S-94744A155 0.125" ID x 0.25" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from zinc plating, extending service life in demanding industrial environments.
• Enhanced load distribution with a 0.25" outer diameter, preventing surface damage and loosening under No. 4 screw loads.
• Reliable mechanical strength provided by Rockwell B40 hardness, ensuring the washer maintains its shape under pressure.
• Precision fit and alignment with a 0.125" inner diameter, offering secure fastening and reducing installation errors.
• Guaranteed dimensional consistency through compliance with ASME B18.21.1 standards, ensuring interchangeability and reliability.
• Environmental and safety compliance with RoHS 3 and REACH regulations, making them suitable for regulated industries.
• Durable construction from zinc-plated steel, providing long-term performance in vibration-prone applications.

Professional Applications & Engineering Value

These zinc-plated steel flat washers are engineered to solve common industrial fastening challenges, such as corrosion-induced failure and uneven load distribution. The zinc plating offers a protective barrier against moisture and chemicals, significantly enhancing corrosion resistance in outdoor or harsh environments like manufacturing plants and automotive assemblies. With a precise 0.125" ID and 0.25" OD, they ensure optimal alignment and stress dispersion for No. 4 screws, reducing the risk of joint failure and maintenance downtime. Ideal for industrial applications requiring consistent performance, these washers support machinery, electrical enclosures, and structural components by maintaining clamp load and extending the lifespan of fastened connections. Their compliance with ASME B18.21.1 standards further guarantees reliability in critical engineering projects.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.125", outer diameter of 0.25", and thickness ranging from 0.028" to 0.036", designed for use with No. 4 screw sizes. It meets ASME B18.21.1 specifications for dimensional accuracy and performance, ensuring consistent quality and fit. The washer is manufactured from zinc-plated steel with a Rockwell B40 hardness for durability. It is fully compliant with RoHS 3 (2015/863/EU), including exemption 6(a) for lead in steel, and REACH (EC 1907/2006) regulations, affirming its safety and environmental standards for global industrial use.