Electro Hardware 4104M07F16 Captive Screw 4-40 Unc

Product Description

The ELECTRO HARDWARE 4104M07F16 is a slotted drive captive screw designed for use in panel assembly, enclosure, and equipment mounting applications where the fastener must remain attached to the workpiece after disengagement. It is manufactured from 18-8 stainless steel in an uncoated finish, providing solid corrosion resistance for general industrial and electronic enclosure service. The screw carries a 4-40 UNC thread standard and measures 27/32 inches in length under the head. Head diameter is 5/16 inches and head height is 3/16 inches. Typical installers include panel builders, electronics technicians, and field service technicians working on control enclosures and access panels.

This captive screw is suited for light-duty panel fastening tasks where repeated tool access is required without risk of losing the fastener. Common applications include instrument enclosures, electronic chassis, HVAC control panel doors, and similar assemblies where 4-40 UNC threaded hardware is specified. The slotted drive allows installation and removal with a standard flat-blade screwdriver, making it practical in confined spaces. The 18-8 stainless steel construction meets QQ-S-763 material standards, making it appropriate for environments where mild corrosion resistance is required without a plated or coated finish.

Key Features

• Captive design keeps fastener retained in panel or cover after disengagement, preventing loss during service
• 4-40 UNC thread for compatibility with standard light-duty threaded inserts and panels
• 18-8 stainless steel construction meets QQ-S-763 material standard
• Slotted drive accommodates flat-blade screwdrivers in tight access areas
• Uncoated finish suitable for applications where plating or coating is not required
• Compact head profile: 5/16 inch diameter, 3/16 inch height

Compatibility

Designed for use in assemblies calling for a 4-40 UNC captive screw with a slotted drive in 18-8 stainless steel. Verify thread engagement depth and panel thickness against the 27/32 inch under-head length before installation.

Installation Notes

Installation and removal should be performed with a properly sized flat-blade screwdriver to avoid damaging the slot. De-energize any control panel or enclosure before servicing fasteners on live equipment covers. Confirm that the mating threaded component or insert is rated for 4-40 UNC engagement. Do not over-torque; 18-8 stainless fasteners in small diameters are susceptible to galling if driven with excessive force or speed.