S-8077A281 7/8"-9 ASME B18.3 Shoulder Screws
Shoulder Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh industrial environments
- Enhanced durability and wear protection from the Black Oxide finish, reducing maintenance needs
- Precise alignment and secure fit with Class 3A thread tolerance and 1-1/4" shoulder diameter
- High mechanical strength delivering 70,000 psi tensile and 35,000 psi shear for demanding applications
- Easy installation and removal with knurled socket head and 5/8" hex drive, minimizing tool slippage
- Reliable performance in regulated industries through compliance with ASME B18.3, RoHS 3, and REACH standards
- Optimized for coarse threading applications with 7/8"-9 UNC right-hand threads for quick assembly
Professional Applications & Engineering Value
This 316 Stainless Steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The Black Oxide finish provides an additional layer of corrosion resistance, extending service life in moist or chemically aggressive settings. With a Class 3A thread fit and precisely machined shoulder (1-1/4" diameter, 1-3/4" length), it ensures accurate component alignment and reduces vibration-induced loosening. The knurled socket head and hex drive design allow for high-torque installation, making it suitable for assembly lines where speed and reliability are paramount. Ideal for use in pivoting mechanisms, bearing mounts, and structural joints, this shoulder screw combines high tensile strength (70,000 psi) with regulatory compliance, supporting industries from aerospace to industrial manufacturing.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit for precise engagement and meets ASME B18.3 specifications for dimensional accuracy. The shoulder diameter is maintained within -0.004" to -0.002" tolerance, and shoulder length within -0.005" to 0.005". It features 7/8"-9 UNC coarse threads and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global markets.
