S-90121A581 5/16"-18 x 3/4" ASME B18.2.1 Stainless Steel Wire-Lockable Hex Head Screws
Stainless Steel Wire-Lockable Hex Head 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 from 18-8 stainless steel construction, ideal for harsh environments and reducing replacement frequency.
- High tensile strength of 70,000 psi ensures reliable performance under significant load and stress in demanding applications.
- Excellent durability and wear resistance provided by Rockwell B70 hardness, extending the screw's service life.
- Secure and reliable fastening with a Class 2A thread fit, offering consistent engagement and vibration resistance.
- Easy installation and removal facilitated by the external hex drive and coarse UNC threads, saving time on the assembly line.
- Full threading along the 3/4" length allows for maximum grip and adjustability in various material thicknesses.
- Compliance with industry standards including ASME B18.2.1 and RoHS 3, ensuring quality, safety, and environmental responsibility.
Professional Applications & Engineering Value
This 18-8 stainless steel hex head screw is engineered to address common industrial challenges such as corrosion, high stress, and assembly efficiency. The UNC coarse thread and external hex drive enable quick and secure fastening in materials like metal and thick plastics, reducing installation time and labor costs. Its fully threaded design ensures uniform load distribution, preventing loosening under vibration—a critical feature in machinery, construction, and automotive applications. Made from corrosion-resistant 18-8 stainless steel, it withstands exposure to moisture and chemicals, minimizing maintenance and downtime in demanding environments like outdoor equipment or processing plants.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC coarse thread with a Class 2A thread fit for precise dimensional accuracy and reliable performance. It complies with ASME B18.2.1 manufacturing specifications and meets RoHS 3 (2015/863/EU) environmental standards, ensuring it is free from hazardous substances. The product is designed in the inch system with a length of 3/4" and fully threaded construction, adhering to industry norms for quality and safety.
