S-97768A389 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 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments
- Precise component alignment through 2 3/4" shoulder length with tight tolerances for consistent positioning
- High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure installation with Class 3A thread fit and UNC coarse threads providing reliable engagement
- Easy installation and removal featuring hex socket drive and knurled head for superior grip
- Industry compliance assurance meeting ASME B18.3 standards and environmental regulations
- Durable construction with Rockwell B55 hardness ensuring long service life
Professional Applications & Engineering Value
This shoulder screw delivers exceptional engineering value in precision applications where component alignment and rotational movement are critical. The 18-8 stainless steel construction with black oxide finish provides excellent corrosion resistance in manufacturing environments, while the 2 3/4" shoulder length with tight diameter tolerance ensures precise bearing surfaces and pivot points. The 5/16"-18 UNC coarse threads with Class 3A fit offer reliable fastening in machinery, automation systems, and rotating assemblies. The hex socket drive combined with the knurled head texture facilitates secure installation in confined spaces, making it ideal for industrial equipment, conveyor systems, and precision mechanisms requiring both structural integrity and dimensional accuracy.
Specification Summary & Compliance
This shoulder screw features precision Class 3A thread fit with 5/16"-18 UNC coarse threads and maintains shoulder diameter tolerance of -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications and compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring both dimensional accuracy and regulatory compliance for industrial applications.
