The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-129-7976, 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 General Electric Company. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-129-7976 |
| Primary Part Number | 9955M53P04 |
| Item Name | Restrictor Unit,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Strainer Type and Quantity | 2 SCREEN |
| Design Type | STRAIGHT |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 304 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 30304 ASSN STD SINGLE MATERIAL RESPONSE SCREENING |
| Material Document and Classification | QQ-S-763, CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Diameter | 0.187 INCHES NOMINAL IN |
| Material | STEEL COMP 303 BODY |
| Material | STEEL COMP 304 SCREENING |
| Orifice Diameter | 0.019 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 |
|---|---|
| 9955M53P04 | General Electric Company (USA) |
| ST7M426-1 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10108676 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST7M426 | D/9 Drawing number reference only The Boeing Company Div Defense |
| JETA1872170D | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-129-7976 is a Restrictor Unit,fluid Flow, manufactured by General Electric Company, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-129-7976 has 2 manufacturer part numbers on file: 9955M53P04 (General Electric Company), ST7M426-1 (The Boeing Company Div Defense).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-388-1015. Verify interchangeability with system specifications before substitution.
Key specifications for 9955M53P04: Strainer Type and Quantity: 2 SCREEN; Design Type: STRAIGHT; Material Document and Classification: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 304 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 30304 ASSN STD SINGLE MATERIAL RESPONSE SCREENING; Material Document and Classification: QQ-S-763, CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED. 8 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.