S-90298A881 3/4"-10 ASME B18.3 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 passivated finish, ideal for harsh industrial environments
- Exceptional thread reliability with Class 3A fit UNC coarse threads ensuring precise, vibration-resistant fastening
- High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
- Accurate component alignment through precisely machined shoulder with tight diameter and length tolerances
- Enhanced installation control with knurled socket head and 1/2" hex drive preventing tool slippage
- Full regulatory compliance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH
- Optimized for machinery assembly featuring right-hand coarse threads for rapid installation in high-vibration environments
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw delivers critical engineering solutions for precision machinery and industrial equipment. The Class 3A thread fit with 3/4"-10 UNC coarse threads provides superior resistance to loosening under vibration, while the precisely toleranced 1" shoulder diameter and 3.5" shoulder length ensure perfect alignment of rotating components in assemblies. The passivated finish enhances corrosion protection in demanding environments, and the knurled socket head with 1/2" hex drive allows for high-torque installation without cam-out. These shoulder screws are engineered to maintain dimensional stability under 70,000 psi tensile loads, making them ideal for precision pivots, rotating shafts, and mechanical linkages where exact positioning and durability are paramount.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit per UNC specifications and shoulder tolerances of -0.001" to 0.001" for diameter and -0.005" to 0.005" for length. Complies with ASME B18.3 dimensional standards and meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance. The 18-8 stainless steel construction with passivated finish ensures consistent performance across industrial applications.
