S-94744A253 0.344" ID x 1.125" OD ASME B18.21.1 ASME Washers
ASME Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
- Precise dimensional fit with 0.344" ID and 1.125" OD ensuring perfect alignment with 5/16" fasteners
- Enhanced load distribution through optimal thickness range (0.056-0.071") preventing surface damage and joint loosening
- Consistent mechanical performance with Rockwell B40 hardness providing reliable strength under pressure
- Industry-standard compliance meeting ASME B18.21.1 specifications for guaranteed interchangeability
- Environmental regulation adherence with RoHS 3 and REACH compliance for global supply chain compatibility
- Reduced maintenance requirements through durable zinc plating that resists rust and degradation
Professional Applications & Engineering Value
This zinc-plated steel flat washer delivers critical engineering solutions for industrial assembly challenges. The Rockwell B40 hardness ensures consistent performance under vibrational stresses, while the zinc plating provides essential corrosion protection in manufacturing facilities, outdoor equipment, and marine-adjacent applications. Engineered to ASME B18.21.1 standards, these inch-system washers maintain precise dimensional tolerances for reliable fit with 5/16" screws, preventing joint failure and reducing assembly time. The optimized 1.125" OD distributes clamping forces effectively across surfaces, protecting sensitive materials from damage while maintaining structural integrity in heavy machinery, construction projects, and automotive applications.
Specification Summary & Compliance
Manufactured to ASME B18.21.1 dimensional standards with precise internal diameter (0.344"), outer diameter (1.125"), and thickness range (0.056-0.071"). The zinc-plated steel construction meets Rockwell B40 hardness requirements for consistent mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as steel alloying element and REACH (EC 1907/2006) regulations regarding Substances of Very High Concern (SVHC) as of January 17, 2023.
