The Guide,valve Stem, cataloged under National Stock Number 2810-00-560-0741, 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 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2810-00-560-0741 |
| Primary Part Number | 166282R11 |
| 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 R2800 |
| Aa End Chamfer Angle in Deg | 30.0 |
| Aa End Chamfer Length | 0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Major Diameter Length | 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Bb End Shank Diameter | 0.9255 INCHES MINIMUM AND 0.9265 INCHES MAXIMUM IN |
| Style Designator | PLAIN FLANGED |
| Bore Counterbore | NOT INCLUDED |
| Outside Diameter | 1.240 INCHES NOMINAL IN |
| Bore Diameter | 0.6400 INCHES MINIMUM AND 0.6430 INCHES MAXIMUM IN |
| Material | STEEL |
| Shoulder First Fillet Radius | 0.005 INCHES MINIMUM AND 0.015 INCHES MAXIMUM IN |
| Metallic Hardness Rating | 75.0 MINIMUM ROCKWELL B AND 88.0 MAXIMUM ROCKWELL B |
| 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 |
|---|---|
| 166282R011 | Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN) |
| 166282R11 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 166282R11 | Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN) |
| Reference | Meaning |
|---|---|
| AS166282R11 | 5/9 Secondary reference Aircraft Supplies |
| 166282R011 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| LA166282R11 | 5/9 Secondary reference Larson Aire Inc |
NSN 2810-00-560-0741 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 2810-00-560-0741 has 3 manufacturer part numbers on file: 166282R011 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.), 166282R11 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 166282R11 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.).
Key specifications for 166282R11: FSC Application Data: ACFT ENG R2800; Aa End Chamfer Angle in Deg: 30.0; Aa End Chamfer Length: 0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Major Diameter Length: 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN. 13 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.