Electro Hardware 1451M09F16-440 Hex Standoff 4-40

Product Description

The ELECTRO HARDWARE 1451M09F16-440 is a male-female hex circuit board standoff designed to create precise spacing between PCBs and mounting surfaces in electronic assemblies. Machined from 18-8 and 303 stainless steel with an anodized finish, this standoff meets the QQ-S-763 fastener standard. It features a 4-40 thread size with a 1/4-inch thread depth on the female end and a 3/16-inch thread length on the male end. The hex body measures 1/4 inch across flats and has a body length of 1 inch, with an overall length of 1-3/16 inches (1.1875 inches). Electricians, electronics technicians, and panel builders install these standoffs during board mounting and enclosure assembly work.

This standoff is used in circuit board mounting applications where a controlled, secure standoff height is required between stacked PCBs or between a board and a chassis panel. The male-female configuration allows multiple standoffs to be threaded together or used in series for board stacking. Typical applications include control panel builds, industrial electronics enclosures, and HVAC control board assemblies. The stainless steel construction makes it suitable for environments where corrosion resistance is a factor.

Key Features

• Male-female hex configuration supports board stacking and chassis mounting
• 4-40 thread size with 1/4-inch female thread depth and 3/16-inch male thread length
• 18-8 and 303 stainless steel construction with anodized finish for corrosion resistance
• Overall length of 1.1875 inches with a length tolerance of -0.005 to 0.005 inches
• Hex body shape with 1/4-inch width across flats for standard wrench or socket installation
• Meets QQ-S-763 fastener standard

Compatibility

Designed as an OEM-style replacement or new-installation standoff for circuit board assemblies using 4-40 threaded hardware in inch-measurement systems.

Installation Notes

Power down all equipment completely before installing or removing circuit board standoffs. Use an appropriately sized hex wrench or nut driver sized for 1/4-inch across flats to avoid rounding the hex body. Do not overtighten, as stainless fasteners in threaded assemblies can gall if torque is excessive. Follow applicable electrical codes and manufacturer board-mounting guidelines when assembling control panels or electronic enclosures.