The Bearing Retainer, cataloged under National Stock Number 4820-01-062-8021, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-062-8021 |
| Primary Part Number | 810-4385058 PIECE 56 |
| Item Name | Bearing Retainer |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL PHOSPHOR BRONZE PER FED SPEC QQ-B-750 COMP A HARD; FLANGE DIA 1.625 IN.; BODY DIA 0.874 IN. MIN,0.875 IN. MAX; LENGTH OVERALL 0.625 IN.; FLANGE THICKNESS 0.257 IN.; BODY THICKNESS 0.365 IN. MIN/0.370 IN.; FLANGE ID 0.531 IN.; BODY ID 0.6880 IN. MIN/0.6885 IN. MAX; 4 0.188 IN. HOLES EQUALLY SPACED ON 1.250 IN. BOLT CIRCLE ON FLANGE FACE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 810-4385058 PIECE 56 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 810-4385058 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-062-8021 is a Bearing Retainer, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-062-8021 has 1 manufacturer part number on file: 810-4385058 PIECE 56 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-063-0421, 4820-01-087-0002. Verify interchangeability with system specifications before substitution.
Key specifications for 810-4385058 PIECE 56: General Characteristics Item Description: MATERIAL PHOSPHOR BRONZE PER FED SPEC QQ-B-750 COMP A HARD; FLANGE DIA 1.625 IN.; BODY DIA 0.874 IN. MIN,0.875 IN. MAX; LENGTH OVERALL 0.625 IN.; FLANGE THICKNESS 0.257 IN.; BODY THICKNESS 0.365 IN. MIN/0.370 IN.; FLANGE ID 0.531 IN.; BODY ID 0.6880 IN. MIN/0.6885 IN. MAX; 4 0.188 IN. HOLES EQUALLY SPACED ON 1.250 IN. BOLT CIRCLE ON FLANGE FACE 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.
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.