S-90474A173 0.281" ID x 0.734" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Lightweight corrosion resistance from aluminum construction reduces component weight while maintaining durability in various environments
• Precise dimensional fit with 0.281" ID ensures secure seating on 1/4" screws, preventing movement and maintaining alignment
• Optimal load distribution through 0.734" OD design minimizes surface pressure and prevents damage to connected materials
• Consistent performance with thickness range of 0.056-0.071" provides reliable spacing and vibration resistance
• Industry-standard compliance with ASME B18.21.1 guarantees interchangeability and engineering reliability
• Environmental responsibility through RoHS 3 and REACH compliance ensures safe use in regulated applications
• Versatile inch system compatibility makes these washers ideal for maintenance, repair, and North American manufacturing operations

Professional Applications & Engineering Value

These aluminum flat washers deliver critical engineering solutions where weight reduction and corrosion resistance are paramount. The precision dimensions (0.281" ID × 0.734" OD) ensure perfect compatibility with 1/4" screw applications, providing reliable load distribution across sensitive surfaces. The aluminum material prevents galvanic corrosion when paired with compatible metals, extending service life in electrical enclosures, aerospace components, and marine equipment. With controlled thickness variations (0.056-0.071"), these washers maintain consistent clamping force while compensating for minor surface irregularities. The ASME B18.21.1 compliance guarantees dimensional consistency across batches, reducing assembly time and ensuring predictable performance in automated manufacturing environments.

Specification Summary & Compliance

This flat washer features precise inch-system dimensions: 0.281" internal diameter, 0.734" outer diameter, and thickness ranging 0.056-0.071" for 1/4" screw applications. Manufactured to ASME B18.21.1 specifications for dimensional accuracy and performance reliability. The product maintains full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety, making it suitable for global industrial applications with environmental requirements.