The Guide,valve Stem, cataloged under National Stock Number 2810-00-346-4547, is classified within Federal Supply Class 2810 (Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2810-00-346-4547 |
| Primary Part Number | 127422R8 |
| Item Name | Guide,valve Stem |
| FSC / FSG | 2810 / 28 — Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| FSC Application Data | ACFT ENG R2000 |
| Major Diameter Length | 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Bb End Shank Diameter | 0.966 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Bore Counterbore | NOT INCLUDED |
| Outside Diameter | 1.159 INCHES NOMINAL IN |
| Bore Diameter | 0.5800 INCHES NOMINAL IN |
| Material | STEEL OR COPPER ALLOY |
| Shoulder First Fillet Radius | 0.005 INCHES MINIMUM AND 0.015 INCHES MAXIMUM IN |
| Bore Countersink | NOT INCLUDED |
| 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 |
|---|---|
| 127422R8 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 127422R8 | 5/9 Secondary reference Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. |
| AS127422R8 | 5/9 Secondary reference Aircraft Supplies |
NSN 2810-00-346-4547 is a Guide,valve Stem, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 2810, Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components. Status: active.
NSN 2810-00-346-4547 has 1 manufacturer part number on file: 127422R8 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 127422R8: FSC Application Data: ACFT ENG R2000; Major Diameter Length: 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN; Bb End Shank Diameter: 0.966 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 10 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.