177692-81

View detailed technical data, stock status, and sourcing information for: 177692-81
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-136-2024

Item Name Code

22113

Assigment Date

01/15/1969 (57 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.

0.280 inches minimum and 0.281 inches maximum body inside diameter, 0.005 inches minimum and 0.025 inches maximum seat radius, 0.497 inches minimum and 0.499 inches maximum flange diameter, 0.377 inches minimum and 0.379 inches maximum body outside diameter, 0.075 inches minimum and 0.076 inches maximum flange seat to disk end height

Product Characteristics

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

Flange Diameter: 0.497 inches minimum and 0.499 inches maximum
Body Outside Diameter: 0.377 inches minimum and 0.379 inches maximum
Body Inside Diameter: 0.280 inches minimum and 0.281 inches maximum
Seat Radius: 0.005 inches minimum and 0.025 inches maximum
Flange Seat To Disk End Height: 0.075 inches minimum and 0.076 inches maximum
Under Flange Height: 0.068 inches minimum and 0.073 inches maximum
Seating Surface Shape: radial
Material: plastic polyamide (nylon) overall
Material Document And Classification: mil-m-20693,type 3,grade natural color mil spec single material response overall
Style Designator: plain flanged

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
177692-81	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-00-136-2024?

The FSCG of the NSN 4820-00-136-2024 is 4820

Does the NSN 4820-00-136-2024 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-136-2024 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 4820-00-136-2024 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-136-2024 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 4820-00-136-2024 was assigned to the Federal Catalog?

It was assigned 57 years ago, on Wed, Jan 15, 1969