Value Collection -33708-31/2 Hex Socket Cap Screw 7/8-9

Product Description

The VALUE COLLECTION -33708-31/2 is a hex socket cap screw designed for high-strength bolted assemblies in industrial and mechanical applications. It features a 7/8-9 UNC thread and measures 3-1/2 inches under the head, with partial threading along the shank. The 3/4-inch hex drive accepts a standard hex key or socket driver. Manufactured from alloy steel with a black oxide finish, it provides good corrosion resistance and a consistent surface for high-load fastening. Licensed tradespeople and maintenance mechanics use this fastener in machine frames, equipment housings, and structural assemblies requiring a flush or recessed head profile.

This cap screw suits heavy-duty bolted connections in manufacturing, maintenance, and industrial construction settings. The 7/8-9 UNC coarse thread is a standard choice where vibration resistance and ease of assembly in field conditions are priorities. Its partial threading allows for shank engagement in clearance holes, making it well suited for tight-tolerance joints. The black oxide alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for demanding structural and mechanical fastening tasks.

Key Features

• 7/8-9 UNC coarse thread for reliable field assembly and vibration resistance
• 3-1/2 inches length under head with partial threading for shank-bearing clearance fits
• 3/4-inch hex socket drive compatible with standard hex keys and socket drive tools
• Alloy steel construction meeting ASTM A574 for high tensile strength
• Black oxide finish for moderate corrosion and wear resistance
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application requiring a 7/8-9 UNC partially threaded socket head fastener in alloy steel.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance professional using a correctly sized 3/4-inch hex key or socket drive tool. Ensure mating threads are clean and free of debris before assembly. De-energize or lock out any equipment before fastener service per applicable OSHA lockout/tagout procedures. Do not substitute a smaller drive size, as rounding the socket can compromise torque application and fastener integrity.