McMaster 98023A117 Zinc Yellow Chromate Plated SAE Grade 8 Steel Washer, for 3 8" Screw Size, 0.406" ID, 0.812" OD, US Origin, Pack of 50 SRM40PD 0400 SL Lifeline Length 60 ft Lifeline Length 60 ft 001 in Number of Measuring Rods 1 Long Form Calibration Certificate No Thimble Ratchet Movement of Screw 1 in Number of Gauges 1 Rod Type Solid Includes Rods with Flat End Anvil Flat Rotating Spindle (Yes No) Yes Features Top Installing Rods for Increased Stability Spindle Flat Lock Nut Type Screw Anvil Material Steel Spindle Material Steel Included Certification No Anvil Shape Flat Maximum Measurement Inch 1 in Minimum Measurement Inch 0 in Operation Type Mechanical Spindle Shape Flat Thimble Type Ratchet Case Included Yes Accuracy + 0 1 System of Measurement Inch Washer Type Flat Country of Origin United States DFARS Compliance Specialty Metals Compliant (252 these are commonly used when fastening components in valves