The Ring,oil Control, cataloged under National Stock Number 5330-01-551-8795, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Bird-Johnson Propeller Company, Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-551-8795 |
| Primary Part Number | MB221812 |
| Item Name | Ring,oil Control |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Bird-Johnson Propeller Company, Llc |
| Status | ACTIVE |
| Material | RUBBER NATURAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MB221812 PRIMARY | Bird-Johnson Propeller Company, Llc (USA) |
| OS/3/221812 | Bird-Johnson Propeller Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| OS/3/221812 | 5/9 Secondary reference Michell Bearings Limited |
| NB/0/221797 | 5/9 Secondary reference Michell Bearings Limited |
NSN 5330-01-551-8795 is a Ring,oil Control, manufactured by Bird-Johnson Propeller Company, Llc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-551-8795 has 2 manufacturer part numbers on file: MB221812 (Bird-Johnson Propeller Company, Llc), OS/3/221812 (Bird-Johnson Propeller Company, Llc).
Key specifications for MB221812: Part Name Assigned by Controlling Agency: (INAVY)RING,SPLASH,OIL; End Item Identification: BEARING,IMPELLER SHAFT AFT; Material: RUBBER NATURAL. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.