Electro Hardware MMF1821M06F16M4 Hex Standoff M4x0.7

Product Description

The ELECTRO HARDWARE MMF1821M06F16M4 is a male-female hex circuit board standoff designed to create precise spacing and secure mechanical attachment between printed circuit boards or between a board and a mounting surface. Machined from aluminum alloy to QQ-A-225A Comp 2 specification, this metric standoff features an M4x0.7 thread on both ends and a 6 mm hex body for wrench engagement. The overall length is 24.53 mm, with a body length of 15.00 mm, a thread depth of 11.10 mm, and a thread length of 9.53 mm. The bright, uncoated finish leaves the aluminum surface bare, suitable for environments where anodizing or plating is not required. Electronics assemblers and field service technicians install these standoffs in control boards, enclosures, and panel assemblies.

This standoff is used in light commercial and residential electronics assemblies wherever M4-threaded metric hardware is specified. Common applications include HVAC control board mounting, electrical enclosure panel assembly, and general PCB stacking configurations. The hex body shape allows installation and removal with a standard open-end or socket wrench without the need for specialty tooling. A length tolerance of -0.150 mm to 0.150 mm ensures consistent stack height across assemblies. This part is sold individually with a minimum order quantity of 10 units.

Key Features

• M4x0.7 male-female thread configuration for board-to-board or board-to-panel standoff applications
• Hex body at 6 mm width across flats allows standard wrench installation
• Aluminum construction to QQ-A-225A Comp 2, material grade T3
• Bright uncoated finish - no secondary coating to affect dimensional tolerances
• Overall length of 24.53 mm with a tight length tolerance of plus or minus 0.150 mm
• Metric dimensioning throughout - compatible with metric-spec PCB and enclosure designs

Compatibility

Designed as an OEM-style metric standoff for use in assemblies specifying M4x0.7 thread pitch and 6 mm hex body geometry, including circuit board mounting applications in HVAC control panels and electrical enclosures.

Installation Notes

Installation is performed by electronics assemblers or field technicians using a standard open-end wrench or nut driver sized for 6 mm hex. Always de-energize and discharge any board or enclosure assembly before installing or removing standoffs. Avoid over-torquing aluminum standoffs, as the material is softer than steel and threads can be damaged by excessive force. Follow applicable enclosure and panel assembly standards for your application.