S-96582A338 0.438" ID x 1" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Enhanced corrosion protection with black-coated steel to extend service life in harsh industrial environments
• Precise load distribution thanks to 1" outer diameter and 0.438" inner diameter, reducing surface stress and fastener failure
• Reliable dimensional accuracy ensuring consistent fit for 3/8" screws across multiple assembly applications
• Compliance with ASME B18.21.1 standards for guaranteed performance and interchangeability in mechanical systems
• RoHS 3 and REACH compliance for safe, environmentally responsible use in global supply chains
• Durable steel construction providing long-term stability under vibration and load without deformation

Professional Applications & Engineering Value

These USS flat washers are engineered with black corrosion-resistant coated steel to address common industrial challenges such as galvanic corrosion, surface abrasion, and fastener loosening in dynamic environments. The precise 1" OD and 0.438" ID ensure uniform pressure distribution, protecting sensitive surfaces and extending the lifespan of 3/8" fasteners in heavy machinery, structural frameworks, and outdoor equipment. By meeting ASME B18.21.1 specifications, these washers deliver consistent performance in industrial applications where reliability and compliance are critical, reducing maintenance costs and assembly failures.

Specification Summary & Compliance

This USS flat washer features inch-system dimensions with an inner diameter of 0.438", outer diameter of 1", and thickness range of 0.064–0.104". Manufactured in accordance with ASME B18.21.1 standards, it ensures precise fit and function for 3/8" screw sizes. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, adhering to environmental and safety regulations for industrial components.