Electro Hardware S1339-M04-F16-K Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1339-M04-F16-K is a round, female unthreaded aluminum circuit board spacer designed to maintain precise standoff clearance between a PCB and a mounting surface. Built to a 3/16 inch overall length with a 0.257 inch inside diameter and a 0.500 inch outside diameter, this spacer accepts a 1/4 inch screw and provides a stable, uncoated aluminum body for electrical and mechanical separation. Manufactured from Aluminum Grade T3 to fastener standard QQ-A-225A Comp 2, it delivers consistent dimensional accuracy with a length tolerance of -0.005 to 0.005 inches and an inside diameter tolerance of 0.000 to 0.010 inches. Electricians, electronics technicians, and OEM assembly professionals install this type of hardware during control board mounting and panel assembly work.

This spacer is suited for use in residential and commercial control panel assemblies, HVAC circuit board mounting, and general electronics fabrication where a low-profile, precision-machined aluminum standoff is required. Its female unthreaded design allows a standard 1/4 inch fastener to pass through cleanly, making it appropriate for applications where through-bolting or machine screw mounting is used to secure PCBs to chassis, enclosures, or sub-panels.

Key Features

• Female unthreaded body accepts 1/4 inch screw for clean pass-through fastening
• Aluminum Grade T3 construction per fastener standard QQ-A-225A Comp 2
• Compact 3/16 inch overall length for low-profile PCB standoff applications
• 0.500 inch outside diameter provides stable contact surface on board or chassis
• Bright uncoated finish - no coating interference with electrical grounding paths
• Tight length tolerance of plus or minus 0.005 inches for consistent stack height

Compatibility

Designed as an OEM-style replacement or assembly component for circuit board mounting applications requiring a 1/4 inch thread size, round body, female unthreaded aluminum spacer in the inch measurement system.

Installation Notes

Installation is performed by electricians, electronics technicians, or qualified OEM assembly personnel. De-energize all circuits and discharge any stored voltage before handling or repositioning circuit boards. Use appropriately sized hand tools to seat the fastener without over-torquing, which can crack the PCB substrate or distort the spacer. Follow applicable NEC guidelines and equipment manufacturer procedures when mounting control boards inside electrical enclosures.