The Strainer,sediment, cataloged under National Stock Number 4730-01-557-7003, 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 Naval Sea Systems Command. Government technical data includes 7 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-557-7003 |
| Primary Part Number | 503-5001057-S2-090 |
| Item Name | Strainer,sediment |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Filtering Media Design | PERFORATED SINGLE FILTERING MEDIA RESPONSE |
| First Intake Connection Type | SOCKET WELDING SIDE |
| Style Designator | DIVERTED FLOW BASKET STRAINER W/THREADED COVER |
| Body Length | 5.125 INCHES NOMINAL IN |
| First Intake Nominal Inside Diameter | 1.070 INCHES IN |
| Material | STEEL CORROSION RESISTING BODY |
| Second Intake Connection Relationship to First Intake Connection | IDENTICAL |
| 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 |
|---|---|
| 1057-3/4-090 | Sfc Valve Corporation (USA) |
| 503-5001057-S2-090 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-5001057 | D/9 Drawing number reference only Naval Sea Systems Command |
| 803-5001057-S2AF-090 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 4730-01-557-7003 is a Strainer,sediment, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-557-7003 has 2 manufacturer part numbers on file: 1057-3/4-090 (Sfc Valve Corporation), 503-5001057-S2-090 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-572-0221. Verify interchangeability with system specifications before substitution.
Key specifications for 503-5001057-S2-090: Filtering Media Design: PERFORATED SINGLE FILTERING MEDIA RESPONSE; First Intake Connection Type: SOCKET WELDING SIDE; Style Designator: DIVERTED FLOW BASKET STRAINER W/THREADED COVER; Body Length: 5.125 INCHES NOMINAL IN. 7 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.