S-97768A441 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
• High-strength performance delivering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
• Precision shoulder alignment with tight diameter and length tolerances ensuring accurate component positioning and reduced assembly errors.
• Secure and easy installation featuring a knurled socket head and hex drive for superior grip and torque application without slippage.
• Durable thread integrity with Class 3A UNC coarse threads providing excellent engagement and vibration resistance.
• Broad regulatory compliance meeting ASME B18.3 standards, RoHS 3, and REACH for safe, quality-assured use in global markets.
• Optimized for heavy-duty use with Rockwell B55 hardness ensuring long-term durability and minimal wear in repetitive operations.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and strength challenges in industrial assemblies. The precision-machined 1/2" shoulder diameter with tight tolerances acts as a reliable pivot or bearing surface, eliminating misalignment in machinery, automotive, and aerospace components. Made from 18-8 stainless steel with a black oxide finish, it resists corrosion and oxidation, extending service life in humid or chemically exposed settings. The coarse UNC threads and Class 3A fit ensure quick, secure fastening, while the knurled socket head enhances tool grip for efficient maintenance. Ideal for high-stress applications, this screw supports rotational movements and axial loads, reducing downtime and improving operational safety.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards for precise engagement. Shoulder dimensions include a diameter of 1/2" (tolerance: -0.004" to -0.002") and length of 2" (tolerance: -0.005" to 0.005"), ensuring consistent performance. Manufactured in compliance with ASME B18.3 specifications, it is also RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting environmental and safety regulations for industrial use.