Value Collection 33601 Hex Socket Cap Screw 1/4-20 Unc

Product Description

The VALUE COLLECTION 33601 is a hex socket cap screw designed for secure fastening in mechanical, industrial, and light structural assemblies. It features a 1/4-20 UNC thread and a 3/16-inch hex drive, requiring an Allen key or hex bit driver for installation. The screw is fully threaded along its 5/8-inch length under the head, which distributes clamping load consistently from bearing surface to tip. Constructed from alloy steel with a black oxide finish, it offers solid tensile strength with moderate corrosion resistance in dry or lightly oiled environments. Licensed tradespeople and maintenance technicians across mechanical, HVAC, and equipment-service trades commonly use this fastener type in panel, bracket, and component mounting applications.

This screw is suited for residential and light commercial equipment assembly, machine component fastening, and general-purpose maintenance work where a recessed-drive cap screw is required. The 1/4-20 UNC thread is one of the most common coarse-thread sizes in North American mechanical applications, making this screw a practical stocking item for service vans and shop benches. It meets ASME/ANSI B18.3 and ASTM A574 standards, which define dimensional and mechanical property requirements for socket cap screws.

Key Features

• 1/4-20 UNC coarse thread for wide compatibility in standard North American tapped holes
• Fully threaded 5/8-inch length under head for maximum thread engagement in through-hole and shallow-tapped applications
• 3/16-inch hex socket drive for use with standard Allen keys or hex bit drivers
• Alloy steel construction meets ASTM A574 mechanical property requirements for socket cap screws
• Black oxide finish provides a low-reflectance surface and light corrosion resistance in controlled environments
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard 1/4-20 UNC hex socket cap screw for use in any application requiring an ASME/ANSI B18.3-compliant socket head cap screw of this thread size and length.

Installation Notes

Installation is performed with a 3/16-inch hex key or hex bit driver; avoid using worn or undersized drivers that can strip the socket. Ensure the mating tapped hole or nut meets 1/4-20 UNC thread specification before driving. De-energize or lock out any equipment before replacing or installing fasteners on powered assemblies. Do not exceed the rated seating torque for the thread size and material being fastened into, as alloy steel cap screws can strip softer base materials if over-torqued.