Electro Hardware 4105M07F16 Captive Screw 4-40 Unc

Product Description

The ELECTRO HARDWARE 4105M07F16 is a slotted-drive captive screw designed for secure panel fastening in assemblies where screw retention is required. Threaded to 4-40 UNC standards, this fastener features a 29/32-inch length under head and is manufactured from 18-8 stainless steel in an uncoated finish. The captive design prevents the screw from being fully removed during service, reducing the risk of dropped hardware in tight enclosures or rack-mounted equipment. With a head diameter of 5/16 inches and a head height of 3/16 inches, this screw suits compact panel applications where clearance is limited. Installation is straightforward for electrical and electronics technicians working with standard slotted drivers.

This captive screw is suited for use in electrical enclosures, control panels, rack assemblies, and light industrial equipment where 4-40 UNC threaded fasteners are specified. The 18-8 stainless steel construction provides corrosion resistance appropriate for indoor and light-duty applications. Technicians replacing or retrofitting panel hardware in HVAC control boxes, electrical cabinets, and similar assemblies will find this fastener a direct fit where 4-40 UNC slotted captive screws are called out by the OEM.

Key Features

• Captive design retains screw during disassembly, preventing loss in tight enclosures
• 4-40 UNC thread standard for broad compatibility with standard tapped panels
• 29/32-inch length under head for moderate panel stack depths
• 18-8 stainless steel construction for corrosion resistance
• Uncoated finish suitable for indoor panel and enclosure applications
• Meets QQ-S-763 specification for stainless steel fasteners

Compatibility

Designed as an OEM-style replacement captive screw for assemblies specifying a 4-40 UNC slotted-drive fastener with 29/32-inch length under head.

Installation Notes

Installation and removal should be performed by a qualified technician using a standard flat-blade screwdriver sized to the slotted head. De-energize any panel or enclosure before servicing fasteners on live electrical equipment in accordance with applicable NEC lockout/tagout procedures. Ensure the mating tapped hole is clean and free of debris before engaging the thread to avoid cross-threading the 4-40 UNC fastener.