McMaster 94895A823 SAE Grade 8 High Strength Steel Hex Nut, Pack of 50, Zinc Yellow Chromate Plated, 1 2" 13 Thread 7530 01 562 3259 Material Heavy Duty Polyester Tag Material Heavy Duty Polyester Tag Shape Rectangle Tag Color Black on Yellow Legend This Scaffold Does Not Meet Federal State OSHA Specifications All Employees Working From This Scaffold Must Wear And Use An Approved Safety Harness Series Delta(TM) Harness Application Welding Webbing Material Nomex(R) Kevlar(R) Harness Style Vest Includes Padding No D Ring Locations Back Hex Nut Profile Standard Material Zinc Yellow Chromate Plated Steel Thread Size 1 2" 13 Width 3 4" Height 7 16" Fastener Strength Grade Class SAE Grade 8 Drive Style External Hex Nut Type Hex Thread Spacing Coarse Thread Type UNC Pack Size 50 per pack Country of Origin Canada Schedule B Number 731816 SAE Grade 8 high strength steel hex nut with zinc yellow chromate plating for corrosion resistance in wet and outdoor environments