MS27641-20

View detailed technical data, stock status, and sourcing information for: MS27641-20

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MS27641-20
Federal Supply Group
Bearings
Federal Supply Classification
3110 Unmounted Antifriction Bearings
National Stock Number
3110-00-027-8143
Item Name Code
00041
Assigment Date
01/13/1972 (54 years ago)

A cylindrical item in which the inner or outer ring turns upon row(s) of hardened ball, bearing which roll on a raceway, thus minimizing friction. These items are characterized by their noncorrosive qualities, lightness of weight, inch dimensions rather than metric, inner rings generally projecting beyond the faces of the outer ring, or a very narrow width inner ring having an outside diameter slightly larger than the bore diameter. Designed primarily for use in aircraft assemblies, such as control systems and surfaces of aircraft. Excludes:bearing,ball,annular.

0.4380 inches nominal outer ring width, 1.2500 inches nominal bore diameter, 0.5000 inches nominal inner ring width, 2 seal quantity, 2.2500 inches nominal overall outside 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
1.2500 inches nominal
Overall Outside Diameter
2.2500 inches nominal
Outer Ring Width
0.4380 inches nominal
Inner Ring Width
0.5000 inches nominal
Seal Quantity
2
Bearing Seal Type
contact
Load Direction
radial
Standard Tolerance Designation
afbma std tolerance for airframe ball bearings
Special Features
80 pct.full of mil-g-81322,internal radial clearance 0.0004- 0.0010 in.,heat treat rings and balls to rockwell c 60 to 66 and stabilized for operation at 250 deg. f,radial and @lateral eccentricity inner ring 0.0010 in. outer ring 0.0016 in.
Lubrication Material Document And Classification
mil-g-81322 mil spec single material response
Material
plastic polytetrafluoroethylene seal
Material
steel corrosion resisting retainer
Material
steel comp e51100 or steel comp e52100 ball
Material
steel comp e52100 inner ring
Material
steel comp e52100 outer ring
Material Document And Classification
66 fed std all material responses ball
Material Document And Classification
66 fed std single material response inner ring
Material Document And Classification
66 fed std single material response outer ring
Material Document And Classification
ams 3652 assn std single material response or ams 3666 assn std single material response seal
Surface Treatment
cadmium exposed surfaces as mounted
Surface Treatment Document And Classification
qq-p-416,ty 1,cl 2 fed spec single treatment response exposed surfaces as mounted
Style Designator
single row inner ring extended both sides

Replaces National Stock Numbers

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

NSN Name Date
3110-00-142-4297 No Name Available 09/01/1983

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
AS27641-20 Airframe Ball Bearing
AT25-101D Airframe Ball Bearing
KP20AFS464 Airframe Ball Bearing
MS27641-20 Airframe Ball Bearing
SAE AS27641 Airframe Ball Bearing
SAE AS27641-20 Airframe Ball Bearing

FAQs

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

What is the FSCG of the NSN 3110-00-027-8143?
The FSCG of the NSN 3110-00-027-8143 is 3110
Does the NSN 3110-00-027-8143 have a Schedule B code assigned?
Yes, the Schedule B code is 8482105068
Does NSN 3110-00-027-8143 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 3110-00-027-8143 contain precious materials?
Precious metal content is unknown
Does NSN 3110-00-027-8143 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 3110-00-027-8143 was assigned to the Federal Catalog?
It was assigned 54 years ago, on Thu, Jan 13, 1972

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Pricing

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ITAR Registered

In Stock

This item is currently available and ready for prompt shipment. Units may be offered in various conditions — new, surplus, or refurbished — and stored at verified global facilities. Request a quote to confirm current stock and delivery time.

New Material 162
New Surplus 35
As Removed 1
Total 198
Availability of this item was last updated on: 11/12/2025 02:11 PM EST. Stock levels and pricing are subject to change.

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