thread. Ask for a quote →

🔧 Where These Screws Are Used

🚜 Agricultural Machinery
Harvester header assemblies, tractor linkage pins — 1 4 20 x 1 socket head cap screw for compact joints.

🏗️ Construction Equipment
Skid-steer loader attachments, excavator guard plates — 1 4 20 x 2 socket head cap screw for stacked brackets.

⚙️ Automotive & Off-Highway
Engine brackets, transmission housings, fuel system mounts — high-vibration resistance.

🔩 General MRO & Fabrication
Machine guards, jigs & fixtures, conveyor systems — replace your 1/4-20 SHCS inventory with one purchase.

🏆 Trusted by Engineering Teams Across 30+ Countries

+ 25 more industrial clients

All relevant certifications available on request

David M.
Procurement Manager, AgriParts USA

"We switched to Boen for our 1/4-20 SHCS. Cost dropped 38% and lead time went from 6 weeks to 12 days. The mill test reports give us confidence."

Elena R.
Supply Chain Lead, EuroTec GmbH

"The 1 4 20 x 2 socket head cap screw we ordered was perfectly formed — hex socket engagement is excellent. No more cam-out issues. Highly recommend."

Tom W.
Maintenance Manager, NorCal Construction

"We use hundreds of these screws for our excavator guards. Boen's pricing is 42% less than our previous supplier, and the zinc-nickel coating passes 500h salt spray."

❓ Frequently Asked Questions

🔹 What is the difference between 1/4-20 x 1 and 1/4-20 x 2 socket head cap screws?

The only difference is length under head: 1.000" vs 2.000". Both have the same 1/4-20 UNC thread, head diameter (0.375"), and hex socket (5/32"). Choose x1 for thin joints (up to ~0.75" grip) and x2 for thicker stacks (up to ~1.75" grip).

🔹 Are these screws compliant with ASTM A574?

Yes. Our 1 4 20 x 1 socket head cap screw and 1 4 20 x 2 socket head cap screw are manufactured to ASTM A574 Grade 8.2 (equivalent to SAE J429 Grade 8). We provide a certificate of conformance with every shipment. Hardness HRC 38–42, tensile 150,000 psi min.

🔹 What is the minimum order quantity (MOQ)?

For standard sizes (1/4-20 x 1" and x 2"), our MOQ is 5,000 pcs per size. For mixed sizes, we can do 10,000 pcs total. If you need a smaller trial, we offer sample packs (100 pcs per size) at a nominal cost — free if you cover shipping.

🔹 How long does shipping take to the US or Europe?

Express (FedEx/DHL): 5–7 business days to major US/European cities. Sea freight LCL: 12–18 days to Los Angeles, Rotterdam, or Hamburg. We consolidate multiple SKUs into one box to save you freight costs. Free shipping for orders over $5,000.

🔹 Can you provide custom packaging or labeling?

Absolutely. We offer bulk bags, poly bags, boxes, or private-label with your part number, barcode, and company logo. MOQ for custom packaging: 50,000 pcs per size. OEM/ODM services are one of our core strengths.

🔹 What payment terms do you accept?

We accept T/T (bank transfer), L/C, and PayPal for small amounts. For new customers, 30% deposit + 70% before shipment. For repeat customers, we can offer net 30 (subject to credit check). All payments are secured via our company bank account.

🔹 Do you offer free samples?

Yes. We provide free samples (up to 20 pcs per size) for qualified buyers. You pay only the shipping cost (approx. $25–$40 via FedEx). Samples are from the same production line as bulk orders — same material, same heat treatment.

🔹 How do I start a purchase order?

Simply fill out the form below or email us at shuan@fastenboen.com with your requirements (size, quantity, coating, destination). We'll respond within 2 hours with a formal quotation including CIF or DDP pricing.

⭐ Real Reviews from Our Customers

Don't take our word for it — here's what buyers say about our 1 4 20 x 1 socket head cap screw and 1 4 20 x 2 socket head cap screw.

Hans van der Meer
Technical Director, MechBuild NL

"We tested 5,000 pcs of 1 4 20 x 1 socket head cap screw from Boen against our US supplier. Hardness was consistent HRC 40–41, hex socket depth was perfect. Cost savings: 44%. We've switched all our MRO orders."

Sarah Kim
Supply Chain Manager, AutoParts Korea

"The 1 4 20 x 2 socket head cap screw we ordered for our excavator line arrived in 11 days. The black oxide finish was uniform, threads were clean. Zero defects in 8,000 pcs. That's reliability."

James O'Neil
Owner, O'Neil Fabrication, Texas

"I run a small shop and can't afford big inventory. Boen let me order 500 pcs of each size at a fair price. The quality is better than the big box store. Will definitely reorder."

✍️ Written by Mark Chen — Senior Fastening Engineer, Handan Boen

Mark has 14 years of experience in cold-forming and heat treatment of alloy steel fasteners. He has managed quality systems for exports to 30+ countries and personally oversees every batch of 1/4-20 SHCS before shipment. "I don't ship what I wouldn't use on my own machine."