S-91273A235 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
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
- Precise component alignment ensured by the 2 3/4" shoulder with tight length tolerances (±0.005").
- High-strength performance with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications.
- Easy installation and removal thanks to the knurled hex socket head providing excellent grip and torque transmission.
- Reliable thread engagement with Class 2A fit and coarse 1/2"-13 UNC threads for quick assembly and vibration resistance.
- Durable wear resistance from Rockwell B55 hardness, maintaining integrity under repeated use.
- Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 2 3/4" shoulder length with minimal tolerance variations provides a stable bearing surface for precise positioning of components like gears, pulleys, and linkages in machinery. The coarse 1/2"-13 UNC thread and Class 2A fit enable rapid assembly while resisting loosening from vibrations, reducing maintenance downtime. Combined with the knurled hex socket head, it offers secure driving without slippage, even in high-torque applications. Its corrosion-resistant properties and high tensile strength make it ideal for automotive, manufacturing, and assembly lines where reliability and longevity are paramount.
Specification Summary & Compliance
This shoulder screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and a shoulder length tolerance of -0.005" to 0.005". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Manufactured with UNC coarse threads and a standard shoulder fit, it is suitable for applications requiring reliable performance under stress and environmental regulations.
