標準號：BS 919-4-2007
中文標準名稱：螺紋規限值和公差.直徑1/4 in.及以上的統一型螺紋量規的尺寸限值
英文標準名稱：Screw gauge limits and tolerances - Limits of size for gauges for screw threads of unified form diameters 1/4 in and larger
標準類型：J04
發布日期：2007/10/31 12:00:00
實施日期：2007/10/31 12:00:00
中國標準分類號：J04
國際標準分類號：21.040.10
適用范圍：This British Standard specifies the limits of size for the following typesof gauges, setting plugs and check plugs for the various classes ofstandard Unified Coarse (UNC), Unified Fine (UNF) and Unified ExtraFine (UNEF) threads specified in BS 1580-1.a) GO and NOT GO screw gauges:1) screw plug gauges;2) solid screw ring gauges;3) adjustable screw ring gauges;4) adjustable screw calliper gauges.b) Setting plugs for GO and NOT GO adjustable screw ring gauges andfor GO and NOT GO adjustable screw calliper gauges:1) double length type;2) single length type.c) GO and NOT GO check plugs for solid screw ring gauges.d) GO and NOT GO plug gauges and GO and NOT GO calliper gauges forthe crest diameters of product threads.NOTE The values tabulated in this standard have been derived from theapplication of the tolerances specified in BS 919-1 to the limits of sizegiven in BS 1580, and reference should be made to the former standardfor general information, details of the form of thread for Unified screwgauges, and tolerances on pitch and thread angle.