标准号:IS 12689-1989
发布日期:1990/4/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:This Indian Standard covers dimensions and other requirements for the subland twist drills with parallel shanks for producing clearance holes and counterbores for cheese head screws M3 to M10 — medium series conforming to IS 3406 ( Part 2) : 1986 'Dimensions for countersinks and counterbores : Part 2 Counterbores ( second revision )'.