NSN 2840-00-939-3472, 2840009393472
Cancelled -> Replaced by 2840009803089

Federal Supply Classification: FSC 2840 - Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components
National Item Identification Number: NIIN 009393472
Codification Country: United States
Item Name Code: INC 77777
Criticality: (F) This item is a Flight Safety Critical Aircraft Part (FSCAP).
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

Manufacture or supply this part?
Join our growing community of certified suppliers.

Let Us Know

CALL ABOUT NSN 2840-00-939-3472

Our client representatives are standing by to help fulfill your request.

+1-321-773-5710

REQUEST QUOTE for 2840-00-939-3472

Have a list that needs to be quoted? Upload it here.

Upload a List

DLMS^® Summary

National Stock Number 2840-00-939-3472

National Stock Number (NSN) 2840-00-939-3472, or NIIN 009393472, (seal bearing rear) was assigned November 3, 1965 in the Federal Logistics Information System (FLIS). This NSN replaces 1 stock number, 2840009803089.

There are 2 manufacturer part numbers associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers are 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 assigned to Item Name Code (INC) 77777. This item is a Flight Safety Critical Aircraft Part (FSCAP). There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 2840009393472 does not contain precious metals.

This NSN is associated to Schedule B 8411997050: parts of gas turbine aircraft engines, other than for use in civil aircraft. The Schedule B End Use is listed as engines and turbines for military aircraft. NAICS classification category 336412: aircraft engine and engine parts manufacturing.

This information was last updated on Aug 01, 2025.

Technical Characteristics

END ITEM IDENTIFICATION: (AGAV) TF30 ENG
GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) GRAPHITE CARBON;RING SHAPED WITH VERTICAL JOINT 0.008 MIN,0.014 MAX IN. W AT 3.783 NOM IN. OD FOR SEAL;0.129 MIN,0.131 MAX IN. W WALL;0.168 MIN,0.176 MAX IN. WALL THK;7 HOLES THRU WALL WIDTH EQ SPACED ON BASIS OF 8,0.026 MIN,0.030 MAX DIA,RECESS 0.030 MIN,0.035 MAX IN. DIA TO 0.036 MIN,0.040 MAX IN. DEPTH 1ST SIDE,RECESS 0.060 MIN,0.065 MAX IN. DIA TO 0.020 MIN,0.024 MAX IN. DEPTH 2ND SIDE;16 GROOVES EQ SPACED ON FIRST SIDE,0.040 MAX IN. DEEP INTO WALL WIDTH,0.116 MAX IN. DEEP INTO WALL THK,ROUNDED WITH 0.100 MAX IN. RADIUS