The Seat,valve, cataloged under National Stock Number 4820-01-120-8271, 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 9 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-120-8271 |
| Primary Part Number | F254B |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ingersoll-Dresser Pump Co |
| Status | ACTIVE |
| Body Inside Diameter | 1.553 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.000 NOMINAL |
| Style Designator | PLAIN FLANGED |
| Seating Surface Shape | ANGULAR |
| Material | STEEL COMP 304 OVERALL |
| Flange Seat to Disk End Height | 0.375 INCHES NOMINAL IN |
| Body Outside Diameter | 2.628 INCHES NOMINAL IN |
| Flange Diameter | 2.782 INCHES NOMINAL IN |
| Under Flange Height | 0.562 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| F254B | Ingersoll-Dresser Pump Co (USA) |
| F254B-PIECE61 | Ingersoll-Dresser Pump Co (USA) |
| TB613 | Ingersoll-Dresser Pump Co (USA) |
NSN 4820-01-120-8271 is a Seat,valve, manufactured by Ingersoll-Dresser Pump Co, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-120-8271 has 3 cross-referenced part numbers: F254B (Ingersoll-Dresser Pump Co), F254B-PIECE61 (Ingersoll-Dresser Pump Co), TB613 (Ingersoll-Dresser Pump Co).
There are 6 known substitutes for 4820-01-120-8271: 4730-01-120-5680, 4320-01-120-8320, 4320-01-121-0513 and 3 more. Verify interchangeability with system specifications before substitution.
Key specifications for F254B: Body Inside Diameter: 1.553 INCHES NOMINAL IN; Seat Angle in Deg: 45.000 NOMINAL; Style Designator: PLAIN FLANGED; Seating Surface Shape: ANGULAR. 9 total characteristics are documented in the Federal Logistics Information System.