Value Collection R40664416 Hex Socket Cap Screw 4-40 Unc

Product Description

The VALUE COLLECTION R40664416 is a hex socket cap screw designed for precise fastening in tight-clearance applications where a standard external-drive fastener will not fit. Threaded 4-40 UNC, the screw measures 3/16 inches under the head with a 3/32 inch hex drive socket. It is manufactured from 18-8 stainless steel, offering solid corrosion resistance for both indoor and outdoor use. This fastener is well suited for instrument assembly, electrical panel work, HVAC component mounting, and light mechanical assemblies where a clean, low-profile cap-head fastener is required.

This screw is commonly used in residential and light commercial applications wherever 4-40 UNC threading is called out. Typical install scenarios include securing control boards, brackets, small electrical enclosures, sensor housings, and instrumentation panels. Technicians working in HVAC, electrical, and plumbing service regularly carry assorted socket cap screws of this type for field repairs and panel reassembly work.

Key Features

• 4-40 UNC thread for compatibility with standard small-fastener applications
• 3/16 inch length under head suits shallow-clearance mounting points
• 3/32 inch hex drive socket requires a standard hex key or Allen wrench
• 18-8 stainless steel construction resists corrosion in damp or outdoor environments
• Low-profile socket cap head sits flush and clean on finished panels

Compatibility

Designed as a standard 4-40 UNC hex socket cap screw suitable for any application specifying that thread size and a 3/16 inch under-head length in stainless steel.

Installation Notes

Installation requires a 3/32 inch hex key or T-handle Allen driver. Apply fastener torque by hand to avoid stripping the small-diameter thread. Do not use power drivers without a torque-limiting clutch, as 4-40 fasteners are prone to thread damage under excess torque. Confirm thread engagement in the mating component before seating the head fully.