S-8077A783 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 and black oxide finish, ideal for harsh industrial environments
- Exceptional mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for heavy-duty applications
- Precision thread engagement with Class 3A UNC coarse threads ensuring reliable fastening and vibration resistance
- Secure installation and removal through 5/16" hex drive socket head with knurled texture for improved grip
- Accurate component alignment with precisely machined 5/8" diameter shoulder maintaining consistent positioning
- Extended service life featuring Rockwell B79 hardness for durability under repeated use
- Regulatory compliance assurance meeting ASME B18.3 standards and RoHS/REACH environmental directives
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw with black oxide finish provides critical performance advantages in precision machinery, automotive assemblies, and industrial equipment. The 3/8"-16 UNC thread with Class 3A fit ensures secure fastening in high-vibration environments, while the 2 1/2" shoulder length accommodates rotating components and linkages with precise clearance. The knurled socket head with 5/16" hex drive facilitates installation in confined spaces, and the corrosion-resistant construction maintains integrity in chemical exposure or outdoor conditions. These engineering features combine to reduce maintenance frequency and prevent assembly failures in demanding industrial applications.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit and shoulder diameter tolerance of -0.004" to -0.002". The shoulder length tolerance maintains precision at -0.005" to 0.005" for consistent component alignment. Compliant with ASME B18.3 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for restricted substance compliance.
