The closest would be 18 gauge which is 1.27 mm
Metal gauge is inversely proportional to thickness, the bigger the thickness lesser the gauge. Following is conversion table:- 10 G : 3.15 MM 11 G : 2.8 MM 12 G : 2.5 MM etc....
4mm sheet metal falls 24 gauge and 25 gauge. 24 gauge sheet metal is 3.175mm (0.125") thick, and 25 gauge sheet metal is 6.35 (0.25") mm thick.
0.0747 inch. or 1.89 mm
122 mm
122 mm = 4.80314 " Direct Conversion Formula 122 mm* 1 in 25.4 mm = 4.803149606 in
SP 152 MM, SP 122 MM, 122 MM Towed
If it is steel, the thickness is 0.0359 ins (35.9 thou), or 0.9119 mm. See Wikipedia 'Sheet Metal Gauge' for a full table of thicknesses
10 gauge: 3.57 mm11 gauge: 3.18 mm
7/64ths of an inch, or .109375 inches, or 2.77 mm.
122 millimeters is 0.4 feet.
2.5mm=.098 of an inch or 63/640 ( that is a fraction) Direct Conversion Formula 2.5 mm* 1 in 25.4 mm = 0.09842519685 in
it is special