NSN 5305-01-293-9550, 5305012939550
SCREW ASSEMBLY,PANEL

Federal Supply Classification: FSC 5305 - Screws
National Item Identification Number: NIIN 012939550
Codification Country: United States
Item Name Code: INC 33044
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.

Availability: Readily Available Qualified Suppliers: Currently qualifying suppliers

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DLMS^® Summary

National Stock Number 5305-01-293-9550

National Stock Number (NSN) 5305-01-293-9550, or NIIN 012939550, (screw assembly,panel) was assigned February 9, 1989 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are 3 manufacturer part numbers associated with this NSN. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 3 suppliers. Today, 3 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts.

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

This NSN is somewhat common among different platforms, belonging to 6 different weapons systems.

There has been very little 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 Aug 02, 2005, 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) 33044. [A HEADED, THREADED FASTENING DEVICE OVER WHICH MAY BE ASSEMBLED; (1) A STAND-OFF; (2) A FLANGED BUSHING WITH WASHER(S) AND/OR A SHOULDERED BUSHING WITHOUT A FLANGE, OR IT MAY HAVE AN INTERNALLY THREADED SLEEVE THAT IS AN INTEGRAL PART OF THE SCREW; A WASHER AND AN EXTERNALLY THREAD SELF-LOCKING BUSHING THAT IS DRIVEN BY AN INSERTED DRIVER. ATTACHED TO PANEL BY THREADED BUSHING OR BY FLARING END OF STAND-OFF, OR BUSHING. USED IN CONJUNCTION WITH A SPEED NUT, NUT PLATE, OR DRIVEN INTO A THREADED HOLE IN THE ITEM THAT THE PANEL IS FASTENED TO. MAY BE SPRING LOADED.]. 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 5305012939550 does not contain precious metals.

This NSN is associated to Schedule B 7318152000: bolts and bolts and their nuts or washers exported in the same shipment. The Schedule B End Use is listed as iron and steel products, other. NAICS classification category 332722: bolt, nut, screw, rivet, and washer manufacturing.

This information was last updated on Aug 01, 2025.

Technical Characteristics

MATERIAL: (MATT) COPPER ALLOY 510 PRIMARY WASHER OR COPPER ALLOY 524 PRIMARY WASHER OR COPPER ALLOY 544 PRIMARY WASHER
FASTENER LENGTH: (AASB) 0.470 INCHES MINIMUM AND 0.500 INCHES MAXIMUM
HEAD DIAMETER: (AASL) 0.205 INCHES MINIMUM AND 0.219 INCHES MAXIMUM
HEAD STYLE: (AASK) PAN
INTERNAL DRIVE STYLE: (ABQZ) SLOT
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE SECONDARY WASHER
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE STAND-OFF
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) QQ-B-750 FED SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER
MATERIAL: (MATT) COPPER ALLOY 260 STAND-OFF
MATERIAL: (MATT) COPPER ALLOY 510 OR COPPER ALLOY 524 OR COPPER ALLOY 544 PRIMARY WASHER
MATERIAL: (MATT) STEEL COMP 303 FASTENER
MATERIAL: (MATT) STEEL COMP 303 SECONDARY WASHER
NOMINAL THREAD DIAMETER: (AHYM) 0.112 INCHES
SPECIAL FEATURES: (FEAT) FLAT WASHER 0.215 OD X 0.120 ID X 0.009 IN. MIM,0.012 IN MAX THK; BUSHING 0.137 IN MIN,0.143 IN MAX.DIA; IN 0.172 IN.DIA HOLE; SPLIT LOCKWASHER 0.212 OD X 0.115 ID X 0.017 IN MIN,0.033 IN MAX THK;
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: (STDC) QQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: (STDC) QQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE STAND-OFF
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: (STDC) QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: (STDC) QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SECONDARY WASHER
SURFACE TREATMENT: (SFTT) NICKEL PRIMARY WASHER
SURFACE TREATMENT: (SFTT) NICKEL STAND-OFF
SURFACE TREATMENT: (SFTT) PASSIVATE FASTENER
SURFACE TREATMENT: (SFTT) PASSIVATE SECONDARY WASHER
THREAD CLASS: (AAJD) 2A
THREAD LENGTH: (AASA) 0.420 INCHES MINIMUM AND 0.500 INCHES MAXIMUM
THREAD DIRECTION: (AAJF) RIGHT-HAND
THREAD QUANTITY PER INCH: (CMLP) 40
THREAD SERIES DESIGNATOR: (THSD) UNC
SPECIAL FEATURES: (FEAT) DFLAT WASHER 0.215 OD X 0.120 ID X 0.009 IN. MIM,0.012 IN MAX THK; BUSHING 0.137 IN MIN,0.143 IN MAX.DIA; IN 0.172 IN.DIA HOLE; SPLIT LOCKWASHER 0.212 OD X 0.115 ID X 0.017 IN MIN,0.033 IN MAX THK;