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NSN 5305-00-524-0550, 5305005240550
SCREW,CLOSE TOLERANCE

Federal Supply Classification
FSC 5305 - Screws
National Item Identification Number
NIIN 005240550
Codification Country
United States
Item Name Code
INC 29294
Criticality
(X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code
(N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.
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DLMS® Summary

National Stock Number 5305-00-524-0550

National Stock Number (NSN) 5305-00-524-0550, or NIIN 005240550, (screw,close tolerance) was assigned June 25, 1969 in the Federal Logistics Information System (FLIS). NIIN 005240550 was cancelled on December 15, 2017, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs.

There are no manufacturer part numbers associated to this NSN.

This part number has not been procured by the US Government in over 5 years.

This NSN is unique to one weapons system.

This NSN is assigned to Item Name Code (INC) 29294. [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.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 5305005240550 does not contain precious metals.

This information was last updated on .


Technical Characteristics

SURFACE FINISH
(CSYM) 32.0 MICROINCHES THREADS
MATERIAL
(MATT) TITANIUM ALLOY UNS R54520 OVERALL
FASTENER LENGTH
(AASB) 3.301 INCHES MINIMUM AND 3.331 INCHES MAXIMUM
THREAD QUANTITY PER INCH
(CMLP) 28
THREAD DIRECTION
(AAJF) RIGHT-HAND
INTERNAL DRIVE STYLE
(ABQZ) OFFSET CRUCIFORM (TORQUE SET)
MINIMUM TENSILE STRENGTH
(CQBC) 160000 POUNDS PER SQUARE INCH
SURFACE FINISH
(CSYM) 32.0 MICROINCHES GRIP
HEAD DIAMETER
(AASL) 0.449 INCHES MINIMUM AND 0.507 INCHES MAXIMUM
THREAD SERIES DESIGNATOR
(THSD) UNJF
NOMINAL THREAD DIAMETER
(AHYM) 0.250 INCHES
SHANK UNTHREADED HOLE DIAMETER
(AAWB) 0.066 INCHES MINIMUM FIRST HOLE AND 0.086 INCHES MAXIMUM FIRST HOLE
THREAD LENGTH
(AASA) 0.291 INCHES MINIMUM AND 0.341 INCHES MAXIMUM
GRIP LENGTH
(ANEE) 2.990 INCHES MINIMUM AND 3.010 INCHES MAXIMUM
COUNTERSINK ANGLE
(CRSQ) 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER
(CRZS) 3.175 INCHES MINIMUM FIRST HOLE AND 3.225 INCHES MAXIMUM FIRST HOLE
HEAD STYLE
(AASK) FLAT COUNTERSUNK
MATERIAL DOCUMENT AND CLASSIFICATION
(MDCL) NAS 621,6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD CLASS
(AAJD) 3A
GRIP DIAMETER
(AAUR) 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM

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