BM59770

View detailed technical data, stock status, and sourcing information for: BM59770
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Federal Supply Group

Engines, Turbines, and Components

Federal Supply Classification

2815 Diesel Engines and Components

National Stock Number

2815-00-795-6660

Item Name Code

16509

Assigment Date

01/01/1960 (66 years ago)

4.125 inches nominal diameter, 4.931 inches nominal overall height, finished surface finish, relieved head style, 1.5000 inches nominal pinhole diameter

Product Characteristics

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

Head Style: relieved
Overall Height: 4.931 inches nominal
Diameter: 4.125 inches nominal
Pinhole Diameter: 1.5000 inches nominal
Surface Finish: finished
Finished Size Designation: standard
Skirt Type: solid
Skirt Bottom Cutaway Feature: not included
Ring Groove Quantity: 4
Ring Groove Width: 0.1890 inches nominal 4th ring
Ring Groove Width: 0.0625 inches minimum and 0.1240 inches maximum 1st ring
Ring Groove Width: 0.0625 inches minimum and 0.1240 inches maximum 2nd ring
Ring Groove Width: 0.0625 inches minimum and 0.1240 inches maximum 3rd ring
Ring Groove Diameter: 3.689 inches nominal 4th ring
Ring Groove Diameter: 3.712 inches nominal 1st ring
Ring Groove Diameter: 3.732 inches nominal 2nd ring
Ring Groove Diameter: 3.732 inches nominal 3rd ring
Oil Groove: not included
Distance From Pin Hole Center To Extreme Top: 3.031 inches nominal
Pin Hole Bushing: not included
Distance Between Pin Bosses: 1.350 inches nominal
Retaining Ring Groove: included
Pin: included
Pin Type For Which Designed: floating
Ring: included
Carbon Groove: not included
Material: aluminum alloy
Weight: 58.0 ounces

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2815-00-705-9264	No Name Available	03/20/1968
2815-00-870-7300	No Name Available	01/15/1969

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
BM59770	Internal Combustion Engin Piston
L160F	Internal Combustion Engin Piston

FAQs

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

What is the FSCG of the NSN 2815-00-795-6660?

The FSCG of the NSN 2815-00-795-6660 is 2815

Does the NSN 2815-00-795-6660 have a Schedule B code assigned?

Yes, the Schedule B code is 8409998000

Does NSN 2815-00-795-6660 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 2815-00-795-6660 contain precious materials?

Precious metal content is unknown

Does NSN 2815-00-795-6660 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 2815-00-795-6660 was assigned to the Federal Catalog?

It was assigned 66 years ago, on Fri, Jan 1, 1960