S-90311A132 8-32 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
- Vibration-resistant locking with permanent nylon patch thread locker, preventing loosening in dynamic applications from -50° to 250° F
- Superior corrosion resistance from 316 stainless steel material, ideal for harsh chemical or marine environments
- Precise alignment and bearing surfaces with standard shoulder fit and controlled diameter tolerances (-0.004" to -0.002")
- High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for demanding structural loads
- Easy installation and removal with 3/32" hex socket drive and knurled head for improved grip during handling
- Reliable thread engagement due to Class 3A fit and 8-32 UNC coarse thread design for faster assembly
- Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw with nylon patch thread locker addresses critical challenges in precision assembly and machinery. The UNC coarse thread and Class 3A fit ensure rapid, secure fastening with minimal risk of cross-threading, while the shoulder provides exact component spacing and rotational support in industrial applications like pivots, gears, and electronic mounts. The permanent locking feature eliminates the need for additional lock washers or adhesives, reducing assembly time and maintenance in high-vibration environments such as automotive, aerospace, and manufacturing equipment. Its high tensile and shear strength guarantees durability under cyclic loads, making it a reliable choice for precision shoulder bolts in safety-critical systems.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A precision fit for consistent thread engagement. Dimensions include a 3/16" shoulder length and diameter with tight tolerances, and the coarse thread spacing enhances assembly efficiency. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free of restricted substances for use in global markets.
