S-97345A666 5/16"-18 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 for extended service life in harsh environments
- Precise component alignment ensured by the 1" shoulder with tight diameter tolerance for reduced assembly play
- High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Reliable thread engagement through Class 3A fit UNC coarse threads for vibration resistance and quick assembly
- Secure tool engagement with 1/4" hex drive and knurled head for non-slip tightening even with gloves
- Industry compliance meeting ASME B18.3 specifications for dimensional accuracy and interchangeability
- Environmental responsibility with RoHS 3 and REACH compliance for global manufacturing standards
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw delivers critical engineering solutions where precision alignment and corrosion resistance are paramount. The 1" shoulder length with controlled diameter tolerance provides exact bearing surfaces for rotating components in machinery, eliminating the need for additional spacers. The UNC coarse thread with Class 3A fit maintains secure fastening in high-vibration environments common in industrial equipment, while the knurled socket head ensures positive tool engagement during maintenance. Engineered to ASME B18.3 standards, this shoulder screw offers reliable performance in precision assemblies, conveyor systems, and manufacturing fixtures where dimensional stability under load is essential.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit for superior engagement. Shoulder diameter tolerance maintained at -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005" for precision alignment. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Material hardness verified at Rockwell B79 with mechanical properties including 70,000 psi tensile strength and 35,000 psi minimum shear strength.
