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 001 in Number of Measuring 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 Warehouse Tape Sub Type General Purpose Foil Tape Tape Elongation Not Rated Product Form Continuous Roll Liner Material Not Applicable Sub Brand Not Applicable Tape Tensile Strength 26 lb in Tape Color Silver Liner Included No Liner Tape Resistance Properties UV Resistant Specifications Met FAR Washer Designation General Purpose Material Zinc Yellow Chromate Plated Steel For Screw Size 3 8" ID 0 these withstand occasional exposure to moisture