S-91737A053 2-56 x 5/16" ASME B18.6.3 Stainless Steel Fillister Head Phillips Screws
Stainless Steel Fillister Head Phillips 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, ensuring long-term reliability in harsh environments.
- High tensile strength of 80,000 psi provides exceptional load-bearing capacity and resistance to mechanical failure under stress.
- Rockwell B85 hardness offers excellent durability and wear resistance, reducing the need for frequent replacements.
- Coarse UNC threads with Class 2A fit enable quick, secure installation and reliable performance in various materials.
- Rounded fillister head with Phillips No. 1 drive allows for easy, flush mounting and efficient torque application in confined spaces.
- Fully threaded design ensures maximum grip and uniform stress distribution along the entire length for enhanced joint integrity.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This 2-56 UNC machine screw is engineered to address common industrial challenges, such as vibration loosening and corrosion-induced failures. Made from 18-8 stainless steel with a passivated finish, it resists oxidation and chemical exposure, making it ideal for applications in electronics, automotive assemblies, and machinery where moisture or contaminants are present. The rounded fillister head and Phillips drive facilitate easy installation in tight spaces, while the coarse thread and Class 2A fit ensure secure fastening in metals and plastics. Its high tensile strength and full threading provide reliable performance in dynamic loads, reducing maintenance downtime and improving operational efficiency in industrial screws applications.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse threading with a diameter of 0.086" and length of 5/16". It complies with ASME B18.6.3 manufacturing standards, ensuring dimensional accuracy and consistency. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries without hazardous substances.
