The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-290-7877, 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 Northrop Grumman Systems Corporation. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-290-7877 |
| Primary Part Number | GR524M1 |
| Item Name | Restrictor Unit,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Strainer Type and Quantity | 1 SCREEN |
| Design Type | STRAIGHT |
| Thread Series | UNIFIED NATIONAL JOINT (UNJ) SECOND CONNECTION |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST CONNECTION |
| End Connection Type | THREADED MALE TUBE FIRST CONNECTION |
| End Connection Type | THREADED MALE TUBE SECOND CONNECTION |
| Material Document and Classification | QQ-S-763, CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Thread Direction | RIGHT-HAND SECOND CONNECTION |
| Thread Direction | RIGHT-HAND FIRST CONNECTION |
| Thread Size Designator | 7/16-20 FIRST CONNECTION |
| Thread Size Designator | 1-1/16-12 SECOND CONNECTION |
| Operating Temp Range | -54.0 TO 177.0 CELSIUS DEGC |
| Thread Class | 3A SECOND CONNECTION A |
| Thread Class | 3A FIRST CONNECTION A |
| Material | STEEL COMP 303 BODY |
| Material | STEEL SCREENING |
| End Connection Similarity | NOT 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 |
|---|---|
| GR524M1 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| VDLX0502450A | 3/2 Design control — primary reference U.S. Government activity |
| GRS24M | 7/1 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 4730-01-290-7877 is a Restrictor Unit,fluid Flow, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-290-7877 has 1 manufacturer part number on file: GR524M1 (Northrop Grumman Systems Corporation).
Key specifications for GR524M1: Strainer Type and Quantity: 1 SCREEN; Design Type: STRAIGHT; Thread Series: UNIFIED NATIONAL JOINT (UNJ) SECOND CONNECTION; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF) FIRST CONNECTION. 17 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.