S-91273A153 1/4"-20 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
- Corrosion-resistant 18-8 stainless steel construction ensures long-term reliability in harsh industrial environments
- 70,000 psi tensile strength and 35,000 psi minimum shear strength provides exceptional load-bearing capacity for demanding applications
- Precision Class 2A thread fit with UNC coarse threading enables quick assembly and secure fastening in high-vibration settings
- Knurled hex socket head design offers superior grip and torque transmission during installation
- 3/8" shoulder length with tight diameter tolerance maintains precise component alignment and rotational stability
- Rockwell B55 hardness rating delivers excellent wear resistance and durability under repeated use
- Full compliance with RoHS 3 and REACH regulations guarantees environmental safety and global market acceptance
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw with 1/4-20 UNC coarse threading solves critical alignment challenges in precision machinery and industrial equipment. The 3/8" shoulder length acts as a precise locating dowel for rotating components, eliminating misalignment while the hex socket head with knurled texture ensures secure tool engagement in confined spaces. Engineered for high-strength applications requiring 35,000 psi shear resistance, it prevents component slippage in conveyor systems, automation equipment, and mechanical assemblies. The corrosion-resistant properties of 18-8 stainless steel make it ideal for food processing, marine, and chemical environments where moisture resistance is essential.
Specification Summary & Compliance
This precision shoulder screw features Class 2A thread fit with 1/4-20 UNC coarse threads and maintains shoulder diameter tolerance of -0.004" to -0.002". Manufactured to exacting standards, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The right-hand thread direction and standard shoulder fit ensure compatibility with industrial fastening systems worldwide.
