4B21S4-030

Comprehensive specifications and application details for: 4B21S4-030 Sleeve Bearing.

Summary

Explore detailed summary information for bearing: 4B21S4-030. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number
4B21S4-030
Federal Supply Classification
3120 Unmounted Plain Bearings
(NSN) National Stock Number
3120-00-288-4895
Item Name Code
13205
Federal Item Identification Guide
A045A0
Assigment Date
01/01/1963

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.

mil-s-6736 mil spec 1st material response or ams 6371 assn std 1st material response or ams 6372 assn std 2nd material response overall material document and classification, 0.3730 inches minimum and 0.3735 inches maximum body outside diameter, 0.9325 inches minimum and 0.9375 inches maximum overall length, square all corners corner shape, 0.2495 inches minimum and 0.2505 inches maximum body inside diameter

Datasheet

Below are the comprehensive technical specifications for bearing: 3120-00-288-4895 . Find dimensions, materials, tolerances, performance characteristics, etc.

Body Inside Diameter
0.2495 inches minimum and 0.2505 inches maximum
Body Outside Diameter
0.3730 inches minimum and 0.3735 inches maximum
Corner Shape
square all corners
Overall Length
0.9325 inches minimum and 0.9375 inches maximum
Material Document And Classification
mil-s-6736 mil spec 1st material response or ams 6371 assn std 1st material response or ams 6372 assn std 2nd material response overall
Material
steel comp 4130 or steel comp 4135 overall
Style Designator
solid, plain, no outside flanges
Surface Finish
125.0 microinches left end surface of body
Surface Finish
125.0 microinches right end surface of body
Surface Finish
16.0 microinches outside diameter surface of body
Surface Finish
250.0 microinches inside diameter surface of body
Surface Treatment Document And Classification
qq-c-320,cl 2 fed spec single treatment response outside diameter surface of body
Surface Treatment
chromium overall

Frequently Asked Questions

Find quick answers to common questions about bearing: 4B21S4-030. Explore technical specifications, installation tips, maintenance guidelines, regulatory requirements, and troubleshooting advice.

What is the FSCG of the NSN 3120-00-288-4895?
The FSCG of the NSN 3120-00-288-4895 is 3120
Does the NSN 3120-00-288-4895 have a Schedule B code assigned?
Yes, the Schedule B code is 8482997090
Does NSN 3120-00-288-4895 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 3120-00-288-4895 contain precious materials?
Precious metal content is unknown
Does NSN 3120-00-288-4895 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 3120-00-288-4895 was assigned to the Federal Catalog?
It was assigned 62 years ago, on Tue, Jan 1, 1963

Price & Availability

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