S-94744A220 0.188" ID x 0.375" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust and extends service life in demanding environments
• Enhanced load distribution from precise 0.375" outer diameter, preventing surface damage and maintaining joint integrity
• Reliable hardness performance with Rockwell B40 rating ensuring consistent durability under mechanical stress
• Perfect fit for No. 8 screws with 0.188" inner diameter providing secure fastening without slippage
• Industry-standard compliance meeting ASME B18.21.1 specifications for dimensional accuracy and quality assurance
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe global industrial use
• Optimized thickness control (0.036-0.045") ensuring proper spacing and vibration resistance in assembled components

Professional Applications & Engineering Value

These zinc-plated steel flat washers deliver critical engineering solutions where corrosion protection and dimensional precision are paramount. The zinc plating creates a sacrificial barrier that significantly extends component life in humid or chemically aggressive environments, while the Rockwell B40 hardness maintains structural integrity under repeated loading cycles. Engineered specifically for No. 8 screw applications, these flat washers prevent loosening from vibration and distribute clamping forces evenly across surfaces, protecting delicate materials from indentation. Their ASME B18.21.1 compliance guarantees interchangeability and reliable performance in industrial maintenance, machinery assembly, and electrical enclosures where consistent fastener performance is non-negotiable.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 standards with precise dimensional tolerances, these flat washers feature 0.188" inner diameter and 0.375" outer diameter with controlled thickness between 0.036-0.045". The zinc-plated steel construction meets Rockwell B40 hardness requirements for mechanical durability. Full compliance with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as steel alloying element and REACH (EC 1907/2006) regulations ensures environmental responsibility and global market acceptance.