DIN 9021B-A2/A4 Fender Washer; DIN 127B-A2/A4 Lock Washer; DIN 7980-A4 High Collar Lock Washer; DIN 137B-A2 Crinkled Spring Lock Washer; DIN 6798A-A2 Serrated External Washer; DIN 6798J-A2 Serrated Internal Washer; DIN 93-A4 Tab Washer
Lock Washers - Alma Bolt CompanyHigh Collar Lock Washers. Used for locking standard socket head cap screws, these washers are fabricated and cold worked to a Rockwell hardness of C35 to 43. Available in stainless steel or carbon steel. Stocked in sizes from #4 to 21/2". Group codes represented:HCLW
High collar split lock washers are thicker than standard split lock washers. They have a smaller outside diameter that is compatible with small-diameter screws. Stainless steel is a strong, corrosion-resistant alloy with excellent resistance to heat. It is used in high-stress, outdoor and corrosive applications.