Value Collection 33674 Hex Socket Cap Screw 1/2-13 Unc

Product Description

The VALUE COLLECTION 33674 is a partially threaded hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and construction assemblies. Manufactured from alloy steel with a black oxide finish, this screw measures 4 inches in length under the head and is driven with a 3/8 inch hex key. The 1/2-13 UNC thread pattern conforms to ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for applications that demand reliable tensile strength and dimensional consistency. The black oxide coating provides mild corrosion resistance and reduces light reflection in exposed installations.

This cap screw is used in general mechanical assembly, equipment fabrication, machine mounting, and structural fastening where socket drive access is limited or torque control is required. Its partial threading allows for controlled clamping load distribution, making it appropriate for through-bolt and tapped-hole configurations in metal assemblies. Machinists, millwrights, maintenance technicians, and fabricators typically install this fastener in both shop and field settings.

Key Features

• 1/2-13 UNC thread size for broad compatibility with standard tapped holes
• 4 inch length under head for deeper engagement in thick stock or stacked assemblies
• Partially threaded shank for controlled clamping and shoulder bearing applications
• 3/8 inch hex drive for use with standard Allen keys and hex bit drivers
• Alloy steel construction meets ASTM A574 for high tensile strength requirements
• Black oxide finish provides mild corrosion resistance and a low-reflectance surface

Compatibility

Designed as a standard replacement or stock fastener for applications requiring 1/2-13 UNC partially threaded socket cap screws conforming to ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation should be performed by qualified technicians using a calibrated torque wrench and the appropriate 3/8 inch hex key or bit. Ensure the mating tapped hole is clean, properly sized, and free of debris before driving the fastener. Do not exceed the rated torque for the thread size and material class. Apply thread lubricant or anti-seize compound only where specified by the assembly drawing or equipment manufacturer.