S-91273A653 3/8"-24 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
- Exceptional load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Precision alignment and smooth rotation ensured by the 1 1/4" shoulder with tight diameter tolerance (-0.004" to -0.002")
- Secure, slip-resistant installation provided by the knurled socket head and 3/16" hex drive
- Reliable thread engagement with Class 2A fit and 3/8"-24 UNF fine threads for vibration resistance
- Environmental compliance assurance meeting RoHS 3 and REACH standards for global manufacturing use
- Optimized dimensional stability with Rockwell B55 hardness maintaining performance under repeated stress
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw delivers critical engineering solutions where precision alignment and high-strength performance are paramount. The black oxide finish enhances corrosion resistance in manufacturing equipment, automotive assemblies, and machinery requiring durable fastening. The 1 1/4" precision shoulder acts as a reliable axle or pivot point in rotating mechanisms, while the 3/8"-24 UNF fine threads provide superior vibration resistance in dynamic load conditions. With 70,000 psi tensile strength and knurled socket head design, it prevents tool slippage during torque application, making it ideal for automated assembly lines and maintenance-critical industrial applications where fastener integrity directly impacts operational safety and equipment longevity.
Specification Summary & Compliance
Manufactured to exacting standards with Class 2A thread fit and UNF thread specifications ensuring dimensional accuracy. The shoulder maintains tight tolerances with diameter range of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental safety for global industrial applications.
