UNC. 美制牙規格. UNF. M2 × 0.4. M12 × 1.75. W1/8-40. UNC 2-56. UNF 8-36. M2.5 × 0.45. M14 × 1.0. W5/32-32. UNC 4-40. UNF 10-32. M2.6 × 0.45. M14 × 1.5. W3/16-24.
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