The Valve,poppet,engine, cataloged under National Stock Number 2805-00-386-3381, is classified within Federal Supply Class 2805 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Eaton Corporation. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-386-3381 |
| Primary Part Number | C581 |
| Item Name | Valve,poppet,engine |
| FSC / FSG | 2805 / 28 — No Item Name Available |
| Manufacturer | Eaton Corporation |
| Status | ACTIVE |
| Stem Style | TAPERED |
| Metallic Hardness Rating and Location | 40.0 ROCKWELL C MAXIMUM TIP |
| Chamfer Angle in Deg | 45.0 |
| Metallic Hardness Rating and Location | 50.0 ROCKWELL C MINIMUM HEAD |
| FSC Application Data | GASOLINE ENGINE |
| Metallic Hardness Rating and Location | 40.0 ROCKWELL C MAXIMUM STEM |
| Metallic Hardness Rating and Location | 30.0 ROCKWELL C MINIMUM STEM |
| Outside Diameter | 1.5625 INCHES MINIMUM AND 1.5725 INCHES MAXIMUM IN |
| Distance From Minor Diameter to Stem End | 0.2170 INCHES MINIMUM AND 0.2190 INCHES MAXIMUM IN |
| Seat Angle in Deg | 45.0 |
| Head Height | 0.1960 INCHES MINIMUM AND 0.2060 INCHES MAXIMUM IN |
| Chamfer Length | 0.0300 INCHES NOMINAL IN |
| Minor Diameter Length | 0.1900 INCHES NOMINAL IN |
| Stem Diameter | 0.3720 INCHES MINIMUM AND 0.3730 INCHES MAXIMUM IN |
| Neck Radius | 0.4700 INCHES NOMINAL IN |
| Carbon Relief Groove | NOT INCLUDED |
| Minor Outside Diameter | 0.2450 INCHES MINIMUM AND 0.2490 INCHES MAXIMUM IN |
| Stem Length | 4.8070 INCHES MINIMUM AND 4.8170 INCHES MAXIMUM IN |
| Metallic Hardness Rating and Location | 30.0 ROCKWELL C MINIMUM TIP |
| Taper Angle in Deg | 15.0 |
| Head Style | FLAT |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 2805-00-386-3381 is a Valve,poppet,engine, manufactured by Eaton Corporation, classified under FSC 2805 (No Item Name Available). Status: active.
NSN 2805-00-386-3381 has 5 cross-referenced part numbers: C581 (Eaton Corporation), 44016A (Brinkley Technology Group Llc Dba Hercules Manufacturing), CV1261 (Eaton Corp Spring Div), C581 (Eaton Corp Spring Div), 44016A (Hercules Engine Co Inc).
There is 1 known substitute for 2805-00-386-3381: 4730-01-509-4397. Verify interchangeability with system specifications before substitution.
Key specifications for C581: Stem Style: TAPERED; Metallic Hardness Rating and Location: 40.0 ROCKWELL C MAXIMUM TIP; Chamfer Angle in Deg: 45.0; Metallic Hardness Rating and Location: 50.0 ROCKWELL C MINIMUM HEAD. 21 total characteristics are documented in the Federal Logistics Information System.