The Connector,multiple,fluid Pressur, cataloged under National Stock Number 4730-00-541-8619, 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 Hydro-Fitting Manufacturing Corporation. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-541-8619 |
| Primary Part Number | NAS553-6D |
| Item Name | Connector,multiple,fluid Pressur |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hydro-Fitting Manufacturing Corporation |
| Status | ACTIVE |
| Deg Between Outlets | 75.0 |
| Bolt Hole Fluid Passage | PROVIDED |
| Seat Angle in Deg | 37.0 LOCATION NOT OTHERWISE SPECIFIED |
| Thread Provision | THREADED LOCATION NOT OTHERWISE SPECIFIED |
| Fluid Conveyance Type and Size for Which Designed | 3/8 IN.OD IN |
| Connection Style | FLARED LOCATION NOT OTHERWISE SPECIFIED |
| Bolt Hole Flats Serrations | NOT PROVIDED |
| Style Designator | 1 FLUID CONNECTION |
| Fluid Connection Quantity | 1 LOCATION NOT OTHERWISE SPECIFIED |
| Bolt Hole Diameter | 0.563 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED |
| Thread Size | 9/16 IN.-28 LOCATION NOT OTHERWISE SPECIFIED IN |
| Screw Thread Series Designator | UNF LOCATION NOT OTHERWISE SPECIFIED |
| Surface Treatment | ANODIZE |
| Thread Class | 3A LOCATION NOT OTHERWISE SPECIFIED A |
| Material | ALUMINUM ALLOY |
| Furnished Items | SEAT LOCATION NOT OTHERWISE SPECIFIED |
| Thickness | 0.969 INCHES NOMINAL 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 |
|---|---|
| NAS553-6D | Hydro-Fitting Manufacturing Corporation (USA) |
| NAS553-6D | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA) |
| NAS553-6D | Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA) |
| NAS553-6D | Aerofit, Llc (USA) |
| Reference | Meaning |
|---|---|
| NAS553-6D | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| NAS553-6D | 5/9 Secondary reference Crown Fitting Co Inc |
| AS4841 | 5/9 Secondary reference U.S. Government activity |
| AS4841 | 3/1 Design control — primary reference Sae International Dba Sae International |
| NAS553-6D | 5/9 Secondary reference Collins Engineering Corp |
| NAS553-6D | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| NAS553-6D | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-541-8619 is a Connector,multiple,fluid Pressur, manufactured by Hydro-Fitting Manufacturing Corporation, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-541-8619 has 4 manufacturer part numbers on file: NAS553-6D (Hydro-Fitting Manufacturing Corporation), NAS553-6D (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution), NAS553-6D (Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply), NAS553-6D (Aerofit, Llc).
Key specifications for NAS553-6D: Deg Between Outlets: 75.0; Bolt Hole Fluid Passage: PROVIDED; Seat Angle in Deg: 37.0 LOCATION NOT OTHERWISE SPECIFIED; Thread Provision: THREADED LOCATION NOT OTHERWISE SPECIFIED. 18 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.