7640492

View detailed technical data, stock status, and sourcing information for: 7640492

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7640492
Federal Supply Group
Fire Control Equipment
Federal Supply Classification
1240 Optical Sighting and Ranging Equipment
National Stock Number
1240-00-764-0492
Item Name Code
22120
Assigment Date
01/01/1962 (64 years ago)

A resistor in which a sliding or rolling contact moves over an exposed area of the resistive element to change the ohmic value of the output. The functional tolerance (linearity), if given, of the output is greater than plus of minus 1 percent on linear outputs. Specified outputs such as sine, cosine, tangent, and the like, shall be considered to be precision. For items having manually positioned taps designed to be set and fixed prior to use, see resistor, adjustable. For items with step by step variation, see rheostat and resistor, step by step. For tandem-mounted items designed to function together as an attenuator (and rated accordingly), see attenuator, variable. Excludes:resistor (1), variable, nonwire wound; nonprecision; resistor (1), variable, nonwire wound, precision; and resistor (1), variable, wire wound, precision.

3.250 inches attachment end inside diameter, rubber isobutylene-isoprene class iir or rubber butadiene-styrene class sbr material, ring attachment method, 3.125 inches nominal overall length, 2.000 inches viewing end inside 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
3.125 inches nominal
Attachment Method
ring
Viewing End Inside Diameter
2.000 inches
Attachment End Inside Diameter
3.250 inches
Material
rubber isobutylene-isoprene class iir or rubber butadiene-styrene class sbr
Material Document And Classification
mil-r-3065, grade rs806abf mil spec all material responses
Fsc Application Data
telescope,m91c,integrated with fire control equipment

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
7640492 Optical Instrument Eyeshield
801422 Optical Instrument Eyeshield

FAQs

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

What is the FSCG of the NSN 1240-00-764-0492?
The FSCG of the NSN 1240-00-764-0492 is 1240
Does the NSN 1240-00-764-0492 have a Schedule B code assigned?
Yes, the Schedule B code is 9803200000
Does NSN 1240-00-764-0492 require demilitarization?
Usml items - mutilation to the point of scrap required worldwide. (note 7).
Does NSN 1240-00-764-0492 contain precious materials?
Item does not contain precious metal.
Does NSN 1240-00-764-0492 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 1240-00-764-0492 was assigned to the Federal Catalog?
It was assigned 64 years ago, on Mon, Jan 1, 1962

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