Value Collection 3SSC908F0300 Hex Head Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 3SSC908F0300 is a hex head cap screw intended for general mechanical and structural fastening applications. It features a 1/2-20 UNF thread form with a 3-inch length under the head and a 3/4-inch hex drive. Constructed from Grade 18-8 stainless steel with no additional coating, this fastener delivers corrosion resistance suitable for environments where mild chemical exposure or moisture is a concern. The shank is partially threaded, allowing it to bear shear loads along the unthreaded portion while clamping through the threaded engagement zone. Machinists, maintenance technicians, pipefitters, and plumbers commonly use this type of fastener when stainless-grade hardware is specified by a design or code requirement.

This cap screw is suited for use in fabrication, equipment assembly, piping support, and mechanical system mounting where 1/2-20 UNF thread engagement is required. The 18-8 stainless steel construction makes it a practical choice for indoor and outdoor installations exposed to water, mild chemicals, or temperature cycling. It is sold individually but subject to a minimum order quantity of 5 pieces per order.

Key Features

• 1/2-20 UNF thread form for fine-thread engagement and vibration resistance
• 3-inch length under head with partial thread — allows shear load distribution along the unthreaded shank
• Grade 18-8 stainless steel construction for corrosion resistance without coating
• 3/4-inch hex drive compatible with standard hex wrenches and sockets
• Uncoated finish — no risk of coating delamination in high-cycle or high-temperature adjacent service

Compatibility

Designed as a standard 1/2-20 UNF hex head cap screw for use in any application requiring a partially threaded, Grade 18-8 stainless steel fastener of this thread size and length.

Installation Notes

Installation should be performed by a qualified mechanic, pipefitter, or technician following applicable fastener torque specifications for 1/2-20 UNF stainless steel hardware as defined by the relevant design standard or equipment manufacturer. Use a properly sized 3/4-inch hex wrench or socket to avoid rounding the drive surfaces. Exercise caution when torquing 18-8 stainless fasteners into stainless mating threads to prevent galling — apply an appropriate anti-seize compound as needed. De-energize or isolate any equipment before fastener removal or installation in live mechanical assemblies.