The Seat,valve, cataloged under National Stock Number 4820-00-377-9444, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ingersoll-Rand Company Dba Rotary Compressor Division. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-377-9444 |
| Primary Part Number | 17K4NC |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ingersoll-Rand Company Dba Rotary Compressor Division |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.156 INCHES NOMINAL IN |
| Flange Diameter | 2.125 INCHES NOMINAL IN |
| Special Test Features | 10 HOLES,0.250 IN. ID,EQUALLY SPACED ON 1.312 IN. BOLT CIRCLE DIA IN |
| Body Outside Diameter | 1.906 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.312 INCHES NOMINAL IN |
| Under Flange Height | 0.188 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 17K4NC PRIMARY | Ingersoll-Rand Company Dba Rotary Compressor Division (USA) |
| Reference | Meaning |
|---|---|
| 17K4NC | 5/9 Secondary reference Ingersoll Rand Co |
| 17K4NC | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-377-9444 is a Seat,valve, manufactured by Ingersoll-Rand Company Dba Rotary Compressor Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-377-9444 has 1 manufacturer part number on file: 17K4NC (Ingersoll-Rand Company Dba Rotary Compressor Division).
Key specifications for 17K4NC: Flange Seat to Disk End Height: 0.156 INCHES NOMINAL IN; Flange Diameter: 2.125 INCHES NOMINAL IN; Special Test Features: 10 HOLES,0.250 IN. ID,EQUALLY SPACED ON 1.312 IN. BOLT CIRCLE DIA IN; Body Outside Diameter: 1.906 INCHES NOMINAL IN. 9 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.