S-94744A249 0.344" ID x 0.875" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Optimal load distribution with precise 0.875" outer diameter design, preventing surface damage and fastener loosening
• Perfect fit for 5/16" screws with 0.344" inner diameter, ensuring secure fastening and reduced installation time
• Enhanced durability with Rockwell B40 hardness, maintaining structural integrity under repeated stress
• Guaranteed dimensional accuracy through ASME B18.21.1 compliance, ensuring consistent performance in critical assemblies
• Environmental regulation compliance with RoHS 3 and REACH standards, meeting global sustainability requirements
• Versatile thickness range (0.056-0.071") for flexible application in various gap-filling scenarios

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these zinc-plated steel flat washers solve critical challenges in machinery assembly, structural frameworks, and automotive components. The zinc plating provides a sacrificial layer that actively resists rust and galvanic corrosion, significantly extending maintenance intervals in humid or chemically exposed environments. With precise 0.344" ID and 0.875" OD dimensions, these flat washers create optimal bearing surfaces that prevent 5/16" screws from embedding into soft materials or loosening under vibration. The Rockwell B40 hardness ensures the washers maintain their shape under heavy clamping forces, making them ideal for heavy-duty applications where consistent load distribution is paramount for joint integrity and safety.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional standards with precise inch measurements (ID: 0.344", OD: 0.875", Thickness: 0.056-0.071"). Fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations updated to 233 SVHC as of 01/17/2023. The zinc-plated steel construction and Rockwell B40 hardness ensure consistent performance across industrial applications requiring reliable flat washers for 5/16" screw installations.