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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
26512 NORTHROP GRUMMAN SYSTEMS CORPORATION

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416,TY2,CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
AHYM NOMINAL THREAD DIAMETER 0.190 INCHES
MATT MATERIAL STEEL COMP 4037 OVERALL OR STEEL COMP 8740 OVERALL
CRSQ COUNTERSINK ANGLE 100.0 DEGREES NOMINAL
ABQZ INTERNAL DRIVE STYLE SLOT
AATX SHOULDER LENGTH 0.225 INCHES MINIMUM FIRST SHOULDER AND 0.255 INCHES MAXIMUM FIRST SHOULDER
CQFM HARDNESS RATING 33.0 ROCKWELL C MINIMUM OVERALL AND 37.0 ROCKWELL C MAXIMUM OVERALL
AASA THREAD LENGTH 0.284 INCHES MINIMUM AND 0.344 INCHES MAXIMUM
CWYB SHOULDER SHAPE ROUND FIRST SHOULDER
AAJF THREAD DIRECTION RIGHT-HAND
AASB FASTENER LENGTH 0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM
AASK HEAD STYLE FLAT COUNTERSUNK
AATN SHOULDER DIAMETER 0.193 INCHES MINIMUM FIRST SHOULDER AND 0.194 INCHES MAXIMUM FIRST SHOULDER
THSD THREAD SERIES DESIGNATOR UNF
AASL HEAD DIAMETER 0.276 INCHES NOMINAL
AAJD THREAD CLASS 2A
CQBC MINIMUM TENSILE STRENGTH 150000 POUNDS PER SQUARE INCH
SFTT SURFACE TREATMENT CADMIUM OVERALL AND CHROMATE OVERALL
CMLP THREAD QUANTITY PER INCH 32
MDCL MATERIAL DOCUMENT AND CLASSIFICATION AISI ASSN STD ALL MATERIAL RESPONSES OVERALL

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