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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
28972 FASTENER ENGINEERING CORP

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
CRSQ COUNTERSINK ANGLE 100.0 DEGREES NOMINAL
CRSQ COUNTERSINK ANGLE 100.0 DEGREES NOMINAL
AATN SHOULDER DIAMETER 0.141 INCHES MINIMUM FIRST SHOULDER AND 0.143 INCHES MAXIMUM FIRST SHOULDER
CQFM HARDNESS RATING 33.0 ROCKWELL C MINIMUM OVERALL AND 37.0 ROCKWELL C MAXIMUM OVERALL
CWYB SHOULDER SHAPE ROUND FIRST SHOULDER
AATX SHOULDER LENGTH 0.362 INCHES NOMINAL FIRST SHOULDER
ABQZ INTERNAL DRIVE STYLE CROSS RECESS TYPE 1
AAJF THREAD DIRECTION RIGHT-HAND
AASK HEAD STYLE FLAT COUNTERSUNK
MATT MATERIAL STEEL OVERALL
AASA THREAD LENGTH 0.225 INCHES MINIMUM
THSD THREAD SERIES DESIGNATOR UNC
AAJD THREAD CLASS 2A
AASB FASTENER LENGTH 0.625 INCHES NOMINAL
CQBC MINIMUM TENSILE STRENGTH 150000 POUNDS PER SQUARE INCH
AASL HEAD DIAMETER 0.223 INCHES NOMINAL
CMLP THREAD QUANTITY PER INCH 32
AHYM NOMINAL THREAD DIAMETER 0.138 INCHES
SFTT SURFACE TREATMENT CADMIUM OVERALL

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