NSN 2840-01-038-1211, 2840010381211
COUPLING,TURBINE SHAFT TO GEAR

Federal Supply Classification: FSC 2840 - Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components
National Item Identification Number: NIIN 010381211
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.

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DLMS^® Summary

National Stock Number 2840-01-038-1211

National Stock Number (NSN) 2840-01-038-1211, or NIIN 010381211, (coupling,turbine shaft to gear) was assigned March 29, 1977 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.

There is only one manufacturer part number associated with this NSN. One of those 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, only one supplier is deemed design controlled or valid supply parts. ISO Group has several sources of supply for this NSN.

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

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 19, 2002, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) This part is a commercial/non-developmental/off-the-shelf-item. Valid AMCs: 1, 2, 3, 4 and 5.

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 2840010381211 contains an unknown precious metal.

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 Apr 01, 2025.

Technical Characteristics

GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) STEEL,AMS6470,ROCKWELL 15N SCALE 92 MIN CASE HARDNESS,ROCKWELL C SCALE 33 MIN,37 MAX CORE HARDNESS,BLACK OXIDE SURFACE TREATMENT,AMS2485,3.140 IN. NOM O/A LG,1.100 IN. MIN,1.110 IN. MAX OD BODY,EXT SPLINES BOTH ENDS,38 TEETH,30 DEG PRESSURE ANGLE,1.1875 IN. NOM PITCH DIA,1.218 IN. MIN,1.223 IN. MAX OD SPLINES,0.380 IN. NOM LG SPLINES,2 EXT FLANGES ON OD,1.266 IN. MIN,1.268 IN. MAX OD BY 0.208 IN. MIN,0.213 IN. MAX W 1ST EXT FLANGE,0.797 IN. MIN,0.802 IN. MAX DISTANCE FROM 1ST END TO FLANGE,1 CIRCULAR GROOVE ON FLANGE OD,0.108 IN. MIN,0.113 IN. MAX W BY 0.047 IN. MIN,0.050 IN. MAX DP GROOVE,0.847 IN. MIN,0.852 IN. MAX DISTANCE FROM 1ST END TO GROOVE,1.241 IN. MIN,1.246 IN. MAX OD BY 0.208 IN. MIN,0.213 IN. MAX W 2ND EXT FLANGE,0.797 IN. MIN,0.802 IN. MAX DISTANCE FROM 2ND END TO FLANGE,1 CIRCULAR GROOVE ON EXT FLANGE,0.108 IN. MIN,0.113 IN. MAX W BY 0.051 IN. MIN,0.053 IN. MAX DP GROOVE,0.847 IN. MIN,0.852 IN. MAX DISTANCE FROM 2ND END TO GROOVE