The Valve,safety Relief, cataloged under National Stock Number 4820-00-239-2991, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Tactair Fluid Controls Inc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-239-2991 |
| Primary Part Number | 3251 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Tactair Fluid Controls Inc |
| Status | ACTIVE |
| Material | STEEL FLOW CONTROL DEVICE |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Thread Series Designator | UNF FIRST END |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Thread Class | 3A FIRST END A |
| Material | STEEL CORROSION RESISTING BODY |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 3251 | Kaiser Fluid Technologies Inc. (USA) |
| 332-2723-010 | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| 332-2723-010 | Rockwell Collins, Inc. Div Collins Aerospace - Mission Systems (USA) |
| 3251 | Hawker Pacific Aerospace Landing Gear and Components Mfg and Repair (USA) |
| 3251 PRIMARY | Tactair Fluid Controls Inc (USA) |
NSN 4820-00-239-2991 is a Valve,safety Relief, manufactured by Tactair Fluid Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-239-2991 has 5 cross-referenced part numbers: 3251 (Kaiser Fluid Technologies Inc.), 332-2723-010 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems), 332-2723-010 (Rockwell Collins, Inc. Div Collins Aerospace - Mission Systems), 3251 (Hawker Pacific Aerospace Landing Gear and Components Mfg and Repair), 3251 (Tactair Fluid Controls Inc).
There are 12 known substitutes for 4820-00-239-2991: 5342-00-218-5906, 3120-00-378-9717, 5950-00-393-1514 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 3251: Material: STEEL FLOW CONTROL DEVICE; Connection Type: THREADED EXTERNAL TUBE FIRST END; Thread Series Designator: UNF FIRST END; Nominal Thread Size: 0.750 INCHES FIRST END IN. 8 total characteristics are documented in the Federal Logistics Information System.