S-91273A186 5/16"-18 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
- Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
- High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) for reliable performance under heavy loads
- Precise shoulder alignment with 4-1/2" shoulder length and tight tolerances for accurate component positioning
- Easy installation and removal with knurled hex socket head providing superior grip and torque transmission
- Wide compatibility with UNC coarse threads (5/16"-18) ensuring quick assembly and secure fastening
- Durable Rockwell B55 hardness offering excellent wear resistance and long service life
- Regulatory compliance with RoHS 3 and REACH standards for safe, environmentally responsible use
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw delivers critical engineering solutions where precision alignment and high strength are paramount. The 4-1/2" shoulder length with tight diameter and length tolerances ensures accurate component positioning in machinery, automation systems, and rotating assemblies, eliminating misalignment issues. The 5/16"-18 UNC coarse thread provides rapid assembly and secure fastening in high-vibration environments, while the knurled hex socket head enables efficient torque application without slippage. Manufactured from corrosion-resistant 18-8 stainless steel with Rockwell B55 hardness, it withstands demanding conditions in manufacturing equipment, automotive fixtures, and industrial machinery, offering reliable performance and reduced maintenance requirements.
Specification Summary & Compliance
This shoulder screw features Class 2A thread fit for standard industrial applications, with shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Manufactured to UNC thread standards with right-hand thread direction and coarse thread spacing. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for industrial use.
