8521A

View detailed technical data, stock status, and sourcing information for: 8521A
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Federal Supply Group

Bearings

Federal Supply Classification

3110 Unmounted Antifriction Bearings

National Stock Number

3110-00-953-4495

Item Name Code

00014

Assigment Date

05/04/1966 (60 years ago)

1.1150 inches minimum and 1.1250 inches maximum outer ring width, ground surface finish, 21.00 millimeters nominal inner ring width, 3.9990 inches minimum and 4.0000 inches maximum overall outside diameter, 35.00 millimeters nominal bore diameter

Product Characteristics

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

Bore Diameter: 35.00 millimeters nominal
Overall Outside Diameter: 3.9990 inches minimum and 4.0000 inches maximum
Outer Ring Width: 1.1150 inches minimum and 1.1250 inches maximum
Inner Ring Width: 21.00 millimeters nominal
Surface Finish: ground
Retainer Fabrication Method: pressed
Seal Quantity: 2
Bearing Seal Type: contact
Load Direction: radial
Bore Shape: straight
Internal Fit-Up Designation: tight
Standard Tolerance Designation: abec no.1
Special Features: inner ring rounded on both sides 0.060 in. radius; outer ring chamfered 0n inside 0.031 in. wide by 60 deg; outer ring rounded on outside 0.060 in. radius on side with part no. marking,0.375 in. radius on nonmarked side
Lubrication Material: grease
Lubrication Material Document And Classification: alvania 3,fscm 54527 mfr ref single material response
Material: rubber synthetic seal
Material: steel ball
Material: steel inner ring
Material: steel retainer
Style Designator: counterbored outer ring, non-separable

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
3110-00-231-9743	No Name Available	12/01/1971
3110-00-241-6745	No Name Available	01/02/1975

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
307SZZ4ABEC1	Annular Ball Bearing
504001	Annular Ball Bearing
8521A	Annular Ball Bearing
ALVAMIA 3	Annular Ball Bearing
ALVANIA 3	Annular Ball Bearing
D2-44343	Annular Ball Bearing
L101722	Annular Ball Bearing
MG307FF ALVANIA 3	Annular Ball Bearing
MG307FFH ALVANIA 3	Annular Ball Bearing
Z99607B	Annular Ball Bearing
ZMG607TY1Z8	Annular Ball Bearing

FAQs

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

What is the FSCG of the NSN 3110-00-953-4495?

The FSCG of the NSN 3110-00-953-4495 is 3110

Does the NSN 3110-00-953-4495 have a Schedule B code assigned?

Yes, the Schedule B code is 8482105028

Does NSN 3110-00-953-4495 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 3110-00-953-4495 contain precious materials?

Item does not contain precious metal.

Does NSN 3110-00-953-4495 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 3110-00-953-4495 was assigned to the Federal Catalog?

It was assigned 60 years ago, on Wed, May 4, 1966