51-1921-5B2

View detailed technical data, stock status, and sourcing information for: 51-1921-5B2
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Federal Supply Group

Electrical and Electronic Equipment Components

Federal Supply Classification

5930 Switches

National Stock Number

5930-01-026-2264

Item Name Code

02134

Assigment Date

08/19/1976 (50 years ago)

A switch actuated by a definite angular rotation of the switch shaft about its axis. It consists of a body,switch and a control,rotary switch. For items having rated actuation travel and pressure characteristics, see switch,sensitive. Excludes relay,rotary; switch,stepping; and switch,telephone (as modified).

0.250 inches nominal single actuator first flat length, explosion proof hazardous locations/environmental protection, 3.283 inches nominal overall length, 2a single mounting facility thread class, 0.437 inches nominal single mounting facility thread length

Product Characteristics

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

Thread Class: 2a single mounting facility
Thread Length: 0.437 inches nominal single mounting facility
Hazardous Locations/Environmental Protection: explosion proof
Overall Length: 3.283 inches nominal
First Flat Length: 0.250 inches nominal single actuator
Flat Height: 0.216 inches nominal single actuator
Shaft Diameter: 0.250 inches nominal single actuator
Shaft Length: 0.437 inches nominal single actuator
Overall Diameter: 1.000 inches minimum and 1.306 inches maximum
Nonturn Device Radius: 0.375 inches nominal at 3:00 o'clock
Individual Section Quantity: 5
Nonturn Device Type: tab at 3:00 o'clock
Operating Temp Range: -65.0 to 85.0 celsius
Switch Contact Basic Design: nonpile-up symmetrical
Pole Quantity: 1 each section front
Throw Quantity: 2 each section rear
Mounting Method: threaded bushing single mounting facility
Nominal Thread Size: 0.375 inches single mounting facility
Contact Voltage Rating In Volts: 115.0 ac at sea level
Contact Voltage Rating In Volts: 28.0 dc at sea level
Shaft Flat/Slot Angular Location: 195.0 degrees from nonturn device single actuator
Rotor Through Connection Quantity: 1 each section
Switch Actuator Indexing Position Quantity: 2 single actuator
Shaft Type: round, flatted single actuator
Terminal Type: tab, solder lug
Contact Switching Action: breaks before makes each section rear
Switch Actuator Positioning Increment: 90.0 degrees single actuator
Detent Rotational Torque Range: +1.000 to 4.500 inch-pounds single actuator
Switch Actuator Stop Device Type: fixed stop single actuator
Contact Load Current Rating: 75.0 milliamperes resistive load ac at sea level
Contact Load Current Rating: 250.0 milliamperes resistive load and 100.0 milliamperes inductive load dc at sea level
Style Designator: tap, circular, bushing mount
Test Data Document: "81349-mil-s-3786 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.)."
Thread Series Designator: unef single mounting facility
Specification/Standard Data: 81349-mil-s-3786/4 government specification

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
44M90-05-1-2N	Rotary Switch
4M90EB1-5N2	Rotary Switch
51-1921-5B2	Rotary Switch
M3786/4-1161	Rotary Switch

FAQs

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

What is the FSCG of the NSN 5930-01-026-2264?

The FSCG of the NSN 5930-01-026-2264 is 5930

Does the NSN 5930-01-026-2264 have a Schedule B code assigned?

Yes, the Schedule B code is 8536509025

Does NSN 5930-01-026-2264 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 5930-01-026-2264 contain precious materials?

Precious metal content is unknown

Does NSN 5930-01-026-2264 contain hazardous materials?

Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of fed std 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.

When the NSN 5930-01-026-2264 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Thu, Aug 19, 1976