Recently Updated NSN 5305-01-197-2550 Or (5305011972550) Part List

Item Name	Screw Close Tolerance
Federal Supply Group (FSG)	Hardware and Abrasives
Federal Supply Class (FSC)	5305 Screws
National Item Identification Number (NIIN)	01-197-2550 (011972550)
NCB Code	USA (01)
Manufacturer	National Aerospace Standards Com

Part Number	Manufacturer	Item Name	RFQ
NAS1581F3R6	national aerospace standards com	screw close tolerance	RFQ
NAS1581A3R6	national aerospace standards com	screw close tolerance	RFQ

MRC	Criteria	Characteristic
AAJD	THREAD CLASS	3A
AAJF	THREAD DIRECTION	RIGHT-HAND
AASA	THREAD LENGTH	0.338 INCHES MINIMUM AND 0.388 INCHES MAXIMUM
AASB	FASTENER LENGTH	0.723 INCHES MINIMUM AND 0.753 INCHES MAXIMUM
AASK	HEAD STYLE	FLAT COUNTERSUNK
AASL	HEAD DIAMETER	0.2578 INCHES MINIMUM AND 0.3047 INCHES MAXIMUM
AAUR	GRIP DIAMETER	0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM
ABQZ	INTERNAL DRIVE STYLE	OFFSET CRUCIFORM (TORQUE SET)
AHYM	NOMINAL THREAD DIAMETER	0.190 INCHES
ANEE	GRIP LENGTH	0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM
CMLP	THREAD QUANTITY PER INCH	32
CQBC	MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
CQFM	HARDNESS RATING	36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL
CRSQ	COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
CSYM	SURFACE FINISH	32.0 MICROINCHES GRIP
CSYM	SURFACE FINISH	32.0 MICROINCHES THREADS
FEAT	SPECIAL FEATURES	INTERNAL DRIVE RIBBED
MATT	MATERIAL	STEEL COMP 4140 OVERALL OR STEEL COMP E4340 OVERALL OR STEEL COMP 8740 OVERALL
MDCL	MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OVERALL
SFTT	SURFACE TREATMENT	CADMIUM OVERALL AND CHROMATE OVERALL
STDC	SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THSD	THREAD SERIES DESIGNATOR	UNJF
ZZZK	SPECIFICATION/STANDARD DATA	80205-NAS1581 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD