Value Collection 204080B Hex Cap Screw 1/2-13 316 Ss

Product Description

The VALUE COLLECTION 204080B is a hex head cap screw designed for fastening applications that require corrosion resistance and dimensional stability. Sized at 1/2-13 x 3-1/2 inches and manufactured from Grade 316 stainless steel, this fastener delivers solid performance in wet, marine, chemical, or outdoor environments where inferior grades would corrode prematurely. The UNC thread form and partial threading configuration allow for controlled engagement depth in through-bolt and clearance-hole applications. Installed by millwrights, pipefitters, plumbers, and general tradespeople, this screw arrives uncoated to preserve its base metal properties for direct use or secondary finishing.

This fastener is suited for residential and commercial applications where Grade 316 stainless steel is specified, including plumbing equipment mounting, pump and pipe support hardware, marine hardware, food-service equipment assembly, and chemical processing installations. The partial threading allows the unthreaded shank to pass cleanly through a clearance hole before engaging the threaded bore or nut, making it appropriate for lap joints and structural connections requiring a precise grip length.

Key Features

• Grade 316 stainless steel construction provides superior corrosion resistance compared to Grade 304, including resistance to chlorides and acids
• 1/2-13 UNC thread size with partial threading for versatile through-bolt and clearance-hole use
• 3-1/2 inch length under head accommodates thicker stack-ups and structural connections
• Uncoated finish preserves dimensional tolerances and is compatible with secondary coatings or sealants
• Standard hex head accepts common 3/4 inch hex wrenches and sockets for straightforward installation

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application specifying a 1/2-13 UNC fastener in Grade 316 stainless steel.

Installation Notes

Install using a calibrated torque wrench to the specification required by the joint design or applicable code. Lubricate threads with an anti-galling compound appropriate for stainless steel to prevent thread seizure during installation, a common issue with austenitic stainless fasteners under high torque. Ensure mating threads or nuts are also Grade 316 or a compatible stainless alloy to avoid galvanic corrosion. Follow applicable mechanical and structural codes for fastener torque class and joint preload requirements.