The Valve,poppet,engine, cataloged under National Stock Number 2805-00-358-3741, 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 Brinkley Technology Group Llc Dba Hercules Manufacturing. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2805-00-358-3741 |
| Primary Part Number | 20026A |
| Item Name | Valve,poppet,engine |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Brinkley Technology Group Llc Dba Hercules Manufacturing |
| Status | ACTIVE |
| Stem Diameter | 0.3720 INCHES MINIMUM AND 0.3730 INCHES MAXIMUM IN |
| FSC Application Data | GASOLINEENGINE |
| Head Height | 0.2000 INCHES MINIMUM AND 0.2150 INCHES MAXIMUM IN |
| Stem Length | 5.5725 INCHES MINIMUM AND 5.6126 INCHES MAXIMUM IN |
| Seat Angle in Deg | 45.0 |
| Chamfer Length | 0.0300 INCHES NOMINAL IN |
| Neck Radius | 0.4400 INCHES NOMINAL IN |
| Minor Outside Diameter | 0.2450 INCHES MINIMUM AND 0.2490 INCHES MAXIMUM IN |
| Metallic Hardness Rating and Location | 40.0 ROCKWELL C MAXIMUM STEM |
| Metallic Hardness Rating and Location | 30.0 ROCKWELL C MINIMUM STEM |
| Metallic Hardness Rating and Location | 50.0 ROCKWELL C MINIMUM TIP |
| Outside Diameter | 1.7450 INCHES MINIMUM AND 1.7550 INCHES MAXIMUM IN |
| Stem Style | TAPERED |
| Taper Angle in Deg | 15.0 |
| Head Style | FLAT |
| Distance From Minor Diameter to Stem End | 0.2170 INCHES MINIMUM AND 0.2190 INCHES MAXIMUM IN |
| Carbon Relief Groove | NOT INCLUDED |
| Minor Diameter Length | 0.1880 INCHES NOMINAL IN |
| Chamfer Angle in Deg | 45.0 |
| 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 |
|---|---|
| 20026A PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 20026A | 5/9 Secondary reference Hercules Engine Co Inc |
| CV1256 | 5/2 Secondary reference U.S. Government activity |
NSN 2805-00-358-3741 is a Valve,poppet,engine, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-358-3741 has 1 manufacturer part number on file: 20026A (Brinkley Technology Group Llc Dba Hercules Manufacturing).
Key specifications for 20026A: Stem Diameter: 0.3720 INCHES MINIMUM AND 0.3730 INCHES MAXIMUM IN; FSC Application Data: GASOLINEENGINE; Head Height: 0.2000 INCHES MINIMUM AND 0.2150 INCHES MAXIMUM IN; Stem Length: 5.5725 INCHES MINIMUM AND 5.6126 INCHES MAXIMUM IN. 19 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.