All awl tube thread pre-coated PTEF leakproof gum, with excellent sealing property.
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本文介绍了锥管螺纹丝锥在万工显示上的测量原理、计算公式及测量方法。
This paper introduces the measuring principle, calculating formula and measuring method of the taps for taper pipe threads through the universal tool microscope.
The standard covers dimensions and gaging of plastic tapered National Pipe Threads (NPT) for leak-tight joints, and it is now referenced in all ASTM Standards for plastic piping products.