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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
27624 PAUL R. BRILES INC. DBA PB FASTENERS

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AATN SHOULDER DIAMETER 0.194 INCHES NOMINAL FIRST SHOULDER
AHYM NOMINAL THREAD DIAMETER 0.190 INCHES
CRSQ COUNTERSINK ANGLE 100.0 DEGREES NOMINAL
AATX SHOULDER LENGTH 0.485 INCHES NOMINAL FIRST SHOULDER
AASB FASTENER LENGTH 0.844 INCHES NOMINAL
CWYB SHOULDER SHAPE ROUND FIRST SHOULDER
ABQZ INTERNAL DRIVE STYLE CROSS RECESS TYPE 1
AAJF THREAD DIRECTION RIGHT-HAND
AASK HEAD STYLE FLAT COUNTERSUNK
THSD THREAD SERIES DESIGNATOR UNF
AASA THREAD LENGTH 0.319 INCHES MINIMUM
AASL HEAD DIAMETER 0.276 INCHES NOMINAL
AAJD THREAD CLASS 2A
MATT MATERIAL STEEL COMP 4037 OVERALL
CMLP THREAD QUANTITY PER INCH 32
CQFM HARDNESS RATING 33.0 ROCKWELL C NOMINAL OVERALL
SFTT SURFACE TREATMENT CADMIUM OVERALL

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