Subland twist drills for holes prior to tapping screw threads. Basic dimensions
NORMA vydána dne 1.7.1990
Designation standards: GOST 28320-89
Note: NEPLATNÁ
Publication date standards: 1.7.1990
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: Russian technical standard
Kategorie: Technické normy GOST