Electro Hardware 4502-M07-F16 Captive Screw 4-40 Unc

Product Description

The ELECTRO HARDWARE 4502-M07-F16 is a slotted-drive captive screw threaded to the 4-40 UNC standard with a 17/32-inch length under head. Captive screws are retained in a mating panel or assembly so they cannot be fully removed during service, reducing the risk of dropped hardware in tight enclosures or equipment bays. The fastener is machined from 18-8 stainless steel and left uncoated, giving it solid corrosion resistance for use in electronics enclosures, control panels, and light mechanical assemblies. The 1/4-inch head diameter and 1/8-inch head height suit low-profile panel applications where clearance is limited.

This captive screw is suited to applications in electrical enclosures, instrumentation panels, HVAC control boards, and similar assemblies where a 4-40 UNC thread is specified and screw retention is required. The slotted drive accepts a standard flat-blade screwdriver, making it compatible with common field-service toolkits. It is appropriate for both original equipment manufacturing and field replacement in commercial and light industrial settings where stainless steel fasteners are preferred for their resistance to oxidation.

Key Features

• Captive design keeps the screw retained in the panel during removal, preventing loss in tight assemblies
• 4-40 UNC thread standard for compatibility with standard tapped panels and inserts
• 18-8 stainless steel construction provides corrosion resistance without a coating
• Slotted drive works with standard flat-blade screwdrivers
• 1/4-inch head diameter and 1/8-inch head height for low-profile panel installations
• Meets QQ-S-763 material standard for stainless steel fasteners

Compatibility

Designed as an OEM-style captive fastener for panels and enclosures tapped to the 4-40 UNC thread standard.

Installation Notes

Installation is performed by mechanical or electrical technicians working on control panels and enclosures. Power down and de-energize the enclosure before accessing internal fasteners. Use a properly sized flat-blade screwdriver to avoid cam-out damage to the slotted head. Follow applicable NEC guidelines when working inside energized enclosure assemblies.