A75490

View detailed technical data, stock status, and sourcing information for: A75490
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-00-540-7724

Item Name Code

13206

Assigment Date

01/01/1963 (63 years ago)

A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes:packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.

0.5625 inches nominal overall length, 0.7500 inches nominal flange outside diameter, 0.0600 inches minimum and 0.0640 inches maximum flange width, 0.3150 inches minimum and 0.3200 inches maximum body inside diameter, 0.4380 inches minimum and 0.4400 inches maximum body outside diameter

Product Characteristics

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

Overall Length: 0.5625 inches nominal
Body Outside Diameter: 0.4380 inches minimum and 0.4400 inches maximum
Body Inside Diameter: 0.3150 inches minimum and 0.3200 inches maximum
Flange Outside Diameter: 0.7500 inches nominal
Flange Width: 0.0600 inches minimum and 0.0640 inches maximum
Corner Shape: square left flange body corner
Corner Shape: square left flange outside right corner
Corner Shape: square outside left corner
Corner Shape: square inside left corner
Corner Shape: square inside right corner
Corner Shape: square outside right corner
Hardness Rating: 27.0 rockwell c minimum and 33.0 rockwell c maximum overall
Surface Finish: 100.0 microinches intermediate layer
Material: steel overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: qq-p-416 fed spec single treatment response 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
A75490	Sleeve Bushing
S60-129	Sleeve Bushing

FAQs

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

What is the FSCG of the NSN 3120-00-540-7724?

The FSCG of the NSN 3120-00-540-7724 is 3120

Does the NSN 3120-00-540-7724 have a Schedule B code assigned?

Yes, the Schedule B code is 8482997060

Does NSN 3120-00-540-7724 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 3120-00-540-7724 contain precious materials?

Precious metal content is unknown

Does NSN 3120-00-540-7724 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 3120-00-540-7724 was assigned to the Federal Catalog?

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