181988

View detailed technical data, stock status, and sourcing information for: 181988

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181988
Federal Supply Group
Valves
Federal Supply Classification
4820 Nonpowered Valves
National Stock Number
4820-00-803-6030
Item Name Code
35224
Assigment Date
05/08/1968 (58 years ago)

A replaceable item designed to provide a stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see insert, engine valve seat.

1.025 inches nominal overall height, 0.125 inches nominal shank diameter, 0.600 inches nominal flange seat to disk end height, 0.125 inches nominal under flange height, 0.100 inches nominal tip diameter

Product Characteristics

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

Shank Diameter
0.125 inches nominal
Tip Diameter
0.100 inches nominal
Overall Height
1.025 inches nominal
Flange Seat To Disk End Height
0.600 inches nominal
Under Flange Height
0.125 inches nominal
Seat Angle
37.0 degrees nominal
Material
tungsten carbide
Style Designator
poppet

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN Name Date
4810-00-860-5664 No Name Available 10/01/1976

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
181988 Valve Disk
220004PC29 Valve Disk
227564PC28 Valve Disk
227574PC28 Valve Disk
4820PL1381584 Valve Disk

FAQs

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

What is the FSCG of the NSN 4820-00-803-6030?
The FSCG of the NSN 4820-00-803-6030 is 4820
Does the NSN 4820-00-803-6030 have a Schedule B code assigned?
Yes, the Schedule B code is 8481909090
Does NSN 4820-00-803-6030 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 4820-00-803-6030 contain precious materials?
Precious metal content is unknown
Does NSN 4820-00-803-6030 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 4820-00-803-6030 was assigned to the Federal Catalog?
It was assigned 58 years ago, on Wed, May 8, 1968

Professional Distribution

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