Electro Hardware 1313M03F21440 Hex Standoff 4-40

Product Description

The ELECTRO HARDWARE 1313M03F21440 is a male-female hex circuit board standoff designed to create precise spacing between printed circuit boards or between a board and a mounting surface. The standoff features a 4-40 unified coarse thread on both the male and female ends, a hex body shape measuring 3/16 inches across the flats, and an overall body length of 0.5 inches. Constructed from brass with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, it provides corrosion resistance and reliable conductivity for PCB assembly applications. Minimum order quantity is 10 units.

This standoff is used in the assembly and stacking of printed circuit boards in electronic control panels, HVAC control boards, electrical enclosures, and similar low-voltage electronic assemblies. It is appropriate for residential and light commercial applications where boards require rigid, repeatable spacing. The male stud threads into an existing female receiver on one board while the female end accepts the next fastener or standoff in the stack, allowing modular board configurations. Technicians and panel builders working with 4-40 threaded hardware will find this a straightforward fit for standard PCB layouts.

Key Features

• 4-40 unified coarse thread on both male and female ends for standard PCB fastener compatibility
• Hex body shape at 3/16 inches across the flats for wrench or nut-driver installation
• Overall body length of 0.5 inches with a thread depth of 1/4 inch and thread length of 3/16 inch
• Brass construction with zinc-plated finish for corrosion resistance
• Meets ASTM B633 Type 1 and QQ-B-626 Comp 22 finish standards
• Length tolerance held to plus or minus 0.005 inches for consistent board spacing

Compatibility

Designed as a standard 4-40 male-female hex standoff for use in PCB assemblies and electronic enclosures requiring 1/2-inch board spacing with unified coarse thread fasteners.

Installation Notes

Installation is performed by panel builders or electronics technicians during board assembly or field replacement of control assemblies. De-energize all circuits completely before working on or near any circuit board. Use a nut driver or small wrench sized for 3/16-inch hex flats to seat the standoff without over-torquing, which can crack board mounting holes. Ensure mating threads are clean and free of debris before assembly to maintain accurate spacing tolerances.