The Valve,safety Relief, cataloged under National Stock Number 4820-00-446-3515, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 16 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 34 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-446-3515 |
| Primary Part Number | AN1S45-63ALT4PC162 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN,OPTIONAL END(PIPE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Operating Pressure | 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +26.0 TO 75.0 POUNDS PER SQUARE INCH LBS |
| Features Provided | PRESSURE TIGHT OUTLET SIDE |
| Bonnet Type | INSIDE SPRING |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Maximum Operating Temp | 450.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | THREADED |
| Media for Which Designed | STEAM SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Material | COPPER ALLOY STEM |
| Material | COPPER ALLOY SEAT |
| Thread Series Designator | NPT 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 |
|---|---|
| AN1S45-63ALT4PC162 PRIMARY | Naval Sea Systems Command (USA) |
| CA68S47-063PC162 PRIMARY | Naval Sea Systems Command (USA) |
| CV9S5501-42ALTPC162 PRIMARY | Naval Sea Systems Command (USA) |
| AN1S55-153PC173 PRIMARY | Naval Sea Systems Command (USA) |
| AN1S55-154PC173 PRIMARY | Naval Sea Systems Command (USA) |
| DD445S4601-187PC162 PRIMARY | Naval Sea Systems Command (USA) |
| DD445S5501-205PC162 PRIMARY | Naval Sea Systems Command (USA) |
| DD445S5501-199ALT2PC162 PRIMARY | Naval Sea Systems Command (USA) |
| AN1S55-150PC162 PRIMARY | Naval Sea Systems Command (USA) |
| DD445S4601-248PC162 PRIMARY | Naval Sea Systems Command (USA) |
| CV9S5501-41PC162 PRIMARY | Naval Sea Systems Command (USA) |
| DD445S4601-193PC162 PRIMARY | Naval Sea Systems Command (USA) |
| CV9S5501-036PC162 PRIMARY | Naval Sea Systems Command (USA) |
| DD445S4601-242PC162 PRIMARY | Naval Sea Systems Command (USA) |
| AN1S45-69ALT2PC162 PRIMARY | Naval Sea Systems Command (USA) |
| AN1S55-144PC162 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| DD445S5501-200PC162 | 5/9 Secondary reference U.S. Government activity |
| AN1S55-154PC173 | 5/9 Secondary reference U.S. Government activity |
| CV9S5501-48PC162 | 5/9 Secondary reference U.S. Government activity |
| CA68S47-069PC162 | 5/9 Secondary reference U.S. Government activity |
| C10616-1PC162 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
| C3522-1PC162 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
| AN1S45-69ALT2PC162 | 5/9 Secondary reference U.S. Government activity |
| C3360-1PC162 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
| C3522-8PC162 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
| C4101-8PC162 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
| C3291-8PC162 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
| AN1S55-153PC173 | 5/9 Secondary reference U.S. Government activity |
| CV9S5501-41PC162 | 5/9 Secondary reference U.S. Government activity |
| 3460-162 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
| C3520-8PC162 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
| DD445S5501-205PC162 | 5/9 Secondary reference U.S. Government activity |
| C3291-1PC162 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
| C4100-2PC173 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
| C3443-1PC162 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
| C4100-1PC173 | 5/9 Secondary reference Ex-Cell-O Corp Machine Tool Products Div |
NSN 4820-00-446-3515 is a Valve,safety Relief, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-446-3515 has 16 manufacturer part numbers on file: AN1S45-63ALT4PC162 (Naval Sea Systems Command), CA68S47-063PC162 (Naval Sea Systems Command), CV9S5501-42ALTPC162 (Naval Sea Systems Command), AN1S55-153PC173 (Naval Sea Systems Command), AN1S55-154PC173 (Naval Sea Systems Command) and 11 more.
Key specifications for AN1S45-63ALT4PC162: Flow Control Device: DISK; Connection Style: PLAIN,OPTIONAL END(PIPE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED INTERNAL PIPE SECOND END. 22 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.