N.Y. Comp. Codes R. & Regs. tit. 9, § 205.12
Standard thread for fire service use in the State of New York.
Executive Department
- (a) Pursuant to the requirement of law in subdivision 4 of section 209-e of the General Municipal Law, the “American National Standard” thread as hereinafter set out in full, is hereby prescribed as the standard thread for the State.
(b) The thread standards of the State of New York are those of the National Bureau of Standards, U.S. Department of Commerce, Washington, D.C. The standards are the same as those presented by the National Fire Protection Association, the National Board of Fire Underwriters and the American Standards Association.
AMERICAN NATIONAL THREAD (NH)
MAXIMUM (BASIC) NIPPLE DIMENSIONS
Nominal Size of Hose No. of Threads Per Inch Pitch Depth of Thread Major Diameter "D" Pitch Diameter "E" Minor Diameter "K" Allowance ¾″, 1″ 8 .12500 .08119 1.3750 1.2938 1.2126 .0120 1 ½″ 9 .11111 .07217 1.9900 1.9178 1.8457 .0120 2 ½″ 7 ½ .13333 .08660 3.0686 2.9820 2.8954 .0150 3″ 6 .16667 .10825 3.6239 3.5156 3.4073 .0150 3 ½″ 6 .16667 .10825 4.2439 4.1356 4.0273 .0200 4 ½″ 4 .25000 .16238 5.7609 5.5985 5.4361 .0250 AMERICAN NATIONAL THREAD (NH)
MAXIMUM (BASIC) COUPLING DIMENSIONS
Nominal Size of Hose No. of Threads Per Inch Pitch Depth of Thread Major Diameter "D" Pitch Diameter "E" Minor Diameter "K" Allowance ¾″, 1″ 8 .12500 .08119 1.3870 1.3058 1.2246 1 ½″ 9 .11111 .07217 2.0020 1.9298 1.8577 2 ½″ 7 ½ .13333 .08660 3.0836 2.9970 2.9104 3″ 6 .16667 .10825 3.6389 3.5306 3.4223 3 ½″ 6 .16667 .10825 4.2639 4.1556 4.0473 4 ½″ 4 .25000 .16238 5.7859 5.6235 5.4611
)
)