Electro Hardware MM1305M06-MSC Hex Standoff 4-40 3/16 in

Product Description

The ELECTRO HARDWARE MM1305M06-MSC is a male-male hex circuit board standoff designed to create fixed spacing between PCBs and mounting surfaces in electronic assemblies. Machined from aluminum alloy to material grade T3 and finished with a clear coating, this standoff meets the QQ-A-225A Comp 2 fastener standard. It features a 4-40 threaded stud on each end, a hexagonal body that accepts a standard wrench or nut driver, and an overall length of 3/16 inches with a width across flats of 3/16 inches. The light weight of the aluminum construction makes it well suited for tight PCB stacks where mass and corrosion resistance both matter.

This standoff is used in residential and commercial electronic control assemblies, HVAC control boards, industrial PCB housings, and general electrical enclosures where a 4-40 thread pattern is specified. It is installed by electronics technicians, HVAC controls specialists, and electrical panel builders who need a reliable, low-profile spacer to separate and secure circuit boards at a defined standoff height. The hex body allows installation and removal with standard tooling without requiring adhesives or special fixtures.

Key Features

• Male-male threaded configuration accepts 4-40 fasteners on both ends for board-to-board or board-to-chassis stacking
• Hexagonal body shape allows wrench or nut driver engagement for torque-controlled installation
• Aluminum construction with T3 material grade provides lightweight strength and corrosion resistance
• Clear finish preserves the natural aluminum appearance and provides basic surface protection
• Meets QQ-A-225A Comp 2 fastener standard for verified material and dimensional compliance
• Length tolerance held to plus or minus 0.005 inches for consistent PCB stack height

Compatibility

Designed as a direct-fit replacement or service standoff for any circuit board assembly that specifies a 4-40 male-male hex standoff with a 3/16-inch overall length and 3/16-inch width across flats in the inch measurement system.

Installation Notes

Power down and discharge all capacitors in the circuit board assembly before handling or replacing standoffs. Use a correctly sized nut driver or open-end wrench matched to the 3/16-inch hex flats to avoid rounding the body. Do not overtighten against PCB mounting holes, as aluminum threads can strip under excessive torque. Follow applicable electrical codes and the board manufacturer's assembly guidelines when servicing control board hardware.