S-91475A740 0.628" ID x 1.073" OD ASME B18.21.1; MS35338-145 Mil. Spec. Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications
• Exceptional corrosion resistance from passivated 316 stainless steel for harsh environments
• Precision dimensional accuracy with 0.628" ID and 1.073" OD ensures perfect fit for 5/8" screws
• Enhanced durability with Rockwell C35 hardness for long-term performance under load
• Industry-standard compliance with ASME B18.21.1 and MS35338-145 specifications
• Environmental responsibility through RoHS 3 and REACH compliance for sustainable operations
• Reliable locking action from standard split design maintains consistent clamping force

Professional Applications & Engineering Value

This passivated 316 stainless steel split lock washer delivers critical vibration resistance in demanding industrial applications where fastener security is paramount. The split lock washer design creates continuous spring tension that compensates for thermal expansion, vibration, and load variations in machinery, automotive, and marine assemblies. The 316 stainless steel construction with passivated surface treatment provides exceptional resistance to chemicals, saltwater, and industrial atmospheres, making it ideal for corrosive environments where ordinary washers would fail. Engineered to ASME B18.21.1 standards, this industrial-grade locking solution ensures reliable performance in critical bolted connections, reducing maintenance frequency and preventing costly downtime in heavy machinery, processing equipment, and structural applications.

Specification Summary & Compliance

This standard split lock washer features precise dimensions of 0.628" internal diameter, 1.073" outer diameter, and 0.156" thickness, specifically designed for 5/8" screw applications. Manufactured to exacting ASME B18.21.1 and MS35338-145 specifications, ensuring consistent quality and performance. The washer meets comprehensive compliance standards including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental responsibility and chemical safety. The Rockwell C35 hardness rating guarantees mechanical integrity under demanding service conditions.