The Retainer Assembly,lower Cylinder, cataloged under National Stock Number 1620-01-253-7690, is classified within Federal Supply Class 1620 (Aircraft Landing Gear Components) of the Aircraft Components and Accessories group. The manufacturer of record is Goodrich Corporation. Government technical data includes 3 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1620-01-253-7690 |
| Primary Part Number | 1881B464-10 |
| Item Name | Retainer Assembly,lower Cylinder |
| FSC / FSG | 1620 / 16 — Aircraft Landing Gear Components |
| Manufacturer | Goodrich Corporation |
| Status | ACTIVE |
| FSC Application Data | MAIN LANDING GEAR |
| General Characteristics Item Description | 4340 STEEL PER MIL-S-8844;CADMIUMPLATE PER QQ-P-416;3.938 OD;3.250 ID |
| Functional Description | NHA LOWER CYLINDER AIRCRAFT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1881B464-10 PRIMARY | Goodrich Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1881B464-10 | 3/9 Design control — primary reference Goodrich Corporation Div Advanced Structures Landing Systems |
NSN 1620-01-253-7690 is a Retainer Assembly,lower Cylinder, manufactured by Goodrich Corporation, classified under FSC 1620, Aircraft Landing Gear Components. Status: active.
NSN 1620-01-253-7690 has 1 manufacturer part number on file: 1881B464-10 (Goodrich Corporation).
Key specifications for 1881B464-10: FSC Application Data: MAIN LANDING GEAR; General Characteristics Item Description: 4340 STEEL PER MIL-S-8844;CADMIUMPLATE PER QQ-P-416;3.938 OD;3.250 ID; Functional Description: NHA LOWER CYLINDER AIRCRAFT; End Item Identification: AIRCRAFT B1B. 3 specifications are 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 1620-01-253-7690 has DEMIL Code D. 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.