P31721 Spherical Plain Bearing

Comprehensive specifications and application details for: P31721 Spherical Plain Bearing.

Summary

Explore detailed summary information for bearing: P31721. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number: P31721
Federal Supply Classification: 3120 Unmounted Plain Bearings
(NSN) National Stock Number: 3120-01-221-3078
Item Name Code: 13204
Federal Item Identification Guide: A045A0
Assigment Date: 11/26/1985

A detachable part in or on which a journal, gudgeon, pivot, or the like moves. It is used to carry a load and to reduce sliding friction. It does not employ rolling elements. It may be divided into two or more segments of 180 degrees (3.141 radians) or less. The item has a cylindrical bore and is basically spherical in its exterior design to allow for shaft misalignment. Excludes:bearing, plain, self-aligning.

0.3410 inches minimum and 0.3430 inches maximum overall length, 0.2495 inches minimum and 0.2500 inches maximum body inside diameter, chamfered all corners corner shape, ams 5387 assn std single material response overall material document and classification, 37.0 rockwell c minimum overall hardness rating

Datasheet

Below are the comprehensive technical specifications for bearing: 3120-01-221-3078 . Find dimensions, materials, tolerances, performance characteristics, etc.

Body Inside Diameter: 0.2495 inches minimum and 0.2500 inches maximum
Corner Shape: chamfered all corners
Hardness Rating: 37.0 rockwell c minimum overall
Overall Length: 0.3410 inches minimum and 0.3430 inches maximum
Material Document And Classification: ams 5387 assn std single material response overall
Material: cobalt comp 6 overall
Material: lubricant dry film lubrication
Special Features: lubricant e/m 967 per ps010,fscm 57606
Spherical Body Diameter: 0.4997 inches minimum and 0.5000 inches maximum
Style Designator: solid
Surface Finish: 16.0 microinches spherical surface
Surface Finish: 32.0 microinches inside diameter surface of body
Surface Finish: 63.0 microinches left end surface
Surface Finish: 63.0 microinches right end surface
Test Data Document: "81349-mil-i-6866 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.). and 57606-ps012 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.)."

Frequently Asked Questions

Find quick answers to common questions about bearing: P31721. Explore technical specifications, installation tips, maintenance guidelines, regulatory requirements, and troubleshooting advice.

What is the FSCG of the NSN 3120-01-221-3078?: The FSCG of the NSN 3120-01-221-3078 is 3120

Does the NSN 3120-01-221-3078 have a Schedule B code assigned?: Yes, the Schedule B code is 8482300040

Does NSN 3120-01-221-3078 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 3120-01-221-3078 contain precious materials?: Item does not contain precious metal.

Does NSN 3120-01-221-3078 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.