Electro Hardware 1447M09F16-440 Hex Standoff 4-40

Product Description

The ELECTRO HARDWARE 1447M09F16-440 is a male-female hex circuit board standoff designed to space and secure printed circuit boards within enclosures and electronic assemblies. Machined from 18-8 and Grade 303 stainless steel with an anodized finish, this standoff meets QQ-S-763 fastener standards. It features a 4-40 thread size, an overall length of 1.0625 inches, a body length of 0.875 inches, and a hex body measuring 0.25 inches across flats. The male end threads into a mounting surface or lower board while the female end accepts a machine screw from the board above, creating a rigid, measured standoff stack. Electricians, electronics technicians, and control board assemblers typically install these during panel builds and PCB mounting work.

This standoff is used in residential and commercial electronic enclosures, HVAC control panels, and industrial PCB assemblies wherever boards must be mounted at a fixed, controlled height above a chassis or another board. The 4-40 thread is a standard size across a wide range of control board mounting applications. The stainless steel construction and anodized finish resist corrosion, making this fastener suitable for environments where moisture or chemical exposure is a concern. It is sold individually and is suited for both original builds and maintenance replacement work.

Key Features

• Male-female hex configuration allows stacking of circuit boards at a controlled standoff height
• 4-40 thread size is widely compatible with standard PCB mounting hole patterns
• 18-8 and Grade 303 stainless steel construction for corrosion resistance
• Anodized finish provides additional surface protection
• Meets QQ-S-763 federal specification for stainless steel fasteners
• Length tolerance held to -0.005 to 0.005 inches for precise board spacing

Compatibility

Designed as an OEM-style replacement or new-installation fastener for circuit board assemblies using 4-40 machine screw thread patterns in standard hex standoff configurations.

Installation Notes

Installation is typically performed by electronics technicians or licensed electricians during control board assembly or replacement. De-energize all circuits and discharge any capacitors before working inside an enclosure. Use a properly sized hex driver or nut driver matching the 0.25-inch flats to avoid rounding the hex body. Do not over-torque the male threaded end into the mounting surface, as stainless fasteners are susceptible to galling.