The Seat,valve, cataloged under National Stock Number 4820-01-121-1855, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Ingersoll-Dresser Pump Co. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-121-1855 |
| Primary Part Number | F254B-PIECE62 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ingersoll-Dresser Pump Co |
| Status | ACTIVE |
| Body Outside Diameter | 2.378 INCHES NOMINAL IN |
| Body Inside Diameter | 1.500 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Seating Surface Shape | FLAT |
| Material | STEEL CORROSION RESISTING OVERALL |
| Under Flange Height | 0.562 INCHES NOMINAL IN |
| Flange Diameter | 3.595 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 0.253 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| F254B-PIECE62 | Ingersoll-Dresser Pump Co (USA) |
| TB614 | Ingersoll-Dresser Pump Co (USA) |
| F-254-B | Ingersoll-Dresser Pump Co (USA) |
NSN 4820-01-121-1855 is a Seat,valve, manufactured by Ingersoll-Dresser Pump Co, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-121-1855 has 3 cross-referenced part numbers: F254B-PIECE62 (Ingersoll-Dresser Pump Co), TB614 (Ingersoll-Dresser Pump Co), F-254-B (Ingersoll-Dresser Pump Co).
There are 5 known substitutes for 4820-01-121-1855: 4730-01-120-5680, 4820-01-120-8271, 4320-01-120-8320 and 2 more. Verify interchangeability with system specifications before substitution.
Key specifications for F254B-PIECE62: Body Outside Diameter: 2.378 INCHES NOMINAL IN; Body Inside Diameter: 1.500 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED; Seating Surface Shape: FLAT. 8 total characteristics are documented in the Federal Logistics Information System.