Electro Hardware 1329M03F21440 Hex Standoff 4-40

Product Description

The ELECTRO HARDWARE 1329M03F21440 is a male-female hex circuit board standoff designed to create fixed spacing between PCBs or between a PCB and a mounting surface. The body is machined from brass and finished with a zinc plating that meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards. The standoff measures 1 inch in overall body length with a 3/16 inch width across flats and uses a 4-40 thread size. The male thread length is 3/16 inch and the female thread depth is 1/4 inch. Electronics assembly technicians, panel builders, and control board fabricators install these fasteners in board-level assembly work where consistent standoff height and secure thread engagement are required.

This standoff is suited for use in electronic control panels, industrial enclosures, HVAC control boards, and other applications that call for a compact inch-series hex standoff. The 4-40 thread size is a common machine screw standard used throughout low-voltage control board assemblies and embedded electronics. The hex body shape allows installation and removal with standard open-end or box wrenches and hex drivers, making it practical in both initial assembly and field service scenarios where board replacement or adjustment is needed.

Key Features

• Male-female hex configuration provides one threaded stud end and one threaded socket end for stacking or mounting PCBs
• Brass construction with zinc plating meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards
• 4-40 thread size with 3/16 inch male thread length and 1/4 inch female thread depth
• 1 inch overall body length with length tolerance of -0.005 to 0.005 inches for precise board spacing
• 3/16 inch hex width across flats fits standard nut drivers and wrenches used in panel assembly
• Minimum order quantity of 10 units supports small-batch assembly and field stocking needs

Compatibility

Designed as an OEM-style replacement or assembly component for applications using 4-40 inch-series machine screw threads in hex standoff configurations on circuit boards and electronic control panels.

Installation Notes

Always de-energize and lock out the control panel or circuit board assembly before installing or removing standoffs to prevent damage to board traces or electronic components. Use a correctly sized hex driver or open-end wrench on the 3/16 inch flats to avoid deforming the hex body. Do not overtighten — brass is a softer material and threads can strip if torque is excessive. Panel builders and electronics assembly technicians should follow applicable industry workmanship standards when mounting PCBs with standoffs.