Value Collection A997111 Shoulder Screw 5/16 in 1/4-20

Product Description

The VALUE COLLECTION A997111 is a hex socket shoulder screw manufactured from 4140 alloy steel in an uncoated finish. The shoulder measures 5/16 inches in diameter and 2-1/2 inches in length, with a 1/4-20 UNC thread. Drive engagement is via a 5/32-inch hex socket. The head stands 7/32 inches tall with a 7/16-inch diameter. This type of fastener is commonly installed by machinists, millwrights, and maintenance technicians as a precision pivot, guide, or spacer in mechanical assemblies. It conforms to ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards.

Shoulder screws of this configuration are used in a range of industrial and mechanical applications where a precise cylindrical bearing surface is required. Common use cases include linkages, jigs, fixtures, and tooling assemblies where controlled rotation or sliding motion along the shoulder is needed. The uncoated 4140 alloy steel construction provides strength and hardness suitable for demanding shop and field environments. Sold in a package quantity of 5 per order.

Key Features

• Shoulder diameter: 5/16 inches (0.3120 inches decimal) for precise fitment in bored or drilled pivot locations
• Shoulder length: 2-1/2 inches to accommodate thicker assemblies or stacked components
• 1/4-20 UNC thread provides broad compatibility with standard tapped holes
• 5/32-inch hex socket drive for use with standard Allen wrenches or hex bit drivers
• 4140 alloy steel construction meets ASTM A574 mechanical requirements
• Meets ANSI B18.3 and ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard shoulder screw replacement or new installation fastener for mechanical assemblies requiring a 5/16-inch shoulder diameter, 2-1/2-inch shoulder length, and 1/4-20 UNC thread in 4140 alloy steel.

Installation Notes

Installation is typically performed by a machinist or maintenance technician using a 5/32-inch hex key or Allen driver. Ensure the mating bore is properly sized to the shoulder diameter for correct fit and function. De-energize and lock out any equipment before fastener installation or removal. Do not use impact drivers on hex socket shoulder screws, as this may damage the drive recess or distort thread engagement.