Electro Hardware MS1035M07F16F Circuit Board Spacer M4

Product Description

The ELECTRO HARDWARE MS1035M07F16F is a round, female unthreaded circuit board spacer machined from Grade 303 stainless steel to meet the QQ-S-763 fastener standard. It is designed to create precise standoff clearance between a printed circuit board and a mounting surface or between stacked boards. The spacer has an 18 mm overall length, a 6 mm outside diameter, and an inside diameter ranging from 4.2 mm to 4.8 mm, making it compatible with M4 screw hardware. The bright, uncoated finish maintains the natural corrosion resistance of 303 stainless. Electrical and electronics technicians typically install these spacers during board assembly, panel builds, or enclosure retrofits where dimensional accuracy and material integrity are required.

This spacer suits residential and commercial panel assemblies, control board mounting applications, and enclosure builds across HVAC, electrical, and industrial controls. It is used wherever an M4 fastener passes through a board standoff location and the installer needs a non-threaded female spacer to maintain consistent board-to-surface clearance. The tight length tolerance of -0.13 mm to 0.13 mm ensures consistent stack height across multi-point mounting configurations, which is critical in sensitive electronics assemblies.

Key Features

• Grade 303 stainless steel construction meets QQ-S-763 fastener standard for dimensional and material compliance
• 18 mm overall length with a tight length tolerance of -0.13 mm to 0.13 mm for consistent standoff height
• Inside diameter of 4.2 mm to 4.8 mm accommodates M4 screw hardware
• 6 mm outside diameter in a round body profile for compact board mounting footprint
• Female unthreaded design allows a fastener to pass through freely without thread engagement at the spacer
• Bright, uncoated finish retains inherent stainless corrosion resistance with no added coating to flake or outgas near sensitive electronics

Compatibility

Designed for use with M4 screw hardware in circuit board standoff and spacer applications where a female unthreaded, round stainless steel spacer meeting QQ-S-763 is specified.

Installation Notes

Installation is performed by electronics technicians or electricians during control board assembly or panel build-out. Power down and de-energize all circuits before placing or repositioning circuit boards. Use calibrated torque drivers when driving M4 fasteners through these spacers to avoid cracking the PCB substrate. Follow applicable NEC guidelines for enclosure wiring and board mounting in electrical panel applications.