S-91273A661 1/2"-13 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
- Exceptional corrosion resistance with 18-8 Stainless Steel and Black Oxide finish, ideal for harsh industrial environments
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and reduces risk of fastener failure
- Precision Class 2A thread fit guarantees smooth assembly and consistent engagement, minimizing play and vibration
- Knurled head with 1/4" hex drive provides secure grip and easy installation, even in tight spaces
- Coarse UNC threads enable quick fastening and superior holding power in a variety of materials
- Durable shoulder design with 1/2" diameter offers precise alignment for rotating components like gears and pulleys
- Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards
Professional Applications & Engineering Value
This 1/2"-13 UNC shoulder screw is engineered to solve critical alignment and durability challenges in industrial machinery. The 18-8 Stainless Steel construction, enhanced by a Black Oxide finish, provides excellent resistance to rust and wear, extending service life in demanding applications such as assembly jigs, conveyor systems, and robotic arms. The Class 2A thread fit and coarse UNC thread type ensure rapid, secure fastening with minimal cross-threading risk, while the knurled socket head allows for high-torque installation without slippage. With a 70,000 psi tensile strength and precise shoulder dimensions, it maintains component alignment under dynamic loads, reducing maintenance downtime and improving operational reliability in industrial shoulder screw applications.
Specification Summary & Compliance
This shoulder screw adheres to Class 2A thread fit tolerances for consistent performance, with a 1/2"-13 UNC coarse thread and right-hand thread direction. Shoulder diameter is maintained at 1/2" with a tolerance of -0.004" to -0.002", and shoulder length is 1/2" with a tolerance of -0.005" to 0.005" for precise fit. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances and suitable for global industrial use.
