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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 0.629 INCHES MINIMUM AND 0.634 INCHES MAXIMUM
ANEE GRIP LENGTH 0.188 INCHES NOMINAL
AAUR GRIP DIAMETER 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM
AASA THREAD LENGTH 0.531 INCHES MINIMUM
MDCL MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OVERALL OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OVERALL OR MIL-S-5400 MIL SPEC 2ND MATERIAL RESPONSE OVERALL OR MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-S-6758 MIL SPEC 6TH MATERIAL RESPONSE OVERALL
CQBC MINIMUM TENSILE STRENGTH 160000 POUNDS PER SQUARE INCH
AAJD THREAD CLASS 3A
AAJF THREAD DIRECTION RIGHT-HAND
AASB FASTENER LENGTH 0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM
CQFM HARDNESS RATING 36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL
AASK HEAD STYLE FLAT COUNTERSUNK
CRSQ COUNTERSINK ANGLE 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THSD THREAD SERIES DESIGNATOR UNF
ABQZ INTERNAL DRIVE STYLE HIGH-TORQUE
SFTT SURFACE TREATMENT CADMIUM OVERALL AND CHROMATE OVERALL
MATT MATERIAL STEEL COMP 6150 OVERALL OR STEEL COMP E4340 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP 8740 OVERALL OR STEEL COMP 8735 OVERALL OR STEEL COMP 4130 OVERALL
ZZZK SPECIFICATION/STANDARD DATA 80205-NAS585 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
AHYM NOMINAL THREAD DIAMETER 0.312 INCHES

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