A3521-1

View detailed technical data, stock status, and sourcing information for: A3521-1

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A3521-1
Federal Supply Group
Mechanical Power Transmission Equipment
National Stock Number
3020-00-161-7594
Item Name Code
08109
Assigment Date
11/05/1971 (54 years ago)

A fluid line fitting having a pipe, tube or hose connection or a through hole to accommodate a bolt, fluid passage on one end. The other end must have an internal or external quick disconnect feature for connecting a mating part to form a quick disconnect coupling assembly. The fitting may incorporate a self-sealing feature for the purpose of automatically shutting off the flow of fluid when disconnected from its mating half. For self-sealing fittings with an external or internal threaded disconnect end, see coupling half, self-sealing. See also, connector, multiple, fluid pressure line.

3.875 inches nominal groove width, 1.875 inches nominal bore diameter, 1.250 inches nominal groove depth, 10.500 inches nominal outside diameter, 4.000 inches nominal overall length

Product Characteristics

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

Groove Depth
1.250 inches nominal
Groove Width
3.875 inches nominal
Outside Diameter
10.500 inches nominal
Overall Length
4.000 inches nominal
Bore Diameter
1.875 inches nominal
Bore Length
4.000 inches nominal
Groove Radius
0.750 inches nominal
Face Width
3.875 inches nominal
Design Form
webbed
Bore Type
straight
Bearings
included
Groove Quantity
1
Counterbore Feature
not included
Bearing Quantity
2
Keying Facility
not included
Split Hub Feature
not included
Web/Spoke Relationship To Face Centerline
not offset
Lightening Hole
not included
Integral Cooling Vane
not included
Groove Shape
u
Bore Feature
included
Bearing Type
sleeve
Shaft Size For Which Designed
1.250 inches nominal
Protruding Hub Characteristic
plain
Hub End Outside Diameter And Location
3.000 inches nominal both ends
Distance From Outside Flange/Rim To Hub End And Location
0.062 inches nominal both ends
Material
steel overall
Style Designator
webbed or spoked

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
330-521-22PC8 Groove Pulley
A3521-1 Groove Pulley

FAQs

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

What is the FSCG of the NSN 3020-00-161-7594?
The FSCG of the NSN 3020-00-161-7594 is 3020
Does the NSN 3020-00-161-7594 have a Schedule B code assigned?
Yes, the Schedule B code is 8487900080
Does NSN 3020-00-161-7594 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 3020-00-161-7594 contain precious materials?
Precious metal content is unknown
Does NSN 3020-00-161-7594 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 3020-00-161-7594 was assigned to the Federal Catalog?
It was assigned 54 years ago, on Fri, Nov 5, 1971

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