2578685-001A

View detailed technical data, stock status, and sourcing information for: 2578685-001A
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-00-451-5242

Item Name Code

13206

Assigment Date

06/02/1971 (55 years ago)

A tubular shaped item with a round or hexagon peripheral shape having two flat bearing surfaces perpendicular to the axis of the centrally located hole. It is designed to maintain a predetermined distance between assembled parts. The item may be with or without flange(s) of any peripheral shape. The overall length must exceed 25 percent of the outside diameter or distance across peripheral flats of the body. (when the length, outside diameter, and/or distance across peripheral flats are designed as a tolerance, the maximum dimension will be used to determine compliance). For items having other than a round or hexagon peripheral shape, see spacer, plate. Excludes:items with lubricating features, see bearing, sleeve and bushing, sleeve. See also bushing, tapered; spacer, ring; washer, flat; and washer, (as modified).

3.2500 inches nominal flange outside diameter, 0.9360 inches nominal overall length, 2.4940 inches minimum and 2.4990 inches maximum body inside diameter, 2.8100 inches nominal body outside diameter, 0.1560 inches nominal flange width

Product Characteristics

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

Overall Length: 0.9360 inches nominal
Body Outside Diameter: 2.8100 inches nominal
Body Inside Diameter: 2.4940 inches minimum and 2.4990 inches maximum
Flange Outside Diameter: 3.2500 inches nominal
Flange Width: 0.1560 inches nominal
Corner Shape: chamfered outside right corner
Corner Shape: chamfered inside left corner
Corner Shape: chamfered outside left corner
Corner Shape: square left flange body corner
Corner Shape: square left flange outside right corner
Corner Shape: square inside right corner
Surface Finish: 125.0 microinches intermediate layer
Material: copper alloy 172 or copper alloy 173 overall
Style Designator: solid, external flange one end

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
2578685-001A	Sleeve Bushing

FAQs

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

What is the FSCG of the NSN 3120-00-451-5242?

The FSCG of the NSN 3120-00-451-5242 is 3120

Does the NSN 3120-00-451-5242 have a Schedule B code assigned?

Yes, the Schedule B code is 8482997060

Does NSN 3120-00-451-5242 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 3120-00-451-5242 contain precious materials?

Precious metal content is unknown

Does NSN 3120-00-451-5242 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 3120-00-451-5242 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Wed, Jun 2, 1971