S-91259A474 10-24 ASME B18.3, ASTM A574 Shoulder Screws
Shoulder Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Enhanced Durability & Corrosion Resistance – Black oxide finish provides superior protection against rust and wear in demanding industrial environments
- Precision Alignment & Smooth Rotation – Class 3A thread fit ensures tight tolerances for accurate component positioning and reduced vibration
- High Tensile Strength for Heavy-Duty Applications – 140,000 psi tensile strength and Rockwell C32 hardness withstand extreme mechanical stresses
- Secure Grip & Easy Installation – Knurled socket head with 1/8" hex drive prevents tool slippage and enables efficient assembly
- Reliable Shoulder Bearing Surface – 1/4" shoulder diameter with tight tolerances supports precise axial loads and rotational movements
- Industry Standard Compliance – Meets ASME B18.3 specifications for consistent performance and interchangeability
- Environmental & Safety Compliance – RoHS 3 and REACH compliant for safe use in regulated industries
Professional Applications & Engineering Value
This alloy steel shoulder screw with black oxide finish is engineered to solve critical alignment and durability challenges in precision machinery. The 10-24 UNC coarse thread with Class 3A fit provides secure fastening in high-vibration applications, while the 2 1/8" shoulder length acts as a precise pivot or spacer in assemblies requiring exact component positioning. The knurled socket head with hex drive ensures reliable torque transmission during installation, preventing damage in automated production environments. Ideal for industrial equipment, rotating mechanisms, and precision instruments where high tensile strength and corrosion resistance are essential for long-term performance.
Specification Summary & Compliance
Manufactured to ASME B18.3 standards with Class 3A thread fit for precision UNC threading. Features include: 10-24 thread size, 3/8" thread length, 1/4" shoulder diameter (-0.004" to -0.002" tolerance), and 2 1/8" shoulder length (-0.005" to 0.005" tolerance). Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Material certification to ASTM A574 ensures consistent alloy steel quality and mechanical properties.
