304 Stainless Steel UNC Pan Head Hex Socket Screws | Allen Bolts

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304 Stainless Steel UNC Pan Head Hex Socket Screws

Upgrade your fastening projects with these precision-made 304 Stainless Steel Button/Pan Head Hex Socket Screws in American Standard UNC threading. Whether you're assembling electronics, machinery, furniture, or DIY builds, these Allen drive bolts deliver reliable grip, corrosion resistance, and clean aesthetics every time.

Key Features

Material: Premium 304 stainless steel — rust-resistant, durable, and long-lasting
Drive Style: Hex socket (Allen key / hex wrench drive) for secure, cam-out-resistant tightening
Head Style: Round pan head for a low-profile, clean finish
Standard: American Standard UNC (Unified National Coarse) thread
Available Sizes: 2#-56, 4#-40, 6#-32, 8#-32, 10#-24, 1/4-20, 5/16-18
Customizable: Available in custom configurations to suit your specific needs

Size Reference Guide

Reading UNC sizing is simple. For example, 8#-32 × 1/2" means: thread diameter = 0.164 inch, thread pitch = 32 threads per inch, and thread length = 1/2 inch. Conversion tip: 1 inch = 25.4 mm.

Specifications

Material	304 Stainless Steel
Thread Standard	UNC (American Standard)
Drive Type	Hex Socket (Allen)
Head Type	Round Pan Head
Sizes	2#-56, 4#-40, 6#-32, 8#-32, 10#-24, 1/4-20, 5/16-18
Country of Origin	Made in China

Note: As with all manually measured hardware, slight dimensional tolerances may apply. Please refer to the actual product upon receipt. Thank you for your understanding.

Frequently Asked Questions

Q: What does UNC threading mean on these hex socket screws?

A: UNC stands for Unified National Coarse, the most common American Standard thread type. These UNC screws are designed for general-purpose fastening and are widely compatible with standard American nuts, inserts, and tapped holes.

Q: What Allen (hex) key size do I need to drive these screws?

A: The required hex key size varies by screw diameter. For example, smaller sizes like 2#-56 and 4#-40 typically use a 0.05"–1/16" hex key, while larger sizes like 1/4-20 and 5/16-18 use a 3/32"–3/16" hex key. Always match your Allen wrench to the socket size stamped or specified on the packaging.

Q: Are these screws corrosion-resistant for outdoor or humid environments?

A: Yes. Made from 304 stainless steel, these pan head hex socket screws offer excellent resistance to rust, oxidation, and corrosion, making them suitable for both indoor and outdoor applications in moderate environments.

Q: Can I order custom sizes not listed in the standard specifications?

A: Yes, these screws are available in custom configurations. Please contact us with your specific thread size, length, and quantity requirements and we'll do our best to accommodate your needs.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.

We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.