The Valve,safety Relief, cataloged under National Stock Number 4820-01-375-3503, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 12 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-375-3503 |
| Primary Part Number | 0TBB-D01-MC0060 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| Status | ACTIVE |
| Flow Control Device | DISK |
| 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 | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Material | COPPER ALLOY BODY |
| Thread Series Designator | NPT SECOND END |
| Thread Series Designator | NPT FIRST END |
| 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 |
|---|---|
| A920136 ITEM 6 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 0TBB-D01-MC0060 PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| Reference | Meaning |
|---|---|
| A920136 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| A920136 | D/9 Drawing number reference only Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 0TBB-D01-MC0060 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| A920136 ITEM 6 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-01-375-3503 is a Valve,safety Relief, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-375-3503 has 2 manufacturer part numbers on file: A920136 ITEM 6 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 0TBB-D01-MC0060 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-375-3505. Verify interchangeability with system specifications before substitution.
Key specifications for 0TBB-D01-MC0060: Flow Control Device: DISK; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED INTERNAL PIPE SECOND END; Connection Type: THREADED EXTERNAL PIPE FIRST END. 12 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.