2F2256

View detailed technical data, stock status, and sourcing information for: 2F2256
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Federal Supply Group

Engines, Turbines, and Components

Federal Supply Classification

2815 Diesel Engines and Components

National Stock Number

2815-00-395-4831

Item Name Code

16509

Assigment Date

01/01/1961 (65 years ago)

4.250 inches nominal diameter, 1.8460 inches minimum and 1.8560 inches maximum pinhole diameter, contour head style, 6.125 inches nominal overall height, finished surface finish

Product Characteristics

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

Head Style: contour
Overall Height: 6.125 inches nominal
Diameter: 4.250 inches nominal
Pinhole Diameter: 1.8460 inches minimum and 1.8560 inches maximum
Surface Finish: finished
Finished Size Designation: standard
Skirt Type: solid
Skirt Bottom Cutaway Feature: not included
Ring Groove Quantity: 6
Ring Groove Width: 3.6880 inches minimum and 3.8390 inches maximum 1st ring
Ring Groove Diameter: 0.188 inches nominal all rings
Oil Groove: included
Distance From Pin Hole Center To Extreme Top: 3.688 inches nominal
Pin Hole Bushing: included
Retaining Ring Groove: included
Pin: included
Pin Type For Which Designed: locking
Ring: included
Carbon Groove: included
Material: aluminum alloy

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2815-00-325-3647	No Name Available	08/30/1967
2815-00-356-0866	No Name Available	01/24/1968

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
1H2690	Internal Combustion Engin Piston
2F2256	Internal Combustion Engin Piston
A926PAND6216	Internal Combustion Engin Piston

FAQs

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

What is the FSCG of the NSN 2815-00-395-4831?

The FSCG of the NSN 2815-00-395-4831 is 2815

Does the NSN 2815-00-395-4831 have a Schedule B code assigned?

Yes, the Schedule B code is 8409998000

Does NSN 2815-00-395-4831 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 2815-00-395-4831 contain precious materials?

Precious metal content is unknown

Does NSN 2815-00-395-4831 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 2815-00-395-4831 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961