Inch Socket Head Cap Screw Dimensions & Low Head Screw | Supplier
🔩 Inch Socket Head Cap Screw Dimensions & Low Head Screw — Precision Fasteners for Global B2B Buyers
Stop guessing on thread fit & clearance. Get factory‑certified inch‑series socket cap screws with complete dimensional data, low‑head variants, and ISO/ASME compliance — delivered in 14–21 days.
Mismatched inch socket head cap screw dimensions
You ordered “#10‑24” but received parts that don’t fit your jig. 42% of offshore buyers report dimensional deviations on inch‑series fasteners.
Low head screw clearance surprises
Your assembly has only 0.12″ of overhead clearance. Standard cap screws won’t work, and your supplier doesn’t offer low‑head variants with published specs.
Hidden costs & logistics delays
Rejected batches, re‑inspection fees, and air freight for urgent replacements. $2,800+ average loss per non‑conforming fastener order.
Incomplete certification paperwork
Your compliance team needs material certs, traceability, and RoHS declarations — but most suppliers only provide a packing list.
⚙️ Inch Socket Head Cap Screw Dimensions — Full ASME B18.3 Range
We supply #0 through 1‑1/2″ inch socket head cap screws, plus low head socket head cap screw dimensions for tight‑clearance assemblies. Every lot is dimensionally verified with CMM reporting.
| Size (inch) | Threads per inch | A (head dia) max | H (head height) max | Low head H max | Drive hex size |
|---|---|---|---|---|---|
| #4‑40 | 40 | 0.183″ | 0.110″ | 0.085″ | 1/16″ |
| #6‑32 | 32 | 0.226″ | 0.138″ | 0.105″ | 5/64″ |
| #8‑32 | 32 | 0.270″ | 0.164″ | 0.125″ | 3/32″ |
| #10‑24 | 24 | 0.312″ | 0.190″ | 0.145″ | 1/8″ |
| 1/4″‑20 | 20 | 0.375″ | 0.250″ | 0.188″ | 5/32″ |
| 5/16″‑18 | 18 | 0.469″ | 0.312″ | 0.235″ | 3/16″ |
| 3/8″‑16 | 16 | 0.562″ | 0.375″ | 0.281″ | 1/4″ |
| 1/2″‑13 | 13 | 0.750″ | 0.500″ | 0.375″ | 3/8″ |
Low head socket head cap screw dimensions
Head height reduced 25–30% vs standard. Ideal for sliding rails, tight enclosures, and automotive sub‑assemblies.
Material & finish options
Alloy steel 12.9, 304/316 SS, 410 SS. Black oxide, zinc‑nickel, hot‑dip galvanized, or passivated.
Custom dimensions & DFM
Need a non‑standard head height or undercut? Our engineers respond with DFM feedback within 48h.
📍 Where these fasteners are used
❓ Frequently Asked Questions
📌 What are the exact inch socket head cap screw dimensions for #10‑24?
Per ASME B18.3, a #10‑24 socket head cap screw has a maximum head diameter of 0.312″, a maximum head height of 0.190″, and a hex drive size of 1/8″. The low‑head variant reduces head height to 0.145″ max. We provide full dimensional CMM reports with every shipment.
📌 Do you offer low head socket head cap screw dimensions in stainless steel?
Yes. We stock low‑head variants in 304 stainless (A2‑70) and 316 stainless (A4‑80). All dimensions match the reduced‑height specifications listed in our table above. Custom materials (e.g., 410 SS, 17‑4 PH) are available for OEM orders.
📌 What is the minimum order quantity for inch socket cap screws?
For standard inch socket head cap screw dimensions (sizes #4 through 1/2″), our MOQ is 1,000 pieces per size. For low‑head variants, the MOQ is 2,000 pieces. We offer sample orders (50–200 pcs) for qualification at nominal cost plus shipping.
📌 How do you ensure dimensional accuracy across production runs?
Every production lot is verified using a ZEISS CMM and Go/No‑Go gages. We follow ANSI/ASME B18.3.1M statistical sampling. A dimensional inspection report is included in the shipping documents. We also provide third‑party inspection (SGS, TÜV) upon request.
📌 What is the typical lead time for inch low head screws?
Standard sizes: 14–18 working days from order confirmation. Custom dimensions or materials: 21–28 working days. We offer express production (7 days) for urgent orders with a 15% surcharge.
📌 Do you provide certificates of conformance and material traceability?
Yes, always. Each shipment includes a Certificate of Conformance (C of C) per ISO 10474, plus a material test report (MTR) from the mill. We also provide RoHS, REACH, and conflict‑minerals declarations upon request.
📌 How do you handle shipping to USA or Europe?
We ship via DDP (Delivered Duty Paid) for most EU and US destinations — no surprise customs fees. Air freight (3–5 days) or sea freight (20–30 days) available. We also hold safety stock in Rotterdam and Chicago for repeat orders.
⭐ Real Reviews from Global Buyers
Mark van der Linden
Procurement Lead, Netherlands
“We use Boen’s inch socket head cap screws for our packaging machines. Zero defects in the last 6 shipments. Their low head screws saved us a full redesign of the clamping arm.”
Jennifer T.
Supply Chain Manager, USA
“The dimensional reports they provide are exactly what our QA team needs. Lead time was 16 days — 9 days faster than our previous supplier. Great communication from Grace.”
Luis Fernando
Operations Manager, Brazil
“We needed low head socket head cap screw dimensions for a solar tracker project. Boen provided the full spec sheet and samples in 10 days. Cost was 40% lower than local distributors.”
💬 Real‑time communication with our engineers
📱 We respond to technical queries within 2 hours during business hours (GMT+8).
✍️ Written by David Harrington
Senior Technical Writer & Fastener Application Specialist — 12 years in industrial fastener sourcing, former QA engineer at a Tier‑1 automotive supplier. I personally review every dimension table we publish.
🔗 This article is part of Boen’s Engineering Resource Library — data‑driven guides for B2B buyers.
🚀 Get Your Inch Socket Head Cap Screws — With Full Dimensional Data
Request a quote and receive a free sample kit (up to 5 sizes) plus a dimensional report for your review.
Handan Boen Fastener Manufacturing Co., Ltd. · Hanguang Industrial Park, Yongnian District, Handan City, Hebei, China · Daily 09:00–17:00 GMT+8
🏭 From Our Factory to Your Assembly Line
Trusted by engineering & procurement teams at:
“We switched to Boen for our #10‑24 inch socket head cap screws. Dimensional reject rate dropped from 12% to 0.8%. Their low head series also solved our clearance issue on the new actuator line.”
— Anders K., Senior Mechanical Engineer, Sweden