4M278

View detailed technical data, stock status, and sourcing information for: 4M278

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4M278
Federal Supply Group
Bearings
Federal Supply Classification
3110 Unmounted Antifriction Bearings
National Stock Number
3110-01-220-0265
Item Name Code
00040
Assigment Date
11/06/1985 (40 years ago)

A tubular shaped item with or without flange(s) designed to reduce friction and carry a kinetic load on the surface(s) parallel to the axis of the bore. It must have a visible or detectable means of lubrication or be self-lubricated. The over all length must exceed 25 percent of the outside diameter or the shortest distance between peripheral flats of the body, except for straight tubular (without flange or shoulder) items having a bearing surface(s) parallel to the axis of the bore only. Includes items which are divided into two or more segments which include 180 degrees (3.141 radians) or less of the bearing periphery. See also bushing, sleeve; spacer, sleeve; and washer (as modified). Excludes:pin, hollow.

3a thread class, right-hand thread direction, 0.5000 inches nominal thread length, 1.6250 inches nominal overall length, 1.1240 inches minimum and 1.1250 inches maximum 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.

Thread Class
3a
Thread Direction
right-hand
Thread Length
0.5000 inches nominal
Overall Length
1.6250 inches nominal
Overall Outside Diameter
1.1240 inches minimum and 1.1250 inches maximum
Stud Diameter
0.4375 inches minimum and 0.4385 inches maximum
Outer Ring Width
0.6200 inches minimum and 0.6250 inches maximum
Stud Length
1.0000 inches nominal
Seal Quantity
2
Bearing Seal Type
contact
Alignment Type
rigid
Cam End Diameter
0.6250 inches nominal
Features Provided
lubrication hole and lubrication groove
Thread Quantity Per Inch
20
Nominal Thread Size
0.438 inches
Eccentricity
0.0300 inches nominal
Special Features
internal hex wrenching flats,0.250 in
Material
rubber polyester urethane class au seal
Material
steel end plate
Material
steel outer ring
Material
steel roller
Material
steel stud
Material Document And Classification
hytrel,fscm 60380 mfr ref single material response seal
Surface Treatment
cadmium exposed surfaces of stud and washer as mounted
Surface Treatment
chromium outer ring outside diameter
Surface Treatment
chromium outer ring sides
Style Designator
cam follower, adjustable
Thread Series Designator
unf

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
1M2788E18 Needle Bearing Cam Follower
4M278 Needle Bearing Cam Follower
4M278BE18 Needle Bearing Cam Follower
CRSBE18CP Needle Bearing Cam Follower

FAQs

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

What is the FSCG of the NSN 3110-01-220-0265?
The FSCG of the NSN 3110-01-220-0265 is 3110
Does the NSN 3110-01-220-0265 have a Schedule B code assigned?
Yes, the Schedule B code is 8482400000
Does NSN 3110-01-220-0265 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 3110-01-220-0265 contain precious materials?
Item does not contain precious metal.
Does NSN 3110-01-220-0265 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 3110-01-220-0265 was assigned to the Federal Catalog?
It was assigned 40 years ago, on Wed, Nov 6, 1985

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