Mierka závitová pre závit Whitworth 55 + G (28 šablón), 4-62, STN 254621
rozteč listov: 62g; 60G = W1/16; 48G = W3/32; 40G = W1/8; 36G; 32G = G5/32; 30G; 28G; 26G; 25G; 24G = W3/16; 22G; 20G = W1/4; 19G; 18G = W5/16; 16G = W3/8; 14G = W7/16; 13G; 12G; 11G = W5/6; 10G = W3/4; 9G = W7/8; 8G = W1; 7G = W1 1/8, W1 1/4; 6G = W1 1/8 1 1/2; 5G = W1 5/8, W1 3/4; 4 1/2G = W7/8 2; 4G = W2 1/4, W2 1/2