S-91013A724 0.322" ID x 0.583" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through the split lock design that maintains consistent tension under dynamic loads
• Lightweight aluminum construction providing excellent corrosion resistance without compromising mechanical performance
• Precision dimensional control with 0.322" ID and 0.583" OD ensuring perfect fit for 5/16" fasteners
• Enhanced durability with Rockwell B87 hardness rating for long service life in demanding applications
• Industry-standard compliance with ASME B18.21.1 specifications for reliable performance and interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance, meeting strict regulatory requirements
• Optimal spring action from the standard split design that maintains locking force through thermal cycling and vibration

Professional Applications & Engineering Value

This aluminum split lock washer delivers critical vibration-resistant performance in industrial settings where weight reduction and corrosion resistance are paramount. The split lock washer design creates continuous spring tension that compensates for thermal expansion, joint relaxation, and mechanical vibrations – common failure points in machinery, automotive, and aerospace assemblies. Manufactured to ASME B18.21.1 standards, these washers provide reliable locking action for 5/16" fasteners while the aluminum material eliminates galvanic corrosion concerns when paired with compatible metals. The Rockwell B87 hardness ensures the washer maintains its spring characteristics through repeated loading cycles, making it ideal for equipment subject to constant vibration or thermal cycling where traditional flat washers would fail.

Specification Summary & Compliance

This split lock washer features precise inch dimensions with 0.322" internal diameter, 0.583" outer diameter, and 0.078" thickness, engineered for 5/16" screw applications. Manufactured in compliance with ASME B18.21.1 standards for dimensional accuracy and performance requirements. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The standard split lock configuration provides reliable spring tension and vibration resistance in mechanical assemblies.