The Valve,safety Relief, cataloged under National Stock Number 4820-01-200-3384, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ldi Industries, Inc. Dba Ldi Industries Inc. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-200-3384 |
| Primary Part Number | CS9002-365220 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ldi Industries, Inc. Dba Ldi Industries Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Adjustable Pressure Range | +0.3 TO 1.0 POUNDS PER SQUARE INCH LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Thread Class | 2A ALL ENDS A |
| Material | BRONZE AND STEEL BODY |
| Thread Series Designator | UNF ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| CS9002-365220 PRIMARY | Ldi Industries, Inc. Dba Ldi Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| CS13720-1 | 5/9 Secondary reference Ldi Industries, Inc. Dba Ldi Industries Inc |
| 0491C0003 | 7/9 Vendor item drawing reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
| 0491C0003 | 7/1 Vendor item drawing reference Lockheed Martin Corporation Div Rms |
NSN 4820-01-200-3384 is a Valve,safety Relief, manufactured by Ldi Industries, Inc. Dba Ldi Industries Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-200-3384 has 1 manufacturer part number on file: CS9002-365220 (Ldi Industries, Inc. Dba Ldi Industries Inc).
Key specifications for CS9002-365220: Flow Control Device: DISK; Connection Style: PLAIN (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Style Designator: STRAIGHT THRU. 11 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.