3120-00-485-6978

Find complete technical information, availability, and procurement data for: 3120-00-485-6978
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-00-485-6978

Item Name Code

13205

Assigment Date

01/01/1963 (63 years ago)

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes:disk, valve, graphite impregnated and lubricated items.

2.3800 inches nominal flange outside diameter, 0.1238 inches minimum and 0.1243 inches maximum flange width, 2.0020 inches minimum and 2.0030 inches maximum body outside diameter, 1.7250 inches nominal body inside diameter, 1.0000 inches nominal overall length

Product Characteristics

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

Overall Length: 1.0000 inches nominal
Body Outside Diameter: 2.0020 inches minimum and 2.0030 inches maximum
Body Inside Diameter: 1.7250 inches nominal
Flange Outside Diameter: 2.3800 inches nominal
Flange Width: 0.1238 inches minimum and 0.1243 inches maximum
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 left corner
Corner Shape: square inside right corner
Corner Shape: square outside right corner
Hardness Rating: 40.0 rockwell c minimum and 43.0 rockwell c maximum overall
Surface Finish: 100.0 microinches inside diameter surface of body
Surface Finish: 100.0 microinches outside diameter surface of body
Surface Finish: 100.0 microinches outside diameter surface of flange
Surface Finish: 100.0 microinches right end surface of body
Surface Finish: 100.0 microinches right end surface of left flange
Surface Finish: 40.0 microinches left end surface of body and flange
Material: steel comp 4140 overall
Surface Treatment: cadmium inside diameter surface of body
Surface Treatment: cadmium outside diameter surface of body
Surface Treatment: cadmium outside diameter surface of flange
Surface Treatment: cadmium right end surface of body
Surface Treatment: cadmium right end surface of left flange
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:

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8657-62	Sleeve Bearing

FAQs

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

What is the FSCG of the NSN 3120-00-485-6978?

The FSCG of the NSN 3120-00-485-6978 is 3120

Does the NSN 3120-00-485-6978 have a Schedule B code assigned?

Yes, the Schedule B code is 8482997090

Does NSN 3120-00-485-6978 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 3120-00-485-6978 contain precious materials?

Item does not contain precious metal.

Does NSN 3120-00-485-6978 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 3120-00-485-6978 was assigned to the Federal Catalog?

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