Electro Hardware MS1047M01F21F Circuit Board Spacer M4

Product Description

The ELECTRO HARDWARE MS1047M01F21F is a round, female unthreaded circuit board spacer designed for M4 screw applications in PCB mounting and electronic assembly work. Manufactured from brass with a zinc-plated finish meeting ASTM B633 and QQ-B-626 Comp 22 Type 1 standards, this spacer provides reliable standoff separation and electrical isolation between circuit boards and chassis surfaces. The overall length is 24 mm, the outside diameter is 6 mm, and the inside diameter ranges from 4.2 to 4.8 mm. It is installed by electronics technicians, industrial maintenance professionals, and electrical assemblers working on control panels, enclosures, and PCB assemblies.

This spacer is suited for metric M4 fastener systems in both commercial and industrial electronic assembly applications. It is commonly used in control board mounting, industrial enclosure builds, and OEM equipment manufacturing where consistent standoff height and secure board positioning are required. The metric dimensioning and standardized tolerances make it compatible with precision PCB layouts that demand repeatable spacing.

Key Features

• Female unthreaded body accepts M4 screws for straightforward PCB mounting
• Brass construction with zinc-plated finish meets ASTM B633 and QQ-B-626 Comp 22 Type 1 standards
• 24 mm overall length with tight length tolerance of -0.130 to 0.130 mm for consistent standoff height
• 6 mm outside diameter and 4.2 to 4.8 mm inside diameter with 0.000 to 0.270 mm ID tolerance
• Round body shape suits standard PCB mounting hole patterns
• Minimum order quantity of 10 units supports production and service volume needs

Compatibility

Designed for use with M4 metric fasteners in PCB standoff and circuit board mounting applications across industrial controls, electronic enclosures, and OEM equipment assemblies.

Installation Notes

Installation is performed by qualified electronics or electrical assembly technicians. Power down and de-energize all equipment before working on any circuit board or control panel. Use appropriate metric tooling for M4 hardware. Avoid overtightening fasteners through the spacer, as this can crack or deform the PCB mounting holes.