The Valve,check, cataloged under National Stock Number 4820-00-802-1123, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Circor Aerospace, Inc. Dba Circor Aerospace Inc. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-802-1123 |
| Primary Part Number | 259T8TT |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Circor Aerospace, Inc. Dba Circor Aerospace Inc |
| Status | CANCELLED |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Thread Quantity Per Inch | 16 ALL ENDS |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) ALL ENDS |
| Media for Which Designed | NITROGEN, GASEOUS SINGLE RESPONSE |
| Thread Class | 3A ALL ENDS A |
| Valve Operation Method | AUTOMATIC |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Disk Loading Method | SPRING |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Material | STEEL COMP 303 BODY |
| Maximum Operating Temp | 280.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Flow Control Device | POPPET |
| Style Designator | STRAIGHT THRU |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Material Document and Classification | AISI 8637 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| LTCT9315-01 | Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA) |
| 1308D-1 | Kepner Products Co Div Kepner Products Company (USA) |
| 259T8TT PRIMARY | Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA) |
NSN 4820-00-802-1123 is a Valve,check, manufactured by Circor Aerospace, Inc. Dba Circor Aerospace Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-802-1123 has 3 cross-referenced part numbers: LTCT9315-01 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix), 1308D-1 (Kepner Products Co Div Kepner Products Company), 259T8TT (Circor Aerospace, Inc. Dba Circor Aerospace Inc).
There is 1 known substitute for 4820-00-802-1123: 5940-00-159-0237. Verify interchangeability with system specifications before substitution.
Key specifications for 259T8TT: Nominal Thread Size: 0.750 INCHES ALL ENDS IN; Connection Style: FLARED (TUBE) ALL ENDS; Thread Quantity Per Inch: 16 ALL ENDS; Thread Series Designator: UNIFIED NATIONAL JOINT (UNJ) ALL ENDS. 18 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-802-1123 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.