S-91259A410 8-32 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 demanding applications
- Precision Class 3A thread fit ensures secure fastening and vibration resistance in assembly operations
- Corrosion-resistant black oxide finish provides enhanced durability and protection in harsh industrial environments
- High-strength alloy steel construction with Rockwell C32 hardness delivers superior wear resistance and long service life
- Standard hex socket drive allows for easy installation and removal with common tools while maintaining clean aesthetics
- Accurate shoulder dimensions with tight tolerances ensure proper alignment and smooth rotational movement in pivot applications
- Full regulatory compliance meets ASME B18.3, ASTM A574, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
This high-strength shoulder screw addresses critical engineering challenges in precision machinery and industrial equipment. The 8-32 UNC coarse thread with Class 3A fit provides superior holding power while the precisely machined 3/16" shoulder length serves as an accurate locating diameter for rotating components. Manufactured from alloy steel with black oxide finish, this fastener resists corrosion while maintaining dimensional stability under heavy loads. The combination of 140,000 psi tensile strength and 84,000 psi shear strength makes it ideal for pivot points, bearing retention, and precision alignment applications where failure is not an option. The hex socket drive design ensures clean installation in confined spaces while providing reliable torque transmission.
Specification Summary & Compliance
This shoulder screw features 8-32 UNC coarse threads with Class 3A precision fit and exact 3/16" shoulder length with tight diameter tolerance of -0.004" to -0.002". Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel with Rockwell C32 hardness. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial applications worldwide.
