The Guide,valve Stem, cataloged under National Stock Number 2810-00-335-4816, 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 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2810-00-335-4816 |
| Primary Part Number | 228010R1 |
| 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 |
| Width Across Flats | 0.291 INCHES MINIMUM AND 0.293 INCHES MAXIMUM IN |
| Aa End Chamfer Angle in Deg | 45.0 |
| Aa End Chamfer Length | 0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN |
| Major Diameter Length | 4.169 INCHES MINIMUM AND 4.209 INCHES MAXIMUM IN |
| Bb End Shank Diameter | 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM IN |
| Style Designator | SHOULDERED W/FLATS SHANK END |
| Material Document and Classification | AMS 4118 ASSN STD 1ST MATERIAL RESPONSE |
| Bore Counterbore | NOT INCLUDED |
| Outside Diameter | 1.075 INCHES MINIMUM AND 1.085 INCHES MAXIMUM IN |
| Flats Length | 1.016 INCHES NOMINAL IN |
| Bb End Chamfer Length | 0.156 INCHES NOMINAL IN |
| Bb End Chamfer Angle in Deg | 45.0 |
| Bore Diameter | 0.8160 INCHES MINIMUM AND 0.8180 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY 2017 |
| Shoulder First Fillet Radius | 0.062 INCHES MINIMUM AND 0.125 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 |
NSN 2810-00-335-4816 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 2810-00-335-4816 has 2 manufacturer part numbers on file: 228010R1 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.), 228010R1 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 228010R1: Width Across Flats: 0.291 INCHES MINIMUM AND 0.293 INCHES MAXIMUM IN; Aa End Chamfer Angle in Deg: 45.0; Aa End Chamfer Length: 0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN; Major Diameter Length: 4.169 INCHES MINIMUM AND 4.209 INCHES MAXIMUM IN. 16 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.