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FSG 31 Bearings Catalog

The U.S. Department of Defense created the National Stock Number system in order to create a uniform naming system for all the components that are sourced, stocked, and procured within the federal supply system. NSNs are 13 digit serial numbers that classify and describe an item. Within the NSN are the smaller classification numbers, Federal Supply Group, Federal Supply Class, country code, and National Item Identification Number. Typically in the format, XXXX-XX-XXXXXXX, the first two digits of the NSN are the Federal Supply Group. The following two digits are the Federal Supply Class. The FSG and the FSC can be referenced in the Department of Defense’s H2 handbook

Federal Supply Group 31: Bearings. We stock parts under FSG 31 and the following FSCs:

The number 3110 classifies bearings that are unmounted and antifriction like ball bearings, balls, races and roller bearings but exclude jewel bearings. Class 3120 stands for those bearings that ae generally one piece that position moving and retain and rotating parts. Examples of these are split bearings, sleeve bearings, and jewel bearings but exclude mounted bearings. The last class is 3130 which classify bearings mounted like pillow block units, flange units, flat box, and step box units.

The number 3110 classifies bearings that are unmounted and antifriction like ball bearings, balls, races and roller bearings but exclude jewel bearings. Class 3120 stands for those bearings that are generally one piece that position moving and retain and rotating parts. Examples of these are split bearings, sleeve bearings, and jewel bearings but exclude mounted bearings. The last class is 3130 which classify bearings mounted like pillow block units, flange units, flat box, and step box units.

We provide assistance for the purchasing of these parts 24 hours a day, 7 days a week, 365 days a year. We have an instant response for FSG 31 part requirements, so visit us at www.oneclickpurchasing.com or call one of our friendly sales staff at 412-212-0606.

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