S-91858A853 1/2"-13 x 1 1/4" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws
Stainless Steel Slotted Flat 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 with 316 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
- Precision Class 2A thread fit provides smooth installation and secure fastening in coarse UNC threading applications
- 82° countersink angle with standard flat head profile enables flush mounting for streamlined assemblies
- Full threading along the entire 1-1/4" length maximizes grip and load distribution across connected materials
- Rockwell B80 hardness maintains structural integrity and resists deformation during repeated use
- Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH standards guarantees quality and environmental safety
Professional Applications & Engineering Value
These 1/2"-13 UNC flat head screws deliver critical performance advantages in demanding industrial settings where corrosion resistance and mechanical strength are paramount. The 316 stainless steel material combined with passivated finish provides exceptional protection against chemical exposure, saltwater environments, and high humidity—making them ideal for marine equipment, chemical processing plants, and food manufacturing facilities. The coarse thread design with Class 2A fit ensures rapid installation and reliable engagement in softer materials or applications requiring frequent disassembly. With fully threaded construction and 82° countersink angle, these screws distribute clamping force evenly while maintaining flush surfaces in precision assemblies. Engineered to withstand sustained 70,000 psi tensile loads, they prevent joint failure in structural frameworks, machinery mounts, and heavy-duty equipment where vibration resistance is critical.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent performance. Features 1/2"-13 UNC coarse threads with right-hand direction and standard flat head profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
