S-91475A373 1.379" ID x 2.219" OD ASME B18.21.1; MS35338-56 Mil. Spec. Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications
• Enhanced corrosion protection through zinc yellow-chromate plating for extended service life
• Exceptional hardness rating (Rockwell C38) maintains spring tension under heavy loads
• Precision dimensional accuracy ensures perfect fit for 1 3/8" screw applications
• Industry-standard compliance with ASME B18.21.1 and MS35338-56 specifications
• Reliable split lock design provides consistent spring action and locking performance
• Heavy-duty construction withstands extreme industrial environments and repeated use

Professional Applications & Engineering Value

These split lock washers deliver critical vibration-resistant performance in demanding mechanical assemblies where fastener security is paramount. The zinc yellow-chromate plated steel construction provides dual-layer protection against corrosion while maintaining the essential spring characteristics required for effective locking. Engineered with Rockwell C38 hardness, these washers maintain their tension and deflection properties even under sustained heavy loads, preventing joint failure in industrial machinery, heavy equipment, and structural applications. The precise 1.379" ID and 2.219" OD dimensions ensure optimal contact distribution and reliable performance for 1 3/8" screw size applications, making them ideal for maintenance, repair, and OEM operations where vibration-induced loosening poses significant operational risks.

Specification Summary & Compliance

This standard split lock washer features precise inch system dimensions (1.379" ID × 2.219" OD × 0.344" thickness) manufactured to exacting ASME B18.21.1 specifications and military standard MS35338-56. The product maintains dimensional accuracy per industry standards and utilizes zinc yellow-chromate plated steel for superior corrosion resistance. Manufactured with Rockwell C38 hardness to ensure consistent spring performance, these washers comply with relevant industrial specifications for mechanical fasteners in demanding applications.