GAGE, PLUG, THREAD, SETTING, CLASS W, FOR LO (NOT GO), GAGES, UNIFIED STANDARD CLASSES 2A AND 3A AND AMERICAN NATIONAL STANDARD CLASS 3 EXTERNAL THREADS (NO S/S DOCUMENT) (SUPERSEDING MIL-STD-274A)
W级螺纹固定塞规 用于LO(非GO) 统一标准2A和3A级和美国国家标准3级外螺纹规(无S/S文件)(取代MIL-STD-274A)