S-91259A849 5/8"-11 ASME B18.3, ASTM A574 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 load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength for reliable performance in high-stress applications
- Superior corrosion resistance through black oxide finish that protects against rust and extends service life in harsh environments
- Precise thread engagement with Class 3A thread fit ensuring tight tolerances and secure fastening in critical assemblies
- Enhanced installation control featuring knurled socket head with 3/8" hex drive for positive grip and reduced tool slippage
- Optimized material performance from alloy steel with Rockwell C32 hardness providing excellent durability and wear resistance
- Industry-standard compliance meeting ASME B18.3 specifications for consistent quality and interchangeability
- Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries
Professional Applications & Engineering Value
This heavy-duty shoulder screw addresses critical engineering challenges in demanding industrial applications where precision alignment and high load capacity are paramount. The alloy steel construction with Rockwell C32 hardness provides exceptional resistance to deformation under heavy loads, while the black oxide finish offers reliable corrosion protection in manufacturing environments. The 5/8"-11 UNC coarse thread configuration ensures rapid assembly and disassembly, with the Class 3A thread fit maintaining precise tolerances for vibration resistance. The knurled socket head with 3/8" hex drive prevents cam-out during high-torque installation, making it ideal for machinery, automotive, and heavy equipment applications where reliability and repeatability are essential.
Specification Summary & Compliance
This shoulder screw features precision Class 3A thread fit with 5/8"-11 UNC coarse threads and maintains tight dimensional tolerances including shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications using ASTM A574 compliant alloy steel, the product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting the latest environmental and safety standards for industrial components.
