S-8077A346 3/8"-24 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 spacing ensured by the 1/2" diameter shoulder with tight tolerances for reliable machinery assembly
- High tensile strength of 70,000 psi and shear strength of 35,000 psi for dependable performance in heavy-duty applications
- Fine UNF Class 3A threads provide secure, vibration-resistant fastening in precision equipment
- Easy installation and removal with hex socket drive and knurled head for improved grip and torque application
- Compliance with ASME B18.3 standards and environmental regulations (RoHS, REACH) for quality assurance and safety
- Durable construction with Rockwell B79 hardness, offering long service life in mechanical and rotational systems
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw with black oxide finish is engineered to address critical challenges in industrial settings, such as misalignment and corrosion in machinery. The 1/2" diameter shoulder and precise Class 3A UNF fine threads enable accurate spacing and rotational movement, reducing wear in applications like pivots, guides, and assembly jigs. Its high tensile and shear strength ensures reliability under dynamic loads, while the corrosion-resistant materials extend service life in humid or chemical-exposed environments. Ideal for precision equipment and industrial fastening, it minimizes downtime and maintenance costs in sectors like automotive, aerospace, and manufacturing.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, with Class 3A thread fit for high precision and UNF 3/8"-24 fine threads. Dimensions include a shoulder diameter of 1/2" (tolerance: -0.004" to -0.002") and length of 2" (tolerance: -0.005" to 0.005"). It is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence in global supply chains.
