A-A-478
September 26, 1979
COMMERCIAL ITEM DESCRIPTION
DRILL, TWIST, DOUBLE END
The General Services Administration has authorized the use of this
Commercial Item Description
Salient characteristics:
Double-ended (both ends pointed) design.
Suitable for drilling holes in 1/4 inch thick stainless steel or alloy steels with a Rockwell C hardness of less than 45.
Drill point angle 135 degrees, plus or minus 5 degrees.
Split point (except 1/16 inch size).
Material M1, M2, M7 or M10 high speed steel
Flute hardness Rockwell C 63-66.
Corrosion resistant surface or black oxide treated on all surfaces except the points.
Except for the 1/16 inch size, permanently and legibly marked with manufacturer’s identification, drill size, and “HS”, “HSS”, or “High Speed”
Overall length tolerance plus or minus 1/4 inch
Six drills to a package.
Furnished under the following National Stock Numbers (NSN’s) and sizes as specified:
|
NSN |
Dimensions |
|
5133-00-241-5919 |
1/16 inch diameter, 1-5/8 inches overall length |
|
5133-00-241-5914 |
3/32 inch diameter, 1-3/4 inches overall length |
|
5133-00-241-5686 |
Size 41 diameter, 1-13/16 inches overall length |
|
5133-00-507-6222 |
Size 40 diameter, 1-13/16 inches overall length |
|
5133-00-133-4240 |
1/6 inch diameter, 1-7/10 inches overall length |
|
5133-00-132-0379 |
Size 30 diameter, 1-15/16 inches overall length |
|
5133-00-133-4242 |
Size 27 diameter, 2 inches overall length |
|
5133-00-241-5771 |
5/32 inch diameter, 2-1/16 inches overall length |
|
5133-00-133-4254 |
Size 21 diameter, 2-1/8 inches overall length |
|
5133-00-290-3925 |
Size 20 diameter, 2-1/8 inches overall length |
|
5133-00-133-4255 |
Size 17 diameter, 2-1/8 inches overall length |
|
5133-00-241-5823 |
3/16 inch diameter, 2-3/16 inches overall length |
|
5133-00-290-3918 |
Size 11 diameter, 2-1/4 inches overall length |
|
5133-00-133-4258 |
Size 10 diameter, 2-1/4 inches overall length |
|
5133-00-133-4278 |
Size 7 diameter, 2-3/4 inches overall length |
|
5130-00-290-3923 |
1/4 inch diameter, 2-1/2 inches overall length |
|
5130-00-290-3883 |
Size F diameter, 2-5/8 inches overall length |
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