2990-00-657-7580

Find complete technical information, availability, and procurement data for: 2990-00-657-7580
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2990 Nonaircraft Miscellaneous Engine Accessories

National Stock Number

2990-00-657-7580

Item Name Code

77777

Assigment Date

01/01/1963 (63 years ago)

An open- or close-wound coil spring, consisting of one or more helical coils wound from different shapes and types of material and finished at the ends, designed to exert pressure in a rotating direction around the coil axis. Excludes:springs designed for thermal actuation (springs in which the torsion forces are counteracted by changes in temperature) and spring,reinforcing,hose.

steel; 2.935 in. o/a lg; 2.735 in. lg cylinder,2.625 in. lg piston; 0.750 in. cylinder od; 0.500 in. piston id,0.709 in. piston od general characteristics item description

Product Characteristics

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

General Characteristics Item Description: steel; 2.935 in. o/a lg; 2.735 in. lg cylinder,2.625 in. lg piston; 0.750 in. cylinder od; 0.500 in. piston id,0.709 in. piston od

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
6525020	Hydrostarter Piston

FAQs

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

What is the FSCG of the NSN 2990-00-657-7580?

The FSCG of the NSN 2990-00-657-7580 is 2990

Does NSN 2990-00-657-7580 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 2990-00-657-7580 contain precious materials?

Precious metal content is unknown

Does NSN 2990-00-657-7580 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 2990-00-657-7580 was assigned to the Federal Catalog?

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