This standard specifies the type, basic parameters and dimensions, technical requirements, inspection methods, signs and packaging of depth vernier calipers. This standard applies to depth vernier calipers (hereinafter referred to as "calipers") with vernier readings of 0.02mm and 0.05mm and a maximum measurement depth of 500mm.
GB/T 1214.4-1996 history
2008GB/T 21388-2008 Vernier,dial and digital display depth callipers
1996GB/T 1214.4-1996 The depth gauge for callipers of vernier type
GB/T 1214.4-1996 The depth gauge for callipers of vernier type was changed to GB/T 21388-2008 Vernier,dial and digital display depth callipers.