33A57-1

View detailed technical data, stock status, and sourcing information for: 33A57-1
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Federal Supply Group

Electrical and Electronic Equipment Components

Federal Supply Classification

5977 Electrical Contact Brushes and Electrodes

National Stock Number

5977-00-388-0571

Item Name Code

00302

Assigment Date

01/01/1963 (63 years ago)

An item specifically designed to be used in the transfer of electrical energy to or from another conducting surface. Either the brush or the surface is continually moving during the transfer of energy. The brush is usually composed in part of some form of the element carbon. Includes: (1) a single brush either with or without an attached shunt (flexible wire lead) and/or a helical or flat type pressure spring; (2) a split brush composed of two or more pieces (wafers), which are used in place of one brush usually connected together by individual shunts to a common terminal; (3) paired brushes composed of two identical or non-identical brushes connected together by a common shunt either with or without pressure springs or connected by individual shunts to a common terminal, or with pressure springs and connected to a common bar, bracket or the like either with or without individual shunts; (4) multiple brushes composed of more than two identical or non-identical brushes without pressure springs connected by individual shunts to a common terminal, or with pressure springs and connected to a common bar, bracket or the like by individual shunts. Does not include moving contacts which make and slide past stationary contacts, but are stationary while the circuit is conducting, such as the sliding contacts on a rheostat or the stationary contact on a synchro. Excludes: contact, electrical; and contact assembly, electrical.

0.063 inches nominal head length, 5 shunt position designator, 0.250 inches nominal width, 0.240 inches nominal head diameter, rectangular commutator body style

Product Characteristics

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

Shunt Position Designator: 5
Body Style: rectangular commutator
Head Diameter: 0.240 inches nominal
Head Length: 0.063 inches nominal
Width: 0.250 inches nominal
Thickness: 0.250 inches nominal
Length: 1.313 inches nominal
Terminal Diameter: 0.406 inches nominal
Spring Free Length: 2.500 inches nominal
Largest Outside Diameter: 0.280 inches nominal
Brush Shunt Length: 2.125 inches nominal single shunt
Top Style: cylindrical head
Contact Face Style: flat
Shunt Insulation Provision And Quantity: 1 uninsulated
Pressure Spring Type And Quantity: 1 cylindrical
Special Features: spring compression force to be 6.250 oz. min at 2.000 in.,9.000 oz. max at 1.625 in.
Material: electrographitic
Material Document And Classification: union carbide corp,gr f28 mfr ref single material response
Style Designator: one piece
Terminal Type And Quantity: 1 round cap

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
33A57-1	Electrical Contact Brush
RC08-0814	Electrical Contact Brush

FAQs

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

What is the FSCG of the NSN 5977-00-388-0571?

The FSCG of the NSN 5977-00-388-0571 is 5977

Does the NSN 5977-00-388-0571 have a Schedule B code assigned?

Yes, the Schedule B code is 8545200000

Does NSN 5977-00-388-0571 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 5977-00-388-0571 contain precious materials?

Item does not contain precious metal.

Does NSN 5977-00-388-0571 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 5977-00-388-0571 was assigned to the Federal Catalog?

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