S-8077A591 5/16"-18 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.
- High tensile and shear strength (70,000 psi tensile, 35,000 psi minimum shear) for reliable load-bearing in demanding applications.
- Precision thread fit (Class 3A) ensures secure, vibration-resistant fastening with minimal risk of loosening.
- Knurled socket head with hex drive provides enhanced grip and easy installation, reducing tool slippage.
- Accurate shoulder dimensions with tight tolerances for precise alignment in machinery and rotating assemblies.
- Compliance with ASME B18.3 guarantees consistent quality and interchangeability in professional settings.
- RoHS 3 and REACH compliant for safe use in regulated industries without hazardous substances.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial machinery, automation, and precision equipment. The black oxide finish enhances corrosion resistance, making it suitable for humid or chemically aggressive environments. With a Class 3A thread fit and UNC coarse thread, it offers quick assembly and reliable retention under dynamic loads. The knurled socket head and hex drive simplify installation in confined spaces, reducing downtime. Ideal for pivots, guides, and rotating components, this screw ensures long service life and minimal maintenance in high-stress applications like robotics, conveyors, and automotive assemblies.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit for precise engagement. Dimensions include a 2 1/4" shoulder length (tolerance: -0.005" to 0.005") and 3/8" shoulder diameter (tolerance: -0.004" to -0.002"), ensuring accurate alignment. It meets ASME B18.3 specifications for dimensional consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental and safety standards.
