The Ring,piston Seal, cataloged under National Stock Number 1620-01-083-8865, is classified within Federal Supply Class 1620 (Aircraft Landing Gear Components) of the Aircraft Components and Accessories group. The manufacturer of record is Greene Tweed & Co Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1620-01-083-8865 |
| Primary Part Number | 744F8MTE-160-4780 |
| Item Name | Ring,piston Seal |
| FSC / FSG | 1620 / 16 — Aircraft Landing Gear Components |
| Manufacturer | Greene Tweed & Co Inc |
| Status | ACTIVE |
| General Characteristics Item Description | STANDARD BORE DIAMETER IS 9.700 IN;CROSS SECTIONAL SHAPE IS PLAIN RECTANGULAR, STRAIGHT FACE; RING STYLE IS CONCENTRIC IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 744F8MTE-160-4780 PRIMARY | Greene Tweed & Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 744F8MTE-160-4780 | 5/9 Secondary reference Palmetto Inc |
NSN 1620-01-083-8865 is a Ring,piston Seal, manufactured by Greene Tweed & Co Inc, classified under FSC 1620, Aircraft Landing Gear Components. Status: active.
NSN 1620-01-083-8865 has 1 manufacturer part number on file: 744F8MTE-160-4780 (Greene Tweed & Co Inc).
Key specifications for 744F8MTE-160-4780: General Characteristics Item Description: STANDARD BORE DIAMETER IS 9.700 IN;CROSS SECTIONAL SHAPE IS PLAIN RECTANGULAR, STRAIGHT FACE; RING STYLE IS CONCENTRIC IN; Overall Width: 0.5790 INCHES MINIMUM AND 0.5890 INCHES MAXIMUM IN. 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 1620-01-083-8865 has DEMIL Code Q. 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.