S-94035A136 4-40 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
- Precise component alignment ensured by the 1/8" shoulder diameter with tight tolerances (-0.001" to 0") for stable assembly
- High mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing applications
- Easy installation and removal with hex socket drive design, reducing tool slippage and assembly time
- Consistent thread engagement through UNC coarse threads and Class 2A fit, preventing cross-threading in repetitive operations
- Extended service life due to durable material and surface treatment, minimizing replacement frequency
- Regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material combined with a passivated finish provides excellent resistance to oxidation and chemical exposure, making it suitable for machinery, automotive, and electronic enclosures operating in demanding conditions. The 1/8" shoulder diameter with precise tolerances acts as a reliable pivot or spacer, eliminating misalignment in rotating parts like gears and pulleys. With a 5/8" shoulder length, it accommodates various component thicknesses while maintaining structural integrity under 70,000 psi tensile loads. The hex drive socket head ensures secure tool engagement, reducing the risk of fastener damage during high-torque applications. Ideal for industrial shoulder screws requirements, it enhances assembly accuracy and reduces maintenance downtime.
Specification Summary & Compliance
This shoulder screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent engagement. Dimensions include a shoulder diameter of 1/8" (tolerance: -0.001" to 0") and shoulder length of 5/8" (tolerance: 0" to 0.002"), ensuring precise manufacturing. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental and safety standards for industrial use.
