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Part Number

Part Number:
NSN:
NIIN:
Item Name:
SCREW , SHOULDER

Definition:

AN EXTERNALLY THREADED FASTENER WHOSE THREADED PORTION IS OF ONE NOMINAL DIAMETER, NO 0 (0.060 IN.) (1.5 MM) OR LARGER. IT HAS A ROUND UNTHREADED NECK OR SHANK ALL OR PART OF WHICH IS OF GREATER DIAMETER THAN THE THREADED PORTION. THE HEAD IS DESIGNED TO BE DRIVEN WITH EITHER A WRENCH OR AN INSERTED DRIVER OR BOTH IN SIZES BELOW NO. 10 (0.190 IN.) (5 MM) NOMINAL DIAMETER. NO. 10 (0.190 IN.) (5 MM) AND LARGER SIZES MUST BE DESIGNED FOR ANY TYPE OF INSERTED DRIVER, BUT MAY ALSO PROVIDE FOR EXTERNAL WRENCHING OF THE HEAD. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. FOR ITEMS WHICH ARE BOTH SHOULDERED AND HAVE AN EXTERNALLY RELIEVED BODY, USE SCREW, EXTERNALLY RELIEVED BODY. FOR ITEMS WITH A NO. 10 (0.190 IN.) (5 MM) OR LARGER THREAD DIAMETER WITHOUT AN INSERTED DRIVER HEAD, USE BOLT, SHOULDER. EXCLUDES BOLT, INTERNAL WRENCHING AND SCREW, CAP, SOCKET HEAD.

CAGE Information

Code Company
80063 US ARMY COMMUNICATIONS & ELECTRONICS

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AHYM NOMINAL THREAD DIAMETER 0.190 INCHES
CMLP THREAD QUANTITY PER INCH 24
MATT MATERIAL STEEL CORROSION RESISTING OVERALL
AASA THREAD LENGTH 0.375 INCHES NOMINAL
AATN SHOULDER DIAMETER 0.246 INCHES MINIMUM FIRST SHOULDER AND 0.248 INCHES MAXIMUM FIRST SHOULDER
CWYB SHOULDER SHAPE ROUND FIRST SHOULDER
AAJF THREAD DIRECTION RIGHT-HAND
MDCL MATERIAL DOCUMENT AND CLASSIFICATION ASTMA276, 300 SERIES ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR ASTMA582, 300 SERIES ASSN STD SINGLE MATERIAL RESPONSE OVERALL
AATX SHOULDER LENGTH 0.495 INCHES MINIMUM FIRST SHOULDER AND 0.505 INCHES MAXIMUM FIRST SHOULDER
AASL HEAD DIAMETER 0.357 INCHES MINIMUM AND 0.375 INCHES MAXIMUM
AASB FASTENER LENGTH 0.875 INCHES NOMINAL
THSD THREAD SERIES DESIGNATOR UNC
AAJD THREAD CLASS 2A
ASDB WIDTH ACROSS FLATS B0.125 SINGLE THROUGH HOLE WITH THREADED INSERT NOMINAL AND 0.127 INCHES MAXIMUM
AASU HEAD HEIGHT 0.177 INCHES MINIMUM AND 0.188 INCHES MAXIMUM
ABQZ INTERNAL DRIVE STYLE HEXAGON
AASK HEAD STYLE FLAT FILLISTER

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