McMaster 54375T12 Three-Position Fit Earmuffs 29 dB Noise Reduction Rating (Over Head Fit) 30G273 300 psi Internal Thread Class

300 psi Internal Thread Class 2B Brinell Hardness 163 External Thread Class 2A Power Driver 4ZE60 Application For Use on Metal Finish Black Phosphate

HB or better for Plugs and Connectors Environmental - Moisture Resistance - IP30 Suitability Environmental - Operating Temperatures - Maximum Continuous 75°C

Harness Sizing Universal (S/M/L/XL)

1 3/4 in Pentagon Head Material Ductile Iron Product Type Hydrant Wrench For Fitting Type Pentagon Nut

McMaster 54375T12 Three-Position Fit Earmuffs 29 dB Noise Reduction Rating (Over Head Fit) 30G273 300 psi Internal Thread ClassEarmuffs should be worn with the specified fit to offer proper protection and noise reduction. You can wear Style C earmuffs over the head, behind the head, and under the chin. Style C Application Noise Reduction Garment Earmuffs Fit (Noise Reduction Rating) Over Head (29 dB), Behind Head (28 dB), Under Chin (28 dB) Ear Cup Material Plastic Color Black with Red Trim Ear Cushion Material Foam Headband Material Plastic Features Adjustable Headband