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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
CMLP THREAD QUANTITY PER INCH 24
CSYM SURFACE FINISH 32.0 MICROINCHES GRIP
AASL HEAD DIAMETER 0.578 INCHES MINIMUM AND 0.633 INCHES MAXIMUM
THSD THREAD SERIES DESIGNATOR UNJF
AASB FASTENER LENGTH 1.017 INCHES MINIMUM AND 1.047 INCHES MAXIMUM
CQBC MINIMUM TENSILE STRENGTH 160000 POUNDS PER SQUARE INCH
AAJD THREAD CLASS 3A
AASA THREAD LENGTH 0.445 INCHES MINIMUM AND 0.495 INCHES MAXIMUM
ZZZK SPECIFICATION/STANDARD DATA 80205-NAS665 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
AAJF THREAD DIRECTION RIGHT-HAND
AASK HEAD STYLE FLAT COUNTERSUNK
CRSQ COUNTERSINK ANGLE 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
ANEE GRIP LENGTH 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM
AAUR GRIP DIAMETER 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM
MDCL MATERIAL DOCUMENT AND CLASSIFICATION NAS 621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATT MATERIAL TITANIUM ALLOY OVERALL
ABQZ INTERNAL DRIVE STYLE HIGH-TORQUE
AHYM NOMINAL THREAD DIAMETER 0.312 INCHES

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