The Expander,seal Ring, cataloged under National Stock Number 2840-01-131-8621, is classified within Federal Supply Class 2840 (Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Kaydon Ring & Seal Inc Dba Skf Precision Technologies. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2840-01-131-8621 |
| Primary Part Number | A7138 |
| Item Name | Expander,seal Ring |
| FSC / FSG | 2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components |
| Manufacturer | Kaydon Ring & Seal Inc Dba Skf Precision Technologies |
| Status | ACTIVE |
| General Characteristics Item Description | CRES AMS5699;0.017 IN. MIN AND 0.019 IN. MAX THK; 0.155 IN. MIN AND 0.160 IN. MAX H; GAP OPENING 0.125 IN. MIN IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A7138 PRIMARY | Kaydon Ring & Seal Inc Dba Skf Precision Technologies (USA) |
| Reference | Meaning |
|---|---|
| 10158515 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| PR441979 | 3/2 Design control — primary reference U.S. Government activity |
| 2840PL2143361 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 3039T47P01 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 2840-01-131-8621 is a Expander,seal Ring, manufactured by Kaydon Ring & Seal Inc Dba Skf Precision Technologies, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.
NSN 2840-01-131-8621 has 1 manufacturer part number on file: A7138 (Kaydon Ring & Seal Inc Dba Skf Precision Technologies).
Key specifications for A7138: General Characteristics Item Description: CRES AMS5699;0.017 IN. MIN AND 0.019 IN. MAX THK; 0.155 IN. MIN AND 0.160 IN. MAX H; GAP OPENING 0.125 IN. MIN IN; End Item Identification: ENGINE MODEL F404. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 2840-01-131-8621 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.