The Valve,angle, cataloged under National Stock Number 4820-00-437-0078, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok. Government technical data includes 25 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-437-0078 |
| Primary Part Number | 1521M2B450-17 |
| Item Name | Valve,angle |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| Status | ACTIVE |
| Flow Control Device | DISKDISK |
| Connection Style | PLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDSTHREADED EXTERNAL PIPE ALL ENDS |
| Style Designator | ANGLE |
| Material Document and Classification | QQ-B-626,ALLOY360 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626,ALLOY360 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626,ALLOY377 FED SPEC 2ND MATERIAL RESPONSE FLOW CONTROL DEVICEQQ-B-626,ALLOY377 FED SPEC 2ND MATERIAL RESPONSE SEAT |
| Material Document and Classification | QQ-B-626,ALLOY360 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626,ALLOY360 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626,ALLOY377 FED SPEC 2ND MATERIAL RESPONSE SEATQQ-B-626,ALLOY377 FED SPEC 2ND MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-B-626,ALLOY360 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626,ALLOY360 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626,ALLOY377 FED SPEC 2ND MATERIAL RESPONSE STEMQQ-B-626,ALLOY377 FED SPEC 2ND MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | QQ-B-626,ALLOY360 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626,ALLOY377 FED SPEC 2ND MATERIAL RESPONSE STEM |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Features Provided | BONNET PACKINGBONNET PACKING |
| Bonnet Type | INSIDE SPRINGINSIDE SPRING |
| Thread Direction | RIGHT-HAND ALL ENDSRIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.125 INCHES ALL ENDS0.125 INCHES ALL ENDS IN |
| Maximum Operating Temp | 200.0 FAHRENHEIT SINGLE RESPONSE200.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Mounting Facility | BULKHEADBULKHEAD |
| Bonnet Attachment Method | INTEGRALINTEGRAL |
| Media for Which Designed | WATER, FRESH SECOND RESPONSE |
| Media for Which Designed | WATER, FRESH SECOND RESPONSESULFUR HEXAFLUORIDE, GASEOUS FIRST RESPONSE |
| Thread Quantity Per Inch | 27 ALL ENDS27 ALL ENDS |
| Material | COPPER ALLOY 360 OR COPPER ALLOY 360 OR COPPER ALLOY 377 OR COPPER ALLOY 377 SEATRUBBER FLOW CONTROL DEVICE |
| Material | COPPER ALLOY 360 OR COPPER ALLOY 360 OR COPPER ALLOY 377 OR COPPER ALLOY 377 STEMRUBBER FLOW CONTROL DEVICE |
| Material | COPPER ALLOY 360 OR COPPER ALLOY 360 OR COPPER ALLOY 377 SEATCOPPER ALLOY 377 BODY |
| Material | COPPER ALLOY 360 OR COPPER ALLOY 377 STEM |
| Thread Series Designator | NPT ALL ENDS |
| Valve Operation Method | MANUALMANUAL |
| 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 |
|---|---|
| 1521M2B450-17 PRIMARY | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| Reference | Meaning |
|---|---|
| 11290873-2 | 5/9 Secondary reference Ballistic Missile Defense Systems Command |
NSN 4820-00-437-0078 is a Valve,angle, manufactured by Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-437-0078 has 1 manufacturer part number on file: 1521M2B450-17 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok).
Key specifications for 1521M2B450-17: Flow Control Device: DISKDISK; Connection Style: PLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS; Connection Type: THREADED EXTERNAL PIPE ALL ENDSTHREADED EXTERNAL PIPE ALL ENDS; Style Designator: ANGLE. 25 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.