Value Collection R57001085 Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION R57001085 is a hex socket cap screw designed for fastening applications that demand corrosion resistance and reliable clamping strength. It features a 1/2-20 UNF thread size and measures 4.5 inches in length under the head. The drive is a 3/8-inch internal hex socket, suited for use with standard Allen keys or hex-bit drivers. Constructed from 18-8 stainless steel with a bright, uncoated finish, this fastener resists rust and oxidation in wet or chemically exposed environments. It is a general-purpose industrial fastener used across mechanical, HVAC, plumbing, and structural assembly work.

This cap screw is appropriate for applications requiring fine-thread engagement, including machine components, equipment frames, and system assemblies where vibration resistance is a factor. The UNF thread form provides tighter thread engagement per inch than coarse-thread equivalents, making it suitable for thinner materials or where precision torque control is needed. Installers in HVAC, plumbing, and general mechanical trades will find this screw well suited to panel, bracket, and component mounting tasks.

Key Features

• 1/2-20 UNF fine thread for tight engagement and vibration resistance
• 4.5-inch length under head for deep fastening applications
• 3/8-inch internal hex socket drive for standard Allen key or hex-bit use
• 18-8 stainless steel construction for corrosion and oxidation resistance
• Bright, uncoated finish — no plating buildup that can affect thread tolerance
• Single-piece packaging for individual replacement or small-lot use

Compatibility

Designed as a standard 1/2-20 UNF hex socket cap screw suitable for general mechanical assemblies, equipment frames, and structural fastening applications that require an 18-8 stainless steel fastener.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using a properly sized 3/8-inch hex key or hex-bit driver. Ensure the receiving thread is clean and free of debris before installation. Do not cross-thread — start fastener by hand before applying torque. Stainless steel fasteners are susceptible to galling; apply an appropriate anti-seize compound to the threads before installation to prevent thread seizure.