Value Collection 711138BR Shoulder Screw 3/4 in 4140 Alloy Steel

Product Description

The VALUE COLLECTION 711138BR is a shoulder screw machined from 4140 alloy steel, designed for precision-fit applications where a controlled-diameter shaft is required for pivoting, guiding, or bearing retention. The shoulder measures 0.75 inches in diameter and 1.25 inches in length, providing a smooth, unthreaded bearing surface. The threaded portion is 5/8-11 UNC, and the fastener is driven with a 3/8 inch hex socket. It arrives with an uncoated finish. Machinists, tool-and-die technicians, and maintenance mechanics use this type of fastener in jigs, fixtures, cams, and linkage assemblies where close-tolerance shaft diameters are critical.

This shoulder screw is suited for industrial, manufacturing, and maintenance applications requiring a hardened alloy steel fastener with a precise shoulder diameter. Typical installations include fixture plates, pivot points in mechanical assemblies, guide pin applications, and any setup where a smooth-shank interface between moving components is needed. The 4140 alloy steel construction offers good tensile strength and wear resistance, making it appropriate for moderate-to-high load environments. It meets ANSI B18.3 and ASME/ANSI B18.3 standards, as well as ASTM A574, ensuring dimensional and mechanical compliance for industrial use.

Key Features

• 0.75 inch shoulder diameter with a 1.25 inch shoulder length for accurate bearing surface fitment
• 5/8-11 UNC thread standard for secure thread engagement in standard tapped holes
• 3/8 inch hex socket drive for torquing with standard hex keys or socket drivers
• 4140 alloy steel construction provides strength and wear resistance under load
• Uncoated finish — suitable for use as-is or for post-installation surface treatment
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as a standard shoulder screw conforming to ANSI B18.3 and ASME/ANSI B18.3 dimensional specifications, suitable for use in any fixture, jig, or mechanical assembly that accepts a 5/8-11 UNC threaded hole and requires a 0.75 inch precision shoulder diameter.

Installation Notes

Installation is typically performed by machinists or maintenance mechanics using a 3/8 inch hex key or socket driver. Ensure the mating tapped hole is clean and dimensionally correct for 5/8-11 UNC threads before installation. Do not apply thread-locking compounds unless required by the specific application, as shoulder screws in pivot applications often require controlled torque and free rotation of mating components. Follow applicable facility or equipment manufacturer torque guidelines for the thread size and material.