Electro Hardware 1439M09F16-440 Hex Standoff 4-40 13/16 in

Product Description

The ELECTRO HARDWARE 1439M09F16-440 is a male-female hex circuit board standoff designed to create fixed spacing between printed circuit boards or between a board and a mounting surface. It features a 4-40 unified thread with a male threaded post on one end and a female threaded bore on the other, allowing boards to stack or attach securely. The body measures 0.625 inches in length with an overall length of 0.8125 inches. Machined from 18-8 and Grade 303 stainless steel with an anodized finish, it meets QQ-S-763 fastener standards. Electronics assemblers, PCB technicians, and panel-build electricians typically install these standoffs during board assembly or enclosure work.

This standoff is suited for use in electronic control panels, industrial enclosures, HVAC control board assemblies, and general circuit board mounting applications where corrosion resistance and precise board separation are required. The hex body allows installation and removal with a standard wrench or hex driver, making it practical in tight panel layouts. It is appropriate for both light commercial and residential electronic assemblies where a 4-40 threaded fastener pattern is specified.

Key Features

• Male-female hex configuration allows secure board-to-board or board-to-chassis stacking
• 4-40 unified thread on both male post and female bore
• Overall length of 0.8125 inches with a 0.625-inch hex body length
• 0.25-inch width across flats for standard wrench engagement
• 18-8 and Grade 303 stainless steel construction with anodized finish for corrosion resistance
• Meets QQ-S-763 fastener standard

Compatibility

Designed as a standard 4-40 threaded male-female hex standoff for use in circuit board assemblies, electronic enclosures, and control panel builds requiring inch-system fastener patterns.

Installation Notes

Install using a wrench or hex driver sized to the 0.25-inch width across flats. De-energize and discharge all circuits before handling or installing standoffs in live panels. Avoid over-torquing, which can crack PCB mounting holes or strip the fine 4-40 thread. Follow applicable NEC guidelines when installing standoffs inside electrical enclosures.