S-94035A128 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 and passivated finish, ideal for harsh industrial environments.
- Exceptional tensile strength of 70,000 psi ensures reliable performance under high-stress conditions.
- Precise alignment and positioning thanks to the accurate 1/8" shoulder diameter and 5/32" shoulder length with tight tolerances.
- Easy installation and removal with hex socket drive and standard UNC coarse threads for efficient assembly.
- Consistent thread quality with Class 2A fit, reducing the risk of cross-threading and improving fastener reliability.
- Durable construction with Rockwell B55 hardness, offering excellent wear resistance and long service life.
- Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in global markets.
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. Made from 18-8 stainless steel with a passivated finish, it resists corrosion and oxidation, making it suitable for machinery, automotive assemblies, and electronic enclosures exposed to moisture or chemicals. The precise shoulder dimensions (1/8" diameter and 5/32" length) ensure accurate component positioning, reducing misalignment and wear in pivots, guides, and rotating parts. Combined with a Class 2A thread fit and coarse UNC threads, it facilitates quick installation and secure fastening, while the hex socket drive allows for tight spaces and high-torque applications. Ideal for heavy-duty industrial applications, this screw enhances equipment reliability and minimizes maintenance downtime.
Specification Summary & Compliance
This shoulder screw features Class 2A thread fit with UNC coarse threads, ensuring dimensional accuracy and interchangeability. Shoulder diameter is 1/8" with a tolerance of -0.001" to 0", and shoulder length is 5/32" with a tolerance of 0" to 0.002" for precise assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and regulatory adherence in industrial use.
