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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
AAUR GRIP DIAMETER 4.978 MILLIMETERS MINIMUM AND 4.990 MILLIMETERS MAXIMUM
CSYM SURFACE FINISH 0.8 MICROMETERS THREADS
AASL HEAD DIAMETER 9.0 MILLIMETERS MINIMUM AND 10.0 MILLIMETERS MAXIMUM
CQWR EXTERNAL THREAD TOLERANCE CLASS 4H6H
AHYM NOMINAL THREAD DIAMETER 5.0 MILLIMETERS
CQQR THREAD PITCH IN MILLIMETERS 0.8
ANEE GRIP LENGTH 7.8 MILLIMETERS MINIMUM AND 8.2 MILLIMETERS MAXIMUM
AAJF THREAD DIRECTION RIGHT-HAND
AASA THREAD LENGTH 8.5 MILLIMETERS MINIMUM AND 9.5 MILLIMETERS MAXIMUM
AASK HEAD STYLE FLAT COUNTERSUNK
MATT MATERIAL IRON ALLOY 660 OVERALL
THSD THREAD SERIES DESIGNATOR MJ
ZZZK SPECIFICATION/STANDARD DATA 80205-NA0042 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
CSYM SURFACE FINISH 0.8 MICROMETERS BEARING SURFACE OF HEAD
AASB FASTENER LENGTH 16.7 MILLIMETERS MINIMUM AND 17.3 MILLIMETERS MAXIMUM
MDCL MATERIAL DOCUMENT AND CLASSIFICATION AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
ABQZ INTERNAL DRIVE STYLE OFFSET CRUCIFORM (TORQUE SET)
CSYM SURFACE FINISH 0.8 MICROMETERS GRIP
SFTT SURFACE TREATMENT PASSIVATE OVERALL
CRSQ COUNTERSINK ANGLE 99.5 DEGREES MINIMUM AND 100.5 DEGREES MAXIMUM

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