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NSN 5310-00-055-2350, 5310000552350
NUT,SELF-LOCKING,DOUBLE HEXAGON

Federal Supply Classification
FSC 5310 - Nuts and Washers
National Item Identification Number
NIIN 000552350
Codification Country
United States
Item Name Code
INC 05276
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 5310-00-055-2350

National Stock Number (NSN) 5310-00-055-2350, or NIIN 000552350, (nut,self-locking,double hexagon) was assigned June 1, 1967 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are 5 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 8 suppliers. Today, 7 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 3 suppliers are deemed design controlled or valid supply parts. ISO Group has several sources of supply for this NSN.

This part number is actively being procured by the US Government, with procurement history within the last 90 days. There have been 115 contracts issued for this part number, with 91 awards given. There is moderate competition for this NSN. The US Government has awarded contracts to 6 different suppliers. The last contract numbers awarded were: SPE4A624FBAP8, SPE4A624FBZ4G, SPE4A624FBT5X, SPE4A624FBT1L, SPE4A624FAVKH. The total value of the awarded contracts has been US$ 514,766.89.

This NSN is fairly common among different weapons systems, belonging to 21 different platforms.

There has been a small amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jul 16, 2011, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) This part requires engineering source approval by the design control activity in order to maintain the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity. Valid AMCs: 1, 2, 3, 4 and 5.

This NSN is assigned to Item Name Code (INC) 05276. [A NUT HAVING 12 DRIVE POINTS AND 24 SIDES. THE BEARING SURFACE MAY BE WASHER FACED. AN INTEGRAL LOCKING FEATURE IS INCORPORATED IN THE DESIGN OF THE HEAD OR IN THE 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 5310000552350 contains an unknown precious metal.

This NSN is associated to Schedule B 7318160000: nuts of iron or steel. The Schedule B End Use is listed as finished metal shapes. NAICS classification category 332722: bolt, nut, screw, rivet, and washer manufacturing.

This information was last updated on .


Technical Characteristics

BEARING SURFACE TYPE
(CRTM) CHAMFERED
HARDNESS RATING
(CQFM) 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
NOMINAL THREAD SIZE
(CQJX) 0.375 INCHES
NUT HEIGHT
(ADEA) 0.303 INCHES MINIMUM AND 0.313 INCHES MAXIMUM
NUT STYLE
(ACTA) DOUBLE HEXAGON
LOCKING FEATURE
(AAUM) PREVAILING TORQUE ALL METAL DESIGN
MATERIAL DOCUMENT AND CLASSIFICATION
(MDCL) AMS 6280 ASSN STD 1ST MATERIAL RESPONSE OVERALL OR AMS 6300 ASSN STD 2ND MATERIAL RESPONSE OVERALL OR AMS 6304 ASSN STD 3RD MATERIAL RESPONSE OVERALL
MATERIAL
(MATT) STEEL COMP 8630 OVERALL OR STEEL COMP 4037 OVERALL OR STEEL COMP 601 OVERALL
THREAD CLASS
(AAJD) 3B
THREAD DIRECTION
(AAJF) RIGHT-HAND
THREAD SERIES
(BZRR) UNF
THREAD QUANTITY PER INCH
(CMLP) 24
WIDTH ACROSS FLATS
(ASDB) 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION
(STDC) QQ-P-416,TY 1,CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT
(SFTT) CADMIUM OVERALL
TEMP RATING
(AZKQ) 500.0 DEG FAHRENHEIT NOMINAL

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