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Part Number:
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Item Name:
SCREW , CLOSE TOLERANCE

Definition:

A SCREW, MACHINE OR SCREW, CAP, SOCKET HEAD WHOSE UNTHREADED PORTION IS OF SPECIFIED GRIP LENGTH, PLATED OR UNPLATED, AND IS MACHINED TO A TOLERANCE OF ONE THOUSANDTH (0.001 IN.) (0.025 MM) OR LESS OF A SPECIFIC DIAMETER FOR ITEMS (1.000 IN.) (25 MM) OR LESS IN DIAMETER. ITEMS OVER (1.000 IN.) (25 MM) IN DIAMETER SHALL HAVE A TOLERANCE OF FIFTEEN TEN THOUSANDTHS (0.0015 IN.) (0.038 MM) OR LESS. THE NOMINAL MAJOR DIAMETER OF THE THREADS SHALL BE AT LEAST ONE THOUSANDTH (0.001 IN.) (0.025 MM) BELOW THE MINIMUM SHANK DIAMETER, BUT NOT BELOW THE MINIMUM MAJOR DIAMETER FOR APPLICABLE CLASS OF FIT, AS SHOWN IN THE SCREW THREAD STANDARDS, FED STD H28 AND/OR OTHER NATIONALLY RECOGNIZED STANDARDS. THE HEAD IS DESIGNED TO BE HELD OR DRIVEN WITH AN INSERTED DRIVER. IT IS NOT DESIGNED FOR ROTATION BY THE THUMB AND FINGERS. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS.

CAGE Information

Code Company
81755 LOCKHEED MARTIN CORPORATION DBA LOCK

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
CSYM SURFACE FINISH 32.0 MICROINCHES THREADS
CRSQ COUNTERSINK ANGLE 59.75 DEGREES MINIMUM AND 60.25 DEGREES MAXIMUM
CMLP THREAD QUANTITY PER INCH 24
CSYM SURFACE FINISH 32.0 MICROINCHES GRIP
AASB FASTENER LENGTH 1.245 INCHES MINIMUM AND 1.275 INCHES MAXIMUM
AAUR GRIP DIAMETER 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM
AASL HEAD DIAMETER 0.531 INCHES MINIMUM AND 0.558 INCHES MAXIMUM
SFTT SURFACE TREATMENT NICKEL OVERALL AND CADMIUM OVERALL
FEAT SPECIAL FEATURES BEARING SURFACE OF HEAD GROOVED TO 0.394 IN. MIN,0.396 IN. MAX DIA,0.092 IN. MIN,0.097 IN. MAX FROM TOP OF HEAD
AAJD THREAD CLASS 3A
AASA THREAD LENGTH 0.423 INCHES MINIMUM AND 0.473 INCHES MAXIMUM
AAJF THREAD DIRECTION RIGHT-HAND
AASK HEAD STYLE FLAT COUNTERSUNK
CQBC MINIMUM TENSILE STRENGTH 220000 POUNDS PER SQUARE INCH
THSD THREAD SERIES DESIGNATOR UNF
ANEE GRIP LENGTH 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION AMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL
MDCL MATERIAL DOCUMENT AND CLASSIFICATION AMS6485 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATT MATERIAL STEEL COMP H11 OVERALL
ABQZ INTERNAL DRIVE STYLE OFFSET CRUCIFORM (TORQUE SET)
AHYM NOMINAL THREAD DIAMETER 0.312 INCHES

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