Value Collection -33717-51/2 Hex Socket Cap Screw 1-8 Unc

Product Description

The VALUE COLLECTION -33717-51/2 is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Manufactured from alloy steel with a black oxide finish, this fastener delivers solid corrosion resistance and reduced light reflection in service environments. The screw features a 1-8 UNC thread size, a 5-1/2 inch length under head, and a 3/4 inch hex drive socket. It is partially threaded, which provides a smooth shank section for improved shear strength and precise clamping in bolted joint applications. Licensed machinists, millwrights, and maintenance technicians are the typical installers for this fastener class.

This hex socket cap screw is suited for use in machinery assembly, tooling fixtures, industrial equipment, and structural steel connections where a recessed drive and high tensile alloy construction are required. The partially threaded design is common in applications where the fastener passes through clearance holes before engaging a tapped bore, ensuring proper joint clamping without thread engagement in the shear plane. It conforms to ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for precision and load-bearing fastening work.

Key Features

• 1-8 UNC thread size for use with standard coarse-thread tapped holes
• 5-1/2 inch length under head accommodates deeper fastening applications
• 3/4 inch hex socket drive for use with standard hex keys or socket drivers
• Partially threaded shank improves shear strength and joint clamping performance
• Alloy steel construction meets ASTM A574 high-strength fastener requirements
• Black oxide finish provides mild corrosion resistance and low-glare appearance

Compatibility

Designed as an OEM-style replacement or general-use fastener for machinery, fixtures, and structural assemblies requiring a 1-8 UNC partially threaded hex socket cap screw conforming to ASME/ANSI B18.3 and ASTM A574 standards.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a 3/4 inch hex key or socket driver. Always verify that the mating tapped hole is clean, properly sized, and free of debris before driving the fastener. Apply appropriate thread lubricant or anti-seize compound as required by the application specification. Do not exceed the rated torque for the fastener grade and thread size as defined in applicable ASME or ASTM standards.