McMaster 97135A250 High Strength Steel Nylon Insert Locknut, Pack of 10, Grade 8, Zinc Yellow Chromate Plated, 1 2" 13 Thread 58820 45 Hz to 500 Hz)2 45 Hz to 500 Hz)2 It has an ergonomic steel handle that gives you control over the wrench while protecting your hands from getting injured during use Thread Direction Right Hand Hex Nut Profile Standard Locking Type Nylon Insert Fastener Strength Rating High Finished Material Zinc Yellow Chromate Plated Steel Thread Size 1 2" 13 Width 3 4" Height 19 32" Fastener Strength Grade Class SAE Grade 8 Insert Maximum Temperature 185° F Drive Style External Hex Nut Type Hex High Strength System of Measurement Inch Pack Size 10 per pack Country of Origin Taiwan DFARS Compliance Not Specialty Metals Compliant Export Control Classification Number (ECCN) EAR99 REACH Compliance Not Compliant RoHS Compliance Not Compliant Schedule B Number 731816