2805-00-640-8646

Find complete technical information, availability, and procurement data for: 2805-00-640-8646
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Federal Supply Group

Engines, Turbines, and Components

Federal Supply Classification

2805 Except Aircraft; and Components Gasoline Reciprocating Engines

National Stock Number

2805-00-640-8646

Item Name Code

16509

Assigment Date

01/01/1963 (63 years ago)

flat head style, 3.125 inches nominal overall height, 2.817 inches nominal diameter, 0.7500 inches nominal pinhole diameter, hole oil passage type

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Head Style: flat
Overall Height: 3.125 inches nominal
Diameter: 2.817 inches nominal
Oil Passage Type: hole
Pinhole Diameter: 0.7500 inches nominal
Surface Finish: semifinished
Skirt Type: solid
Skirt Bottom Cutaway Feature: not included
Ring Groove Quantity: 4
Ring Groove Width: 0.1250 inches nominal 1st ring
Ring Groove Width: 0.1250 inches nominal 2nd ring
Ring Groove Width: 0.1870 inches nominal 3rd ring
Ring Groove Width: 0.1870 inches nominal 4th ring
Ring Groove Diameter: 2.573 inches nominal 1st ring
Ring Groove Diameter: 2.573 inches nominal 2nd ring
Ring Groove Diameter: 2.446 inches nominal 4th ring
Ring Groove Diameter: 2.451 inches nominal 3rd ring
Ring Groove Position Below Piston Pin: number 1,number 2,and number 3,number 4 all rings
Oil Groove: not included
Distance From Pin Hole Center To Extreme Top: 1.688 inches nominal
Pin Hole Bushing: not included
Distance Between Pin Bosses: 1.250 inches nominal
Retaining Ring Groove: included
Pin: not included
Pin Type For Which Designed: floating
Ring: not included
Carbon Groove: not included
Material: aluminum alloy
Weight: 9.7 ounces
Fsc Application Data: engine,reciprocating,gasoline

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2990-00-423-8968	No Name Available	01/01/1963

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
2F3664	Internal Combustion Engin Piston

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 2805-00-640-8646?

The FSCG of the NSN 2805-00-640-8646 is 2805

Does the NSN 2805-00-640-8646 have a Schedule B code assigned?

Yes, the Schedule B code is 8409918000

Does NSN 2805-00-640-8646 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 2805-00-640-8646 contain precious materials?

Item does not contain precious metal.

Does NSN 2805-00-640-8646 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 2805-00-640-8646 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963