IS 12690-1989
Small Tools—SUBLAND Twist Drills with Morse Taper Shafts for Through and Countersunk Holes for Slotted Cylindrical Head Screws—Specification

Standard No.

IS 12690-1989

Release Date

1990

Published By

IN-BIS

Latest

IS 12690-1989

Scope

This standard covers dimensions and other requirements for the subland twist drills with morse taper shanks for producing clearance holes and counterbores for slotted cheese head screws of M5 to M20 — Medium series conforming to IS 3406 ( Part 2 ) : 1986 'Dimensions for counter-sinks and counterbores : Part 2 Counterbores ( second revision )'.

IS 12690-1989 history

• 1990 IS 12690-1989 Small Tools—SUBLAND Twist Drills with Morse Taper Shafts for Through and Countersunk Holes for Slotted Cylindrical Head Screws—Specification