S-92949A753 1/2"-20 x 1 1/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive 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 70,000 psi provides exceptional load-bearing capacity for demanding industrial applications.
- Precision Class 3A thread fit guarantees secure, vibration-resistant connections with minimal risk of loosening.
- Efficient hex drive design (5/16") allows for high torque application and easy installation with standard tools.
- Fully threaded 1/2"-20 UNF fine thread offers maximum grip and uniform stress distribution along the entire length.
- Durable Rockwell B55 hardness ensures resistance to wear and deformation under repeated use.
- Compliance with ASME B18.3, RoHS 3, and REACH assures quality, safety, and environmental standards for global supply chains.
Professional Applications & Engineering Value
Engineered for high-performance industrial applications, these 1/2"-20 UNF Class 3A rounded head screws address critical needs in machinery, automotive, and aerospace sectors where corrosion resistance and structural integrity are paramount. The 18-8 stainless steel material combined with a passivated finish effectively combats rust and chemical exposure, extending service life in challenging conditions. The fine UNF thread and Class 3A fit provide superior clamping force and vibration resistance, reducing maintenance downtime. With a hex drive enabling efficient torque transmission, these screws are ideal for heavy-duty assemblies requiring reliable, precision fastening that meets ASME B18.3 specifications.
Specification Summary & Compliance
This screw features a 1/2"-20 UNF fine thread with Class 3A tolerance for precise fit, fully threaded along a 1 1/4" length. It complies with ASME B18.3 manufacturing standards and is certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to strict environmental and safety regulations.
