Electro Hardware MMF1839M09F16M4 Hex Standoff M4x0.7

Product Description

The ELECTRO HARDWARE MMF1839M09F16M4 is a male-female hex circuit board standoff designed to create precise spacing between stacked PCBs or to mount a circuit board at a fixed height above a chassis or enclosure panel. Machined from grade 303 stainless steel with a bright, uncoated finish, this standoff meets the QQ-S-763 fastener standard. The M4 x 0.7 thread runs on both the male and female ends, and the hexagonal body allows secure tightening with standard hex tooling. Overall length is 33.53 mm (approximately 1.32 inches), with a body length of 24.00 mm and a width across flats of 6.00 mm. Electronics assemblers, enclosure builders, and field technicians working on control boards and panel assemblies install this hardware in both commercial and industrial environments.

This standoff is used wherever PCB stacking, board-to-chassis separation, or rigid PCB mounting is required. Typical applications include HVAC control board assemblies, electrical enclosure panel builds, industrial control panels, and custom electronics chassis work. The male thread engages a clearance hole or tapped feature on the mounting surface or lower board, while the female thread accepts a fastener from the upper board or cover panel. Its stainless steel construction suits environments where corrosion resistance and dimensional stability are priorities.

Key Features

• Grade 303 stainless steel construction meets QQ-S-763 fastener standard for corrosion resistance and dimensional consistency
• M4 x 0.7 thread on both male and female ends for metric fastener compatibility
• Hexagonal body profile (6.00 mm width across flats) allows installation and removal with standard hex wrenches or nut drivers
• Overall length of 33.53 mm with a body length of 24.00 mm provides reliable, consistent PCB standoff height
• Bright, uncoated finish preserves base material properties without added coating thickness variability
• Length tolerance of -0.150 to 0.150 mm ensures consistent stacking geometry across assemblies

Compatibility

Designed as an OEM-style metric hex standoff for circuit board assemblies requiring M4 x 0.7 threaded male-female fastener hardware with a 6.00 mm hex body profile.

Installation Notes

Installation is performed by electronics assemblers or electricians working on control panel and PCB assemblies. De-energize all circuits and discharge any stored energy in the assembly before installing or removing standoffs on live control boards. Use an appropriately sized hex wrench or nut driver matched to the 6.00 mm width across flats to avoid deforming the hex body. Do not overtighten against PCB mounting holes, as excessive torque can crack circuit board substrate material or strip the threaded engagement.