The Connector,multiple,fluid Pressur, cataloged under National Stock Number 4730-00-541-8300, 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 19 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-541-8300 |
| Primary Part Number | NAS554-4 |
| 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 | 45.0 |
| 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 | 1/4 IN. OD TUBE 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 | 0.437 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED |
| Specification/standard Data | 81349-MIL-F-5509 GOVERNMENT SPECIFICATION |
| Thread Size | 7/16 IN.-20 LOCATION NOT OTHERWISE SPECIFIED IN |
| Screw Thread Series Designator | UNF LOCATION NOT OTHERWISE SPECIFIED |
| Surface Treatment | CADMIUM OR ZINC |
| Thread Class | 3A LOCATION NOT OTHERWISE SPECIFIED A |
| Material | STEEL |
| Furnished Items | SEAT LOCATION NOT OTHERWISE SPECIFIED |
| Thickness | 0.776 INCHES MINIMUM AND 0.786 INCHES MAXIMUM 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 |
|---|---|
| NAS554-4 | Hydro-Fitting Manufacturing Corporation (USA) |
| NAS554-4 | Acra Aerospace, Llc (USA) |
| NAS554-4 | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA) |
| NAS554-4 | Aerofit, Llc (USA) |
| NAS554-4 | Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA) |
| Reference | Meaning |
|---|---|
| NAS554-4 | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| NAS554-4 | 5/9 Secondary reference Collins Engineering Corp |
| NAS554-4 | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| NAS554-4 | 3/2 Design control — primary reference U.S. Government activity |
| MIL-F-5509 | 4/1 Identification reference U.S. Government activity |
| NAS554-4 | 5/9 Secondary reference Crown Fitting Co Inc |
NSN 4730-00-541-8300 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 4730-00-541-8300 has 5 manufacturer part numbers on file: NAS554-4 (Hydro-Fitting Manufacturing Corporation), NAS554-4 (Acra Aerospace, Llc), NAS554-4 (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution), NAS554-4 (Aerofit, Llc), NAS554-4 (Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply).
Key specifications for NAS554-4: Deg Between Outlets: 45.0; Bolt Hole Fluid Passage: PROVIDED; Seat Angle in Deg: 37.0 LOCATION NOT OTHERWISE SPECIFIED; Thread Provision: THREADED LOCATION NOT OTHERWISE SPECIFIED. 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.