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National Stock Number:
5133-00-411-2333
Federal Supply Class:
5133
National Item Identification Number:
004112333
Description:
COUNTERSINK
Detail:
AN ANGULAR CUTTING TOOL, USUALLY MADE WITH ANGULAR RELIEF, HAVING ONE OR MORE FLUTES WITH SPECIFIC SIZE ANGLE CUTTING EDGES. IT IS USED FOR CHAMFERING AND COUNTERSINKING HOLES. THE TOOL MAY HAVE A STRAIGHT SHANK, TAPERED SHANK, BIT STOCK SHANK OR SPECIAL SHANK REQUIRING A SPECIAL HOLDER, FOR HOLDING IN A POWER- OR HAND-OPERATED MACHINE. IT MAY BE DESIGNED TO BE DRIVEN OR TURNED BY MEANS OF A WRENCH OR CARPENTER'S BRACE. FOR ITEMS REQUIRING A HOLDER BUT THE HOLDER IS NOT INCLUDED, USE CUTTER, COUNTERSINK.
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Manufacturer Information:
| MM312-4 | 08295 | MARTIN AIRCRAFT TOOL COMPANY |
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Techincal Specification:
| MATERIAL | STEEL OVERALL | | HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND | | 53.0 ROCKWELL C MAXIMUM | | CUTTING END STYLE | STRAIGHT FLUTE POINT END | | BODY DIAMETER | 0.438 INCHES NOMINAL | | INCLUDED ANGLE | 78.0 DEGREES NOMINAL | | SHANK STYLE | STRAIGHT ROUND | | SHANK DIAMETER | 0.250 INCHES NOMINAL | | OVERALL LENGTH | 1.688 INCHES MINIMUM AND | | 2.250 INCHES MAXIMUM | | CUTTING ROTATION DIRECTION | RIGHT-HAND | | FLUTE QUANTITY | 3 |
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