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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
04729 UNICORP

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AHYM NOMINAL THREAD DIAMETER 0.190 INCHES
CWYB SHOULDER SHAPE ROUND ALL SHOULDERS
MDCL MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-764, COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
AASK HEAD STYLE PAN NO. 2
AATX SHOULDER LENGTH 0.531 INCHES NOMINAL ALL SHOULDERS
MATT MATERIAL STEEL COMP 303 OVERALL
ASDB WIDTH ACROSS FLATS 0.099 INCHES NOMINAL
AASL HEAD DIAMETER 0.375 INCHES NOMINAL
AASB FASTENER LENGTH 0.812 INCHES NOMINAL
AAJF THREAD DIRECTION RIGHT-HAND
CXCY PART NAME ASSIGNED BY CONTROLLING AGENCY SCREW, SHOULDER
FEAT SPECIAL FEATURES BETWEEN SHOULDER AND THREADS THEIRS 1 1/2 THSD UNDERCUT, WITH END 45 DEGREES CHAMFER. BETWEEN SHOULDER AND THE HEAD THEIRS .031 WIDTH CUTDOWN.
AGAV END ITEM IDENTIFICATION AN/ARK222 SIN
THSD THREAD SERIES DESIGNATOR UNF
AASU HEAD HEIGHT 0.190 INCHES NOMINAL
AAJD THREAD CLASS 2A
ABQZ INTERNAL DRIVE STYLE HEXAGON
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION MIL-F-14072-A (EL) E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
CMLP THREAD QUANTITY PER INCH 32
AASA THREAD LENGTH 0.250 INCHES NOMINAL
SFTT SURFACE TREATMENT PASSIVATE OVERALL
AATN SHOULDER DIAMETER 0.249 INCHES NOMINAL ALL SHOULDERS

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