Electro Hardware P517M07F16-440 Round Female Standoff

Product Description

The ELECTRO HARDWARE P517M07F16-440 is a round female standoff designed to create threaded spacers between PCBs, panels, and enclosures in electronics and electrical assemblies. Machined from 18-8 and Grade 303 stainless steel with a bright finish, this standoff meets QQ-S-763 federal standards for stainless steel fasteners. It features a 4-40 thread size, an overall length of 0.3125 inches (5/16 inches), and an outside diameter of 0.25 inches (1/4 inches). The fully threaded female design accepts 4-40 screws from both ends, making it suitable for stacking or panel-mount applications in tight assemblies.

This standoff is used in residential and commercial electrical panel fabrication, electronic enclosure builds, and instrument mounting. Typical applications include PCB standoff mounting, panel separation, and spacer installations where corrosion resistance is required. The stainless steel construction makes it appropriate for environments where moisture or cleaning agents may be present. Electricians, electronics technicians, and panel builders are the primary installers of this hardware type.

Key Features

• 4-40 fully threaded female configuration accepts screws from both ends
• 18-8 and Grade 303 stainless steel construction for corrosion resistance
• Meets QQ-S-763 federal specification for stainless steel fasteners
• Bright finish with tight length tolerance of -0.005 to 0.005 inches
• Compact 5/16 inch overall length suits dense or space-constrained assemblies
• Round body shape with 1/4 inch outside diameter for consistent fitment

Compatibility

Designed as a standard 4-40 threaded round female standoff compatible with assemblies requiring 4-40 fastener hardware and a 5/16 inch OAL spacing dimension.

Installation Notes

Installation is performed by electricians, electronics technicians, or panel builders using standard hand tools. De-energize all circuits before working inside panels or enclosures. Avoid over-torquing into PCB mounting holes, as stainless steel threads can gall if not lubricated or driven carefully. Follow applicable NEC guidelines when installing hardware inside electrical enclosures.