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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
55566 R A F ELECTRONIC HARDWARE INC

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AASU HEAD HEIGHT 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM
ABQZ INTERNAL DRIVE STYLE SLOT
AASB FASTENER LENGTH 0.312 INCHES NOMINAL
MDCL MATERIAL DOCUMENT AND CLASSIFICATION ASTM A 108 ASSN STD ALL MATERIAL RESPONSES OVERALL
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SFTT SURFACE TREATMENT ZINC OVERALL AND CHROMATE OVERALL
CWYB SHOULDER SHAPE ROUND FIRST SHOULDER
AATX SHOULDER LENGTH 0.125 INCHES MINIMUM FIRST SHOULDER AND 0.127 INCHES MAXIMUM FIRST SHOULDER
AAJF THREAD DIRECTION RIGHT-HAND
AASK HEAD STYLE FLAT CHAMFER
MATT MATERIAL STEEL OVERALL
AATN SHOULDER DIAMETER 0.155 INCHES MINIMUM FIRST SHOULDER AND 0.157 INCHES MAXIMUM FIRST SHOULDER
AASA THREAD LENGTH 0.125 INCHES MINIMUM AND 0.187 INCHES MAXIMUM
THSD THREAD SERIES DESIGNATOR UNC
AAJD THREAD CLASS 2A
AASL HEAD DIAMETER 0.277 INCHES MINIMUM AND 0.285 INCHES MAXIMUM
CMLP THREAD QUANTITY PER INCH 32
AHYM NOMINAL THREAD DIAMETER 0.138 INCHES

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