Electro Hardware 1435M09F16-440 Hex Standoff 4-40

Product Description

The ELECTRO HARDWARE 1435M09F16-440 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 grade stainless steel with an anodized finish, this standoff meets the QQ-S-763 fastener standard. The hex body shape allows for wrench engagement during installation. Overall length is 0.6875 inches, body length is 0.5 inches, and the width across flats is 0.25 inches. The male thread and female thread are both sized at 4-40, with a thread length of 3/16 inch on the male end and a thread depth of 1/4 inch on the female end. Sold individually.

This standoff is used in electronic and electrical panel assemblies where circuit boards must be mounted at a fixed, controlled height above a chassis or secondary board. Typical applications include control boards, relay panels, and enclosure-mounted PCBs found in HVAC equipment, industrial controls, and electrical distribution assemblies. The 4-40 thread size is a standard UNC thread common in light-duty PCB hardware. The stainless steel construction and anodized finish provide corrosion resistance suitable for both indoor and light industrial environments. Licensed electricians and electronics technicians are the primary installers.

Key Features

• Male-female configuration allows stacking or direct board-to-chassis mounting with a single fastener type
• 18-8 and 303 stainless steel construction resists corrosion in light industrial environments
• Anodized finish provides additional surface protection
• Hex body shape enables wrench or socket tool engagement for secure torque
• Meets QQ-S-763 fastener standard for dimensional and material compliance
• Length tolerance held to plus or minus 0.005 inches for precise board spacing

Compatibility

Designed as a standard 4-40 male-female hex standoff for use in any PCB assembly or chassis mounting application requiring a 4-40 thread interface and a 0.6875-inch overall standoff height.

Installation Notes

Installation is typically performed by an electronics technician or licensed electrician during panel assembly or board replacement. De-energize the equipment fully before working on any circuit board mounting hardware. Use an appropriately sized hex wrench or socket on the 0.25-inch across-flats hex body to seat the standoff without overtightening the stainless steel threads. Avoid cross-threading the 4-40 male end into the mating board or chassis, as stainless steel fasteners are susceptible to galling if driven without proper thread engagement.