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NPT is defined by ANSI/ASME standard B1.20.1. [ 4 ] The taper rate for all NPT threads is 1 inch of diameter in 16 inches of length ( 3 ⁄ 4 inch per foot or 62.5 millimeters per meter) measured by the change of diameter (of the pipe thread) over distance of thread.
The 4.6×30mm (designated as the 4,6 × 30 by the C.I.P.) [6] cartridge is a small-caliber, high-velocity, smokeless powder, rebated, bottleneck, centerfire cartridge designed for personal defense weapons (PDW) developed by German armament manufacturer Heckler & Koch (HK) in 1999.
T1IIJ = 110 cartridges .50 linked (API M8), 55 linked rounds per carton, 1 carton per M10 ammo can, 2 × M10 ammo cans per M12 wooden crate. Gross Weight: 44 lbs. Volume: 0.7 cubic feet. T1IIM = 110 cartridges .50 linked (4 × API M8, 1 × INC M1), 55 linked rounds per carton, 1 carton per M10 ammo can, 2 × M10 ammo cans per M12 wooden crate.
A spitzer bullet (from German: Spitzgeschoss, "point shot") is a munitions term, primarily regarding fully-powered and intermediate small-arms ammunition, describing bullets featuring an aerodynamically pointed nose shape, called a spire point, sometimes combined with a tapered base, called a boat tail (then a spitzer boat-tail bullet), in order to reduce drag and obtain a lower drag ...
Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point.. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name.
I can confirm that BSP and NPT are only vaguely compatible as tapered threads in the 3/4" and 1/2" nominal pipe sizes, 0.84 and 1.05 O.D. respectively but the threads are cut at different angles 55° vs 60° and cut with rounded vs straight peaks and valleys.
Gas checks are most commonly found in the form of a thin cup or disc made of a ductile metal. Copper, zinc, aluminum, and alloys such as brass have been used. A bullet designed to accept a gas check has a rebated base shank which permits attachment of the check without altering the maximum diameter of the bullet.
As for the 4.6 vs 4,6 debate, it depends on the notation system used by the writer's country of origin. Many European nations do it 4,6 rather than 4.6. 4.6 is the standard used by Wikipedia because it is the most common. Fiocchi manufactures the civilian ammo and just calls it the 4.6 x 30. Another box depicts it as HK 4.6x30mm Police.