The Valve,safety Relief, cataloged under National Stock Number 4820-01-658-5407, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is North American Safety Valve Industries, Inc. Dba Kunkle Valve. Government technical data includes 27 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-658-5407 |
| Primary Part Number | 266PEE01-KG0130 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | North American Safety Valve Industries, Inc. Dba Kunkle Valve |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 1.00 INCHES ALL ENDS IN |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Material Document and Classification | ASTM A479 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM A479 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTM A479 ASSN STD SINGLE MATERIAL RESPONSE DISK |
| Operating Pressure | 3157.00 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 1.00 INCHES IN |
| Adjustable Pressure Range | +4.0 TO 3300.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SPRING |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.00 INCHES ALL ENDS IN |
| Maximum Operating Temp | 750.00 FAHRENHEIT SINGLE RESPONSE DEGF |
| Second Connection Face to Centerline Distance | 1.750 INCHES IN |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | INTEGRAL |
| First Connection Face to Centerline Distance | 3.0625 INCHES IN |
| Material | STEEL COMP 316 BODY |
| Material | STEEL COMP 316 STEM |
| Material | STEEL COMP 316 DISK |
| Material | RUBBER ETHYLENE-PROPYLENE CLASS EPM SEAT |
| Thread Series Designator | NPT ALL ENDS |
| Opening Pressure Setting | 130.00 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| 266PEE01-KG0130 PRIMARY | North American Safety Valve Industries, Inc. Dba Kunkle Valve (USA) |
NSN 4820-01-658-5407 is a Valve,safety Relief, manufactured by North American Safety Valve Industries, Inc. Dba Kunkle Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-658-5407 has 1 manufacturer part number on file: 266PEE01-KG0130 (North American Safety Valve Industries, Inc. Dba Kunkle Valve).
Key specifications for 266PEE01-KG0130: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 1.00 INCHES ALL ENDS IN; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED INTERNAL PIPE SECOND END. 27 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.