S-8077A867 1/4"-28 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 construction and black oxide finish, ideal for harsh industrial environments
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable, long-lasting assemblies
- Precise thread engagement with Class 3A fit and UNF fine threads ensuring secure fastening and vibration resistance
- Easy installation and removal featuring a 5/32" hex socket drive and knurled head for improved grip during torque application
- Accurate shoulder dimensions with tight tolerances for consistent alignment in machinery and pivot applications
- High durability backed by Rockwell B79 hardness, maintaining performance under repetitive loads
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for safe, regulated use
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision assemblies, such as maintaining alignment in rotating machinery and providing reliable pivots in automotive or aerospace components. The black oxide finish enhances corrosion resistance, extending service life in moist or chemically aggressive settings. With its Class 3A thread fit and UNF fine threads, it ensures minimal backlash and superior vibration resistance, reducing maintenance needs in high-stress applications. The combination of 70,000 psi tensile strength and a knurled socket head allows for secure fastening even in confined spaces, making it a trusted choice for engineers seeking durability and precision in industrial shoulder screw applications.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit tolerances and ASME B18.3 specifications, ensuring dimensional accuracy with shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free of hazardous substances for safe industrial use.
