Electro Hardware MS1003M01F21F Circuit Board Spacer M4

Product Description

The ELECTRO HARDWARE MS1003M01F21F is a round, female unthreaded circuit board spacer designed to create precise standoff clearance between a PCB and a mounting surface. Manufactured from brass with a zinc-plated finish per ASTM B633 and QQ-B-626 Comp 22 Type 1, this spacer delivers corrosion resistance suitable for electronics assembly environments. The metric M4 screw size, 2 mm overall length, 4.2 to 4.8 mm inside diameter range, and 6 mm outside diameter make it a compact, accurate solution for board-level hardware builds. Electronics assemblers, panel builders, and industrial electricians install this type of fastener during PCB mounting and enclosure assembly operations.

This spacer is suited for metric-fastener PCB assemblies in residential control boards, commercial electrical enclosures, and industrial panel applications where consistent board standoff height and secure mechanical support are required. The female unthreaded design accepts M4 hardware and is specified by engineers and technicians working within metric measurement systems. Its small form factor makes it appropriate for dense board layouts where space between mounting points is limited.

Key Features

• Brass construction with zinc-plated finish per ASTM B633 and QQ-B-626 Comp 22 Type 1
• M4 screw size, female unthreaded body for standard metric fastener compatibility
• 2 mm overall length with a length tolerance of -0.13 to 0.13 mm for consistent standoff height
• Inside diameter range of 4.2 to 4.8 mm with a tolerance of 0.000 to 0.270 mm
• 6 mm outside diameter, round body shape for stable seating on PCB mounting pads
• Minimum order quantity of 10 units for efficient project-quantity sourcing

Compatibility

Designed as a metric-standard round circuit board spacer for M4 fastener applications in PCB mounting and electronics enclosure assemblies.

Installation Notes

Installation is performed by electronics assemblers, panel builders, or licensed electricians during PCB mounting procedures. De-energize all circuits and discharge any stored energy before working inside enclosures. Use calibrated metric tooling to avoid over-driving and deforming the unthreaded bore. Follow applicable assembly documentation and any relevant NEC or IPC standards for electronic assembly workmanship.