The Piston,internal Combustion Engin, cataloged under National Stock Number 2805-01-021-4287, 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 Renk America Llc Div Renk America. Government technical data includes 26 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-01-021-4287 |
| Primary Part Number | F135A04021E |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Renk America Llc Div Renk America |
| Status | ACTIVE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.0950 INCHES NOMINAL SECOND RING IN |
| Ring Groove Width | 0.1880 INCHES NOMINAL FOURTH RING IN |
| Ring Groove Width | 0.0820 INCHES NOMINAL FIRST RING IN |
| Ring Groove Width | 0.0950 INCHES NOMINAL THIRD RING IN |
| Distance Between Pin Bosses | 1.281 INCHES NOMINAL IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Oil Passage Type | SLOT THIRD RING |
| Diameter | 3.125 INCHES NOMINAL IN |
| Ring Groove Diameter | 2.774 INCHES NOMINAL FOURTH RING IN |
| Ring Groove Diameter | 2.778 INCHES NOMINAL FIRST RING IN |
| Ring Groove Diameter | 2.778 INCHES NOMINAL SECOND RING IN |
| Ring Groove Diameter | 2.778 INCHES NOMINAL THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 2.000 INCHES NOMINAL IN |
| Pin | INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | NOT INCLUDED |
| Head Style | FLAT |
| Ring Groove Quantity | 4 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 0.8605 INCHES NOMINAL IN |
| Pin Hole Bushing | NOT INCLUDED |
| Skirt Type | SOLID |
| 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 |
|---|---|
| 4908672-1 | Kalmar AC Inc (USA) |
| F135A04021E PRIMARY | Renk America Llc Div Renk America (USA) |
| Reference | Meaning |
|---|---|
| 74908672 | C/1 Advisory reference — outside the item-of-supply concept Kalmar AC Inc |
| A-1556P | 5/9 Secondary reference U.S. Government activity |
| F135A040201E | 5/9 Secondary reference Renk America Llc Div Renk America |
NSN 2805-01-021-4287 is a Piston,internal Combustion Engin, manufactured by Renk America Llc Div Renk America, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-01-021-4287 has 2 manufacturer part numbers on file: 4908672-1 (Kalmar AC Inc), F135A04021E (Renk America Llc Div Renk America).
Key specifications for F135A04021E: Overall Height: 3.470 INCHES NOMINAL IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.0950 INCHES NOMINAL SECOND RING IN; Ring Groove Width: 0.1880 INCHES NOMINAL FOURTH RING IN. 26 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.