S-8077A741 1/2"-13 ASME B18.3 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 stainless steel and black oxide finish, ideal for harsh industrial environments
- Precise alignment and spacing ensured by the 3" shoulder with tight tolerances for reliable machinery assembly
- High-strength performance delivering 70,000 psi tensile and 35,000 psi shear strength for demanding applications
- Secure, non-slip installation with knurled head and 5/16" hex drive for easy torque application
- Durable thread engagement featuring Class 3A fit and coarse UNC threading for vibration resistance
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance
- Versatile rotational movement support with standard shoulder fit and right-hand thread direction
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery and equipment. The 316 stainless steel construction, combined with a black oxide finish, provides exceptional resistance to corrosion and wear, extending service life in demanding conditions. The 3" shoulder length and precise diameter tolerances ensure accurate spacing and smooth rotational movement, reducing component misalignment and maintenance downtime. With a Class 3A thread fit and coarse UNC threading, it offers reliable fastening under high vibration, making it ideal for applications such as pivots, shafts, and precision alignment pins. The socket head design with knurling enhances grip during installation, supporting efficient assembly in tight spaces.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for superior precision and a coarse UNC 1/2"-13 thread for robust engagement. Dimensions include a 5/8" shoulder diameter with tight tolerances (-0.004" to -0.002") and a 3" shoulder length (-0.005" to 0.005" tolerance). It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.
