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Part Number

Part Number:
NSN:
NIIN:
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
80205 NATIONAL AEROSPACE STANDARDS COMMITT

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
CSYM SURFACE FINISH 32.0 MICROINCHES THREADS
MDCL MATERIAL DOCUMENT AND CLASSIFICATION AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE FASTENER OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
CSYM SURFACE FINISH 32.0 MICROINCHES GRIP
ANEE GRIP LENGTH 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM
MATT MATERIAL PLASTIC LOCKING FEATURE
HUES COLOR GREEN THREADS
MDCL MATERIAL DOCUMENT AND CLASSIFICATION MIL-F-18240 MIL SPEC SINGLE MATERIAL RESPONSE LOCKING FEATURE
THSD THREAD SERIES DESIGNATOR UNJF
CQBC MINIMUM TENSILE STRENGTH 160000 POUNDS PER SQUARE INCH
AAJD THREAD CLASS 3A
ZZZK SPECIFICATION/STANDARD DATA 80205-NAS7204 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
AHYM NOMINAL THREAD DIAMETER 0.250 INCHES
AASL HEAD DIAMETER 0.456 INCHES MINIMUM AND 0.508 INCHES MAXIMUM
CMLP THREAD QUANTITY PER INCH 28
ABQZ INTERNAL DRIVE STYLE CROSS RECESS TYPE 1
SFTT SURFACE TREATMENT CADMIUM FASTENER AND CHROMATE FASTENER
AAJF THREAD DIRECTION RIGHT-HAND
AASB FASTENER LENGTH 0.722 INCHES MINIMUM AND 0.752 INCHES MAXIMUM
AASK HEAD STYLE FLAT COUNTERSUNK
CRSQ COUNTERSINK ANGLE 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
CSYM SURFACE FINISH 63.0 MICROINCHES BEARING SURFACE OF HEAD
AAUM LOCKING FEATURE PELLET THREADS OR PATCH THREADS OR STRIP THREADS
AAUR GRIP DIAMETER 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
MATT MATERIAL IRON ALLOY 660 FASTENER
AASA THREAD LENGTH 0.400 INCHES MINIMUM AND 0.450 INCHES MAXIMUM

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