4820-00-678-0261

Find complete technical information, availability, and procurement data for: 4820-00-678-0261
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-678-0261

Item Name Code

60396

Assigment Date

01/01/1963 (63 years ago)

A shaft having two or more different diameters (greater than 0.031 inches (0.79 millimeter)) along its length. It must have one or more of the following conditions: a specified surface finish designation in the range 1 to 125 microinches (0.025 to 3.2 micrometers) arithmetical average (aa), machined peripheral flat(s), circular groove(s), keyway(s), splines, threads, or holes. The ends and/or shoulders may be machined to accommodate bearings, couplings, and the like. It is not designed for use in aligning by fitting into corresponding holes of another item. For items used to support rotating members see axle(1), shouldered. For items not having any of the above conditions see pin, shoulder, headless. Excludes:shaft(1), straight; and axle(1), straight.

4.344 inches nominal bolt circle diameter, 0.203 inches nominal hole diameter, 4.844 inches nominal outside diameter, 0.203 inches nominal center hole diameter, 0.025 inches nominal material thickness

Product Characteristics

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

Hole Diameter: 0.203 inches nominal
Outside Diameter: 4.844 inches nominal
Bolt Circle Diameter: 4.344 inches nominal
Material Thickness: 0.025 inches nominal
Center Hole Diameter: 0.203 inches nominal
Bolt Hole Quantity: 1
Special Features: one hole 0.203 in. dia located 1.062 in. from center line; additional material: fiber
Material: rubber synthetic
Style Designator: flat

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
1791-25	Flat Valve Diaphragm
MR57	Flat Valve Diaphragm

FAQs

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

What is the FSCG of the NSN 4820-00-678-0261?

The FSCG of the NSN 4820-00-678-0261 is 4820

Does the NSN 4820-00-678-0261 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-678-0261 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 4820-00-678-0261 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-678-0261 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 4820-00-678-0261 was assigned to the Federal Catalog?

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