The Reducer,tube, cataloged under National Stock Number 4730-00-580-7696, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Grimes Aerospace Company. Government technical data includes 19 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-580-7696 |
| Primary Part Number | 51-0051-2 |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| Connection Style | COMPRESSION (TUBE) FIRST END |
| Connection Style | FLARED (TUBE) SECOND END |
| Seat Nominal Radius | 0.040 INCHES FIRST END IN |
| Nominal Overall Length | 1.418 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Nominal Outside Diameter Tube Accommodated | 0.625 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Nominal Thread Size | 0.875 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES SECOND END |
| Surface Treatment | ANODIZE INSIDE |
| Surface Treatment | ANODIZE OUTSIDE |
| Thread Class | 3A FIRST END A |
| Thread Class | 3A SECOND END A |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UNF FIRST END |
| Thread Series Designator | UNF SECOND END |
| Reducer Type | CONCENTRIC |
| 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 |
|---|---|
| 51-0051-2 PRIMARY | Grimes Aerospace Company (USA) |
NSN 4730-00-580-7696 is a Reducer,tube, manufactured by Grimes Aerospace Company, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-580-7696 has 1 manufacturer part number on file: 51-0051-2 (Grimes Aerospace Company).
1 possible match (shared part number, not a government interchangeability claim): 5930-01-421-1310. Verify interchangeability with system specifications before substitution.
Key specifications for 51-0051-2: Connection Style: COMPRESSION (TUBE) FIRST END; Connection Style: FLARED (TUBE) SECOND END; Seat Nominal Radius: 0.040 INCHES FIRST END IN; Nominal Overall Length: 1.418 INCHES IN. 19 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.
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.