标准号:IS 12688-1989
发布日期:1990/7/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:This standard covers dimensions and other requirements for the subland twist drills with morse taper shank for producing clearance holes and countersinks for countersunk head screws M5 to M14 conforming to IS 3406 (Part 1 ) : 1986'Dimensions for countersinks and counter-bores: Part 1 Countersinks ( second revision )'.