S-8077A324 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 and black oxide finish, ideal for harsh industrial environments
- Precise alignment and smooth rotation thanks to the 1/2" shoulder diameter with tight tolerance control
- High-strength performance with 70,000 psi tensile and 35,000 psi shear strength for demanding applications
- Secure, non-slip installation enabled by the knurled head and 1/4" hex socket drive
- Reliable thread engagement with Class 3A fit and UNC coarse thread spacing for quick assembly
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance
- Durable construction with Rockwell B79 hardness ensuring long service life under mechanical stress
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and wear challenges in precision machinery, automation systems, and rotating assemblies. The 316 stainless steel material, combined with a black oxide finish, provides exceptional resistance to corrosion and chemical exposure, making it suitable for food processing, marine, and chemical handling equipment. The knurled head enhances grip during manual adjustments, while the hex socket drive allows for high-torque installation without stripping. With a Class 3A thread fit and controlled shoulder dimensions, it ensures minimal backlash and consistent performance in jigs, fixtures, and bearing mounts, reducing maintenance downtime and improving operational reliability.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit and UNC coarse thread spacing for precise engagement. Key dimensional tolerances include shoulder diameter (-0.004" to -0.002") and shoulder length (-0.005" to 0.005") to ensure accurate assembly. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity for global industrial use.
