The Valve,poppet,engine, cataloged under National Stock Number 2805-00-901-6734, 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 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-901-6734 |
| Primary Part Number | 6408946 |
| 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 | 0.4965 INCHES MINIMUM AND 0.4975 INCHES MAXIMUM IN |
| FSC Application Data | GASOLINE ENGINE |
| Head Height | 0.1950 INCHES MINIMUM AND 0.2050 INCHES MAXIMUM IN |
| Stem Length | 6.0550 INCHES MINIMUM AND 6.0580 INCHES MAXIMUM IN |
| Seat Angle in Deg | 45.0 |
| Chamfer Length | 0.0312 INCHES NOMINAL IN |
| Neck Radius | 0.5000 INCHES NOMINAL IN |
| Groove Diameter | 0.3380 INCHES MINIMUM AND 0.3420 INCHES MAXIMUM IN |
| Metallic Hardness Rating and Location | 30.0 ROCKWELL C MINIMUM OVERALL |
| Metallic Hardness Rating and Location | 40.0 ROCKWELL C MAXIMUM OVERALL |
| Distance From Groove to Stem End | 0.2000 INCHES MINIMUM AND 0.2020 INCHES MAXIMUM IN |
| Outside Diameter | 2.3700 INCHES MINIMUM AND 2.3800 INCHES MAXIMUM IN |
| Stem Style | GROOVED |
| Head Style | FLAT |
| Carbon Relief Groove | NOT INCLUDED |
| Chamfer Angle in Deg | 45.0 |
| Groove Width | 0.1350 INCHES MINIMUM AND 0.1450 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 6408946 PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| 6408946B | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| C1483 | 5/9 Secondary reference U.S. Government activity |
| 6408946 | 5/9 Secondary reference Hercules Engine Co Inc |
| 6408946B | 5/9 Secondary reference Hercules Engine Co Inc |
NSN 2805-00-901-6734 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 2805-00-901-6734 has 2 manufacturer part numbers on file: 6408946 (Brinkley Technology Group Llc Dba Hercules Manufacturing), 6408946B (Brinkley Technology Group Llc Dba Hercules Manufacturing).
2 possible matches (shared part number, not a government interchangeability claim): 5342-00-931-8878, 5310-01-353-2619. Verify interchangeability with system specifications before substitution.
Key specifications for 6408946: Stem Diameter: 0.4965 INCHES MINIMUM AND 0.4975 INCHES MAXIMUM IN; FSC Application Data: GASOLINE ENGINE; Head Height: 0.1950 INCHES MINIMUM AND 0.2050 INCHES MAXIMUM IN; Stem Length: 6.0550 INCHES MINIMUM AND 6.0580 INCHES MAXIMUM IN. 17 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.