Electro Hardware MM1405M12-MSC Hex Standoff 4-40 3/16in Steel

Product Description

The ELECTRO HARDWARE MM1405M12-MSC is a male-male hex circuit board standoff designed to space and mount printed circuit boards within electronic enclosures and control assemblies. Threaded 4-40 on both ends, this standoff allows boards to stack or mount to a panel with secure, symmetrical fastening. The hex body profile simplifies installation and removal with standard tooling. Constructed from Grade 2 steel with a zinc-plated finish meeting QQ-S-633, it provides corrosion resistance in typical indoor environments. The overall length is 3/16 inches with a 1/4-inch width across flats, making it suited for compact, low-profile board mounting applications.

This standoff is used in residential and light commercial control panel assemblies, HVAC equipment boards, electrical enclosures, and general electronics manufacturing where PCB-to-panel or board-to-board spacing is required. The 4-40 thread size is a common standard in circuit board fastening, fitting a wide range of control board mounting applications encountered by HVAC technicians, electricians, and electronics assembly professionals. Its small form factor suits tight enclosures where minimal clearance is available between boards or between a board and a mounting surface.

Key Features

• Male-male threaded ends with 4-40 thread size for secure dual-side fastening
• Hex body shape allows wrench or nut driver engagement for installation and removal
• Grade 2 steel construction with zinc-plated finish meeting QQ-S-633 standard
• Compact 3/16-inch overall length for low-profile PCB mounting
• 1/4-inch width across flats compatible with standard hex tooling

Compatibility

Designed as an OEM-style replacement or new-installation fastener for circuit board assemblies using 4-40 threaded standoffs in standard inch-measurement mounting configurations.

Installation Notes

Installation is typically performed by electricians, HVAC technicians, or electronics assembly professionals working on control boards or panel assemblies. Power down all equipment and discharge any stored electrical energy before handling circuit boards or fasteners. Use a hex nut driver or appropriately sized wrench sized for 1/4-inch flats to seat the standoff without overtightening, which can strip the 4-40 threads or crack a PCB. Follow applicable NEC guidelines and equipment manufacturer instructions when working inside electrical enclosures.