DIN 2999-1-1983
管子和管件用管螺纹.圆柱形内螺纹和锥形外螺纹.螺纹尺寸

德国进口DIN 2999螺纹环规 R1"

DIN2999是德国的密封管螺纹标准，ISO228是国际标准，用于非密封管螺纹。这两种内螺纹非常相似但不一样 ，前者是具有密封性的，后者不具备密封性。两者的制作公差带不一样，原则上不能相互代替。（完全正确，这两类螺纹只是牙形一致，或者说来源属于近亲，但是完全不一样的，DIN 2999是密封的 ，对于牙高之类的有明确要求，而ISO 228属于直管螺纹，没有密封性要求）

ISO 288螺纹是非密封性管螺纹,而DIN 2999 螺纹是密封性管螺纹,两者不同.DIN 2999 螺纹等同于ISO 7-1 (注意这个说法是不完全争取，DIN 2999是锥柱配合螺纹，ISO 7-1 包含锥锥配合，同时也包含锥柱配合)

德国进口DIN 2999螺纹环规 R2"

DIN 2999-1:1983-07 《Pipe threads for tubes and fittings; parallel internal thread and taper external thread; tread dimensions》被 DIN EN 10226-1:2004-10 代替。

DIN EN 10226-1:2004-10 《Pipe threads where pressure tight joints are made on the threads - Part 1: Taper external threads and parallel internal threads - Dimensions, tolerances and designation; German version EN 10226-1:2004》

  DIN 2999-2:1973-08 《Whitworth Pipe Threads for Tubes and Fittings; Cylindrical Internal Thread and Conical External Thread, Gauging System and Use of Gauges》被 DIN EN 10226-3:2005-05 代替。

DIN EN 10226-3:2005-05 《Pipes threads where pressure tight joints are made on the threads - Part 3: Verification by means of limit gauges; German version EN 10226-3:2005》

DIN 2999-3:1973-08 《Whitworth Pipe Threads for Tubes and Fittings; Gauge Dimensions》 被 DIN EN 10226-3:2005-05 代替。

DIN 2999-4:1986-11 《Pipe threads for tubes and fittings; sizes for taper screw limit plug gauges for parallel internal thread》被 DIN EN 10226-3:2005-05 代替。

DIN 2999-5:1973-08 《Whitworth Pipe Threads for Tubes and Fittings; Cylindrical Screw Limit Ring Gauges for Gauging Conical External Threads, Sizes》被 DIN EN 10226-3:2005-05 代替。

DIN 2999-6:1975-01 《Whitworth Pipe Threads for Tubes and Fittings; Conical Screw Check Plugs, Sizes》被 DIN EN 10226-3:2005-05 代替。

DIN 2999螺纹环规

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