S-97345A395 8-32 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 industrial environments and extended service life.
- Precise alignment and secure pivoting ensured by the standard shoulder with controlled diameter and length tolerances.
- High-strength performance with a tensile strength of 70,000 psi and shear strength of 35,000 psi for demanding applications.
- Reliable, coarse UNC thread with Class 3A fit provides excellent vibration resistance and easier assembly in high-volume production.
- Enhanced grip and reduced tool slippage from the knurled socket head, paired with a 1/8" hex drive for efficient torque transfer.
- Consistent quality and interchangeability guaranteed by compliance with the ASME B18.3 standard.
- Safe for regulated industries with full compliance to RoHS 3 and REACH environmental regulations.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision assembly and machinery. The UNC coarse thread and Class 3A fit ensure fast, secure fastening with excellent resistance to loosening under vibration, making it ideal for industrial automation, conveyor systems, and pivoting mechanisms. The integral shoulder acts as a precise spacer or bearing surface, eliminating the need for additional components and reducing assembly time. Manufactured from corrosion-resistant 316 stainless steel and hardened to Rockwell B79, it delivers long-term reliability in demanding conditions, from food processing equipment to marine applications, while the knurled socket head provides a positive grip for high-torque installation without stripping.
Specification Summary & Compliance
This shoulder screw features an 8-32 UNC coarse thread with a Class 3A fit for precise thread engagement. The shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 3/16" with a tolerance of -0.005" to 0.005". It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.
