The Valve,safety Relief, cataloged under National Stock Number 4820-01-148-5976, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-148-5976 |
| Primary Part Number | R10AD1D106-BM1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Furnished Items and Quantity | 2 NUT AND 2 TAILPIECE |
| Nominal Pipe Size Accommodated | 0.500 INCHES ALL ENDS IN |
| Connection Style | SOCKET WITH BRAZING RING ALL ENDS |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | ANGLE |
| Material Document and Classification | QQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-N-281 FED SPEC 1ST MATERIAL RESPONSE OR QQ-N-288 FED SPEC 2ND MATERIAL RESPONSE SEAT |
| Material Document and Classification | ASTM A276 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | QQ-N-281 FED SPEC 1ST MATERIAL RESPONSE OR QQ-N-288 FED SPEC 2ND MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Adjustable Pressure Range | +18.0 TO 22.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SPRING |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | BOLTED |
| Material | COPPER ALLOY BODY |
| Material | STEEL STEM |
| Material | NICKEL ALLOY OR PLASTIC ACETAL FLOW CONTROL DEVICE |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| 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 |
|---|---|
| R10AD1D106-BM1 PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| R10AD1D106-BM1 | 3/9 Design control — primary reference Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-01-148-5976 is a Valve,safety Relief, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-148-5976 has 1 manufacturer part number on file: R10AD1D106-BM1 (Hunt Valve Company, Inc.).
Key specifications for R10AD1D106-BM1: Flow Control Device: DISK; Furnished Items and Quantity: 2 NUT AND 2 TAILPIECE; Nominal Pipe Size Accommodated: 0.500 INCHES ALL ENDS IN; Connection Style: SOCKET WITH BRAZING RING ALL ENDS. 19 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.