4820-00-593-4903

Find complete technical information, availability, and procurement data for: 4820-00-593-4903
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-593-4903

Item Name Code

22113

Assigment Date

01/01/1961 (65 years ago)

An item of any peripheral shape usually having one flat or spherical surface and a centrally located hole. It is designed for applications involving moving (kinetic) loads. Except for items fabricated from bearing quality synthetic (plastic) or composed of multilayer material, one bearing surface must either have a specific surface finish designation of 32 microinch (0.8 micrometre) or less, arithmetical average (aa) (arithmetic mean deviation) or one of the following conditions: be lapped or ground; have visible or detectable means of lubrication; grooves, indentations; or self-lubrication. The thickness must not exceed 25 percent of the outside diameter of the shortest distance between peripheral flats (when thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance). Excludes:straight, tubular (without flange) items having a bearing surface(s) parallel to the axis of the bore only. See also washer, flat and spacer, sleeve.

beaded seal accommodation type, 0.344 inches nominal overall height, 0.938 inches nominal body inside diameter, 1.750 inches nominal body outside diameter, 37.000 nominal seat angle in deg

Product Characteristics

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

Overall Height: 0.344 inches nominal
Body Outside Diameter: 1.750 inches nominal
Body Inside Diameter: 0.938 inches nominal
Seat Angle In Deg: 37.000 nominal
Seal Accommodation Type: beaded
Seating Surface Shape: angular
Special Features: four grooves on outer side 90 deg apart 1/16 by 1/32 in. deep
Material: plastic polyamide (nylon) overall
Style Designator: plain

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
20-03181	Valve Seat
20-03542ITEM1	Valve Seat
V-3181	Valve Seat
V3181	Valve Seat
V3542ITEM1	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-00-593-4903?

The FSCG of the NSN 4820-00-593-4903 is 4820

Does the NSN 4820-00-593-4903 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-593-4903 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 4820-00-593-4903 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-593-4903 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 4820-00-593-4903 was assigned to the Federal Catalog?

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