AS1790N

View detailed technical data, stock status, and sourcing information for: AS1790N
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Federal Supply Group

Engines, Turbines, and Components

Federal Supply Classification

2815 Diesel Engines and Components

National Stock Number

2815-00-020-4632

Item Name Code

15884

Assigment Date

01/01/1963 (63 years ago)

A mushroom or tulip-shaped item having a circular head with a conical face and an extended stem used to regulate the flow of incoming fuel-air mixture or air into the combustion chamber or exhaust gases from the combustion chamber of a reciprocating internal combustion engine.

1.7500 inches nominal outside diameter, 0.2031 inches nominal head height, 0.0312 inches nominal chamfer length, 30.0 chamfer angle in deg, flat head style

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
Head Height: 0.2031 inches nominal
Chamfer Angle In Deg: 30.0
Chamfer Length: 0.0312 inches nominal
Outside Diameter: 1.7500 inches nominal
Minor Outside Diameter: 0.3750 inches nominal
Minor Diameter Length: 0.7500 inches nominal
Seat Angle In Deg: 45.0
Stem Style: double grooved
Carbon Relief Groove: not included
Neck Radius: 0.3750 inches nominal
Stem Length: 6.8594 inches nominal
Stem Diameter: 0.4062 inches nominal
Distance From First Groove To Stem End: 0.3750 inches nominal
Distance From Second Groove To Stem End: 0.5312 inches nominal
First Groove Diameter: 0.3070 inches nominal
Second Groove Diameter: 0.3070 inches nominal
First Groove Width: 0.0625 inches nominal
Second Groove Width: 0.0625 inches nominal
Material And Location: unable to decode
Special Features: used on cummins diesel engine,mdl nvh450,vt600,nh220,nh,nhb,nhbb,nhe195,nh220b,nh220bi,nhs,nhrs,hhbs,nrt,nrto,nrtm,nh180,nh195,hr,hrbb,hrf,hrs,hrb,hrbs

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2815-00-315-7548	No Name Available	01/19/1968
2815-00-516-9194	No Name Available	03/06/1968
2815-00-930-3650	No Name Available	08/19/1966

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
144911	Engine Poppet Valve
3803522	Engine Poppet Valve
70671	Engine Poppet Valve
AS1790N	Engine Poppet Valve
E-326S	Engine Poppet Valve
V-1296X	Engine Poppet Valve

FAQs

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

What is the FSCG of the NSN 2815-00-020-4632?

The FSCG of the NSN 2815-00-020-4632 is 2815

Does the NSN 2815-00-020-4632 have a Schedule B code assigned?

Yes, the Schedule B code is 8409998000

Does NSN 2815-00-020-4632 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 2815-00-020-4632 contain precious materials?

Precious metal content is unknown

Does NSN 2815-00-020-4632 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 2815-00-020-4632 was assigned to the Federal Catalog?

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