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Reinforcement: Spiral synthetic yarn (3/16”– 1 1/2”)
This is the most common plug size in the US
We have had zero returns or issues in nearly a decade of offering these
The most common fire fitting thread in the United States is 2 1/2 inch NH /NST
Designed for 4"
Domestic Brass Pin Lug 2 1/2" NH Cap Pick One Side_5 inch Reinforcement: Spiral synthetic yarn (3/16”–Brass caps are for protection of fire hoses, pipes or valve fittings. Gasket installed. Safety Note Not intended for pressure applications for protection only. WARNING: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. Do not use in connection with drinking water. Wash hands after handling.