限界螺紋牙規. 1-46. 規格. 限界螺紋栓規. 6300. 5000. 4500. 4000. 4000. NO 1-64 UNC. 2-56. 3-48. 4-40. 5-40. NO. UNC. NO. UNC. NO. UNC. NO. UNC. 限界螺紋環規.
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