Value Collection 33605 Hex Socket Cap Screw 1/4-20 Unc

Product Description

The VALUE COLLECTION 33605 is a fully threaded hex socket cap screw designed for secure mechanical fastening in assemblies where a recessed drive is preferred. Sized at 1/4-20 UNC with a 1-1/4 inch length under head, this fastener is driven with a 3/16 inch hex key. It is constructed from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces light reflection. Machinists, millwrights, maintenance technicians, and general contractors use this style of fastener across a wide range of structural and mechanical assembly applications.

This screw is suited for use in machine assembly, jig and fixture fabrication, equipment maintenance, and general industrial applications requiring a flush or low-profile fastener head. The 1/4-20 UNC thread is one of the most common coarse-thread sizes in inch-standard mechanical work, making this fastener a practical stock item for shops and field service kits. It conforms to ASME/ANSI B18.3 and ASTM A574 standards, which define dimensional and mechanical property requirements for alloy steel socket cap screws.

Key Features

• 1/4-20 UNC coarse thread for broad compatibility with standard tapped holes
• 1-1/4 inch length under head with full threading along the entire shank
• 3/16 inch hex drive for use with standard hex keys or socket drive tools
• Alloy steel construction provides high tensile strength relative to fastener size
• Black oxide finish offers mild corrosion resistance and a low-glare appearance
• Meets ASME/ANSI B18.3 and ASTM A574 dimensional and mechanical standards

Compatibility

Designed as an OEM-style replacement or stock fastener for any application using 1/4-20 UNC tapped holes requiring a hex socket cap screw with a 1-1/4 inch grip length.

Installation Notes

Installation is performed using a 3/16 inch hex key or a matching socket bit; confirm the receiving hole is properly tapped to 1/4-20 UNC before driving. De-energize and lock out any equipment before replacing fasteners in live assemblies. Avoid overtightening, which can strip threads in softer base materials. Follow applicable mechanical codes and equipment manufacturer torque guidelines for the specific assembly.