Electro Hardware MM1305M12-MSC Hex Standoff 4-40 3/16in Steel

Product Description

The ELECTRO HARDWARE MM1305M12-MSC is a male-male hex circuit board standoff designed to create fixed spacing between PCBs and chassis panels or between stacked circuit boards. Manufactured from Grade 2 steel with a zinc-plated finish meeting QQ-S-633 standards, this standoff delivers corrosion resistance suitable for indoor electronic assemblies. The fastener uses a 4-40 thread on both ends with a 3/16 inch overall length and a hex body shape measuring 3/16 inch across the flats. Electronics technicians and PCB assembly professionals install this type of hardware during board mounting and chassis assembly operations.

This standoff is suited for use in residential and commercial electronic control assemblies, automation panels, and circuit board mounting applications where a 4-40 threaded male-to-male connection is required. The compact 3/16 inch body length makes it appropriate for tight board-to-board or board-to-chassis spacing arrangements. It is sold individually and is compatible with standard 4-40 threaded hardware commonly found in electronic enclosures, control boards, and instrumentation assemblies.

Key Features

• Male-male thread configuration on both ends for board-to-chassis or board-to-board installation
• 4-40 thread size compatible with standard PCB mounting hardware
• Hex body shape allows installation and removal with standard nut drivers or hex wrenches
• Grade 2 steel construction with zinc-plated finish meeting QQ-S-633 specification
• Compact 3/16 inch overall length for minimal stack height in tight assemblies
• Length tolerance of -0.005 to 0.005 inches for consistent fitment

Compatibility

Designed as an OEM-style replacement or new-installation fastener for circuit board assemblies requiring 4-40 male-male hex standoffs with a 3/16 inch overall length.

Installation Notes

Installation is performed by electronics technicians or PCB assembly professionals. Power down and de-energize all circuits before working on any circuit board assembly. Use an appropriately sized nut driver or hex wrench matched to the 3/16 inch width across flats to avoid rounding the hex body. Follow applicable IPC assembly standards and the equipment manufacturer's torque guidelines when fastening to sensitive PCB substrates.