The Tappet,engine Poppet Valve, cataloged under National Stock Number 2805-00-374-9443, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Stanadyne/chicago Div. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-374-9443 |
| Primary Part Number | I18-1856B |
| Item Name | Tappet,engine Poppet Valve |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Stanadyne/chicago Div |
| Status | ACTIVE |
| Cam End Diameter | 0.996 INCHES MINIMUM AND 0.997 INCHES MAXIMUM IN |
| Concentric Hole Depth | 1.709 INCHES MINIMUM AND 1.791 INCHES MAXIMUM IN |
| Style Designator | COUNTERBORED PUSH ROD END |
| Metallic Hardness Rating and Location | 52.0 ROCKWELL C MINIMUM FACE |
| Counterbore Depth | 1.496 INCHES MINIMUM AND 1.526 INCHES MAXIMUM IN |
| Adjustability | NONADJUSTABLE |
| Counterbore Diameter | 0.843 INCHES NOMINAL IN |
| Size Designation | STANDARD |
| Casehardening Indicator | NOT CASEHARDENED |
| Distance From Body Hole Center to Cam End | 0.625 INCHES NOMINAL IN |
| Concentric Hole Diameter | 0.688 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Body Hole Diameter | 0.250 INCHES NOMINAL IN |
| Material | IRON CAST OVERALL |
| Operation Method | MECHANICAL |
| 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 |
|---|---|
| I18-1856B PRIMARY | Stanadyne/chicago Div (USA) |
| Reference | Meaning |
|---|---|
| 75524R3 | 5/9 Secondary reference U.S. Government activity |
NSN 2805-00-374-9443 is a Tappet,engine Poppet Valve, manufactured by Stanadyne/chicago Div, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-374-9443 has 1 manufacturer part number on file: I18-1856B (Stanadyne/chicago Div).
Key specifications for I18-1856B: Cam End Diameter: 0.996 INCHES MINIMUM AND 0.997 INCHES MAXIMUM IN; Concentric Hole Depth: 1.709 INCHES MINIMUM AND 1.791 INCHES MAXIMUM IN; Style Designator: COUNTERBORED PUSH ROD END; Metallic Hardness Rating and Location: 52.0 ROCKWELL C MINIMUM FACE. 14 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.