4B21MS4-016

Comprehensive specifications and application details for: 4B21MS4-016 Sleeve Bushing.

Summary

Explore detailed summary information for bearing: 4B21MS4-016. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number
4B21MS4-016
Federal Supply Classification
3120 Unmounted Plain Bearings
(NSN) National Stock Number
3120-00-288-4618
Item Name Code
13206
Federal Item Identification Guide
A045A0
Assigment Date
01/01/1963

A tubular shaped unthreaded item with or without a flange at one end designed to be inserted into a hole to reduce the inside diameter of the hole and to protect the surrounding body structure from damage resulting from stress, strain, and/or vibration. The overall length must exceed 25 percent of the outside diameter or the shortest distance between peripheral flats of the body. Includes items which are divided into two or more segments which includes 180 degrees (3.141 radians) or less of the bearing periphery. For items made of rubber, see bushing, nonmetallic. See also bearing, sleeve; bushing, tapered; spacer, sleeve; insulator, bushing; and bushing, electrical conductor. Excludes:bushing, drill, jig.

0.4950 inches minimum and 0.5000 inches maximum overall length, 0.2495 inches minimum and 0.2505 inches maximum body inside diameter, square all corners corner shape, 0.3730 inches minimum and 0.3735 inches maximum body outside diameter, mil-t-6736 mil spec single material response overall material document and classification

Datasheet

Below are the comprehensive technical specifications for bearing: 3120-00-288-4618 . 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
0.4950 inches minimum and 0.5000 inches maximum
Material Document And Classification
mil-t-6736 mil spec single material response overall
Material
steel comp 4130 overall
Style Designator
solid, plain, no outside flanges
Surface Treatment
chromium outside diameter surface of body

Replaces

The NSN 3120-00-288-4618 is used in place of the following discontinued or alternate items:

NSN Name Date
3120-00-288-4999 No Name Available 03/01/2008

Frequently Asked Questions

Find quick answers to common questions about bearing: 4B21MS4-016. Explore technical specifications, installation tips, maintenance guidelines, regulatory requirements, and troubleshooting advice.

What is the FSCG of the NSN 3120-00-288-4618?
The FSCG of the NSN 3120-00-288-4618 is 3120
Does the NSN 3120-00-288-4618 have a Schedule B code assigned?
Yes, the Schedule B code is 8482997060
Does NSN 3120-00-288-4618 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 3120-00-288-4618 contain precious materials?
Item does not contain precious metal.
Does NSN 3120-00-288-4618 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 3120-00-288-4618 was assigned to the Federal Catalog?
It was assigned 62 years ago, on Tue, Jan 1, 1963

Price & Availability

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