S-8077A321 3/8"-16 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, ideal for harsh environments and extended service life
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable, high-load applications
- Precision Class 3A thread fit ensures consistent, secure engagement and reduces the risk of cross-threading during assembly
- Enhanced grip and anti-rotation from the knurled head texture, providing better handling and torque application
- Durable Black Oxide finish adds an extra layer of corrosion protection and reduces light reflection for a professional appearance
- Wide industrial compliance meeting ASME B18.3 standards and environmental regulations like RoHS 3 and REACH for global use
- Versatile socket hex drive allows for easy installation in confined spaces with standard 1/4" hex tools
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and pivot point requirements in demanding assemblies. The precision-machined shoulder with tight diameter and length tolerances provides a secure bearing surface, eliminating the need for separate spacers and reducing component count. Manufactured from 316 Stainless Steel, it resists corrosive agents in chemical processing, marine, and outdoor applications. The Black Oxide finish not only enhances corrosion resistance but also minimizes galling. Combined with the Class 3A thread fit and knurled socket head, this fastener ensures reliable performance in machinery, automation systems, and precision equipment where vibration resistance and repeatable accuracy are paramount.
Specification Summary & Compliance
This shoulder screw features a 3/8"-16 UNC coarse thread with a precision Class 3A thread fit. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and the shoulder length is 2 1/8" with a tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant.
