Electro Hardware MMF1811M03F21M4 M4x0.7 Hex Standoff

Product Description

The ELECTRO HARDWARE MMF1811M03F21M4 is a male-female hex circuit board standoff designed to create precise spacing and secure mechanical connections between PCBs and enclosures or stacked board assemblies. The fastener features an M4 x 0.7 thread on both the male and female ends, an overall length of 19.53 mm, and a 6 mm hex body for wrench engagement. Constructed from brass with a zinc plating finish, it meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards. This standoff is installed by electronics assemblers, control panel technicians, and field service techs who need reliable, repeatable board-to-board or board-to-chassis spacing in metric fastener applications.

This standoff is suited for use in control panels, HVAC control board assemblies, electrical enclosures, and similar equipment where circuit boards require fixed separation from mounting surfaces or adjacent boards. The metric M4 x 0.7 thread pitch makes it appropriate for OEM equipment and aftermarket assemblies built to metric fastener standards. Its compact hex body allows installation in tight board layouts where clearance is limited. Sold individually per package with a minimum order quantity of 2 units.

Key Features

• M4 x 0.7 thread on both male and female ends for direct metric board-to-board or board-to-chassis stacking
• 6 mm width across flats allows standard hex wrench or nut driver installation
• Overall length of 19.53 mm with a 10 mm hex body length and 9.53 mm thread length
• Thread depth of 7.50 mm on the female end for secure thread engagement
• Brass construction with zinc plating resists corrosion in panel and enclosure environments
• Meets ASTM B633 Type 1 and QQ-B-626 Comp 22 finish and material standards

Compatibility

Designed for use in metric fastener assemblies requiring M4 x 0.7 male-female hex standoffs, including circuit board mounting applications in control panels and electrical enclosures.

Installation Notes

Installation is performed by electronics assemblers or control panel technicians using a 6 mm hex wrench or appropriately sized nut driver. De-energize and disconnect power to any circuit board assembly before installing or removing standoffs. Avoid over-torquing, as brass hardware is subject to thread damage if excessive force is applied. Follow applicable IPC assembly standards and enclosure manufacturer guidelines for standoff placement and spacing.