Electro Hardware MM1405M09-MSC Hex Standoff 4-40 3/16in

Product Description

The ELECTRO HARDWARE MM1405M09-MSC is a male-male hex circuit board standoff designed to create fixed spacing between PCBs, panels, or chassis layers in electronic assemblies. Threaded 4-40 on both ends, this standoff accepts mating hardware on each side to stack or mount boards without additional adapters. The overall length is 3/16 inches and the hex body measures 1/4 inch across flats, making it one of the more compact standoff sizes used in dense assemblies. Manufactured from 18-8 Grade 303 stainless steel with a passivated finish, the part resists corrosion and meets the QQ-S-763 fastener standard. Electronics technicians, panel builders, and PCB assembly professionals install these during chassis builds and board-level service work.

This standoff is suited for residential and commercial electronics assemblies, control panel construction, and PCB mounting applications where a 4-40 threaded male-male configuration is required. The compact 3/16-inch body length fits tight-clearance layouts common in HVAC control boards, small appliance electronics, and industrial enclosures. Its stainless steel construction makes it appropriate for environments where mild corrosion resistance is a factor, such as humid mechanical rooms or outdoor-rated enclosures.

Key Features

• Male-male 4-40 threaded ends for direct board-to-board or board-to-panel stacking
• 3/16-inch overall length suits compact, tight-clearance PCB assemblies
• Hex body profile at 1/4 inch across flats allows wrench-tightening for secure torque application
• 18-8 Grade 303 stainless steel construction with passivated finish for corrosion resistance
• Meets QQ-S-763 fastener standard for material and dimensional compliance
• Sold individually, compatible with standard 4-40 threaded fastener systems

Compatibility

Designed for use with standard 4-40 threaded fastener systems in circuit board mounting and panel assembly applications where a male-male hex standoff configuration is required.

Installation Notes

Installation is performed by electronics technicians or panel builders using a wrench or hex driver sized for a 1/4-inch across-flats hex body. Always de-energize and discharge any board or assembly before installing or removing standoffs to prevent electrostatic discharge damage or shock hazard. Verify thread engagement depth on both ends before torquing to avoid cross-threading on the mating 4-40 hardware. Handle stainless fasteners carefully to avoid galling during installation.