Thru Hardened Carbon Steel Plain Medium (Regular) Split Lock Washers

9/16" Thru Hardened Carbon Steel Plain Medium (Regular) Split Lock Washers

• .574-.564 Inside Diameter
• .965 Outside Diameter
• .141 Thickness
• .188 Width

• Description: Regular: A coiled, hardened, split circular washer with a slightly trapezoidal wire section.
• Applications/ Advantages: Regular: (A) Applies greater bolt tension per unit of applied torque; (B) Provides a hardened bearing surface, creating more uniform torque control; (C) Provides more uniform load distribution; (D) Resists loosening caused by vibration and corrosion; (E) Is preferred lock washer for use with hardened bearing surfaces.
• Material: Carbon Steel: SAE J403 1055 - 1065 carbon steel.
• Hardness: Carbon & High-Alloy Steel: Rockwell C38 - 46
• Twist Test: With the washer in a vice with the split ends free and straight above the vice jaws, a 90°segment of the free end is gripped with a wrench and bent. Washers are to withstand being twisted through a 90° angle without signs of fracture. When the washer ultimately fractures beyond the prescribed 90° limit, the structure at the breaking point shall show a fine grain.