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		                        | National Stock Number:
 1005-01-462-4306
 
 Federal Supply Class:
 1005
 
 National Item Identification Number:
 014624306
 
 Description:
 BARREL,AUTOMATIC GUN
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 Manufacturer Information:
 
 | 12011624 | 05606 | GENERAL DYNAMICS-OTS, INC. |  | 12011624 | 19200 | US ARMY ARDEC RDECOM |  | 12011624 | 26978 | GENERAL DYNAMICS - OTS, INC. | 
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 Techincal Specification:
 
 | FSC APPLICATION DATA | CANNON, 20MM, ANTIAIRCRAFT GUN |  | GROOVE WIDTH | 0.201 INCHES MINIMUM AND 0.209 INCHES MAXIMUM |  | LAND WIDTH | 0.082 INCHES NOMINAL |  | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-46047 MIL SPEC SINGLE MATERIAL RESPONSE |  | MATERIAL | STEEL UNS K14185 |  | OVERALL LENGTH | 59.843 INCHES MINIMUM AND 59.968 INCHES MAXIMUM |  | SPECIAL FEATURES | BARREL HARDNESS, ROCKWELL C SCALE 32 TO 37; SURFACE PHOSPHATE, MIL-P-16232, TYPE M, CLASS 2;INSIDE SURFACE TREATMENT IS CHROMIUM, PER 12913468 |  | RIFLE BORE GROOVE QUANTITY | 9 |  | RIFLING DIRECTION | RIGHT-HAND |  | SIZE DESIGNATION | 20 MILLIMETER |  | SURFACE TREATMENT | PHOSPHATE LOCATION NOT OTHERWISE SPECIFIED |  | SURFACE TREATMENT | CHROMIUM INSIDE |  | WEAPON MODEL NUMBER | M61A1, M197 |  | WEAPON SIZE DESIGNATION | 20 MILLIMETER | 
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