The Bearing,ring Piston, cataloged under National Stock Number 1720-01-285-4656, is classified within Federal Supply Class 1720 (Aircraft Launching Equipment) of the Aircraft Launch, Landing, and Ground Handling Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1720-01-285-4656 |
| Item Name | Bearing,ring Piston |
| FSC / FSG | 1720 / 17 — Aircraft Launching Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | PLASTIC,25 PERCENT GLASS FILLED MOLDED POLYTETRAFLUOROETHYLENE; 17.220 IN. MIN,17.250 IN. MAX ID; 17.997 IN. NOM OD; 0.094 IN DEEP BY 0.125 IN WIDE 4 GROOVES EQ SPACED IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 414575-2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1720-01-285-4656 is a Bearing,ring Piston, classified under FSC 1720, Aircraft Launching Equipment. Status: active.
Key specifications for 1720-01-285-4656: General Characteristics Item Description: PLASTIC,25 PERCENT GLASS FILLED MOLDED POLYTETRAFLUOROETHYLENE; 17.220 IN. MIN,17.250 IN. MAX ID; 17.997 IN. NOM OD; 0.094 IN DEEP BY 0.125 IN WIDE 4 GROOVES EQ SPACED IN; End Item Identification: CATAPULT MODEL C-13,C13-1. 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.
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.