Bearings
Federal Supply Group (FSG): 31
NATO Supply Classification Group (NSG): 31
Item Hits: 589923 - Page 2 of 1180
All bearings, including specially designed, lubricated, and/or selected, are to be classified in the appropriate classes of this group. Bearings are parts that supports another part which rotates, slides, or oscillates in or on it.
Additional Information for Bearings
The NATO Supply Group (historically known as Federal Supply Group) 31 for Bearings groups together the NATO Stock Numbers (historically known as National Stock Numbers) for mounted bearings, plain un-mounted bearings and anti-friction un-mounted bearings. Typical bearing types include ball bearings, roller bearings, bearing sleeves, thrust bearings, pillow-block bearings and rod-end bearings. NSNs for bearings are extensive with over 500,000 distinct physical types codified by NATO. The NSNs are distinguished by their physical characteristics such as size, material, tapered, parallel, slide, sleeve, roller and ball. In addition to the physical characteristics, quality standards can determine the difference between NSNs, bearings can be commercial grade, marine standard, national aerospace standard (NAS Bearings), Military Standard (MS Bearings), Aerospace Standard (AS Bearings), International Organization for Standardization (ISO Bearings) and American National Standards Institute (ANSI Bearings) to name but a few.
Frequently Asked Questions (FAQ) for Federal Supply Group 31
- What is Federal Supply Group 31?
- FSG 31 is the Federal Supply Group (formally known as NATO Supply Classification Group NSG 31) in the USA for supply items codified in the category of Bearings.
- What is NATO Supply Classification Group 31?
- NSG 31 is the NATO Supply Classification Group (also known as Federal Supply Group FSG 31 in the USA) for supply items codified in the category of Bearings.
- Which Federal Supply Classes are in FSG 31?
- FSG 31 contains the following Federal Supply Classes (FSC) (formally known as NATO Supply Classification Class [NSC]): 3120, 3130, 3110
- Which NATO Supply Classification Classes are in NSG 31?
- NSG 31 contains the following NATO Supply Classification Classes (NSC) (also known as Federal Supply Class [FSC] in the USA): 3120, 3130, 3110
- When did the transition from Federal Supply Groups (FSG) to NATO Supply Groups (NSG) occur?
- The transition from Federal Supply Groups (FSG) to NATO Supply Groups (NSG) occurred on January 1, 1997. This change was implemented to align the classification and coding systems used by NATO member countries for military supplies and equipment. Federal Supply Groups (FSG) are now obsolete.
Top 20 Supply Items Included in Federal Supply Group 31
- What is a Sleeve Bearing? 60393 Items
- A Sleeve Bearing (BEARING,SLEEVE) is 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.
- What is a Sleeve Bushing? 91302 Items
- A Sleeve Bushing (BUSHING,SLEEVE) is 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.
- What is a Self-Aligning Plain Bearing? 5091 Items
- A Self-Aligning Plain Bearing (BEARING,PLAIN,SELF-ALIGNING) is a detachable assembly 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. The item consists of a bored precision ground ball (or spherical plain bearing) around which an outer ring is fitted. The assembly may be either separable or nonseparable. Excludes BEARING, PLAIN, ROD END and BEARING, PLAIN, SPHERICAL.
- What is a Rod End Plain Bearing? 6654 Items
- A Rod End Plain Bearing (BEARING,PLAIN,ROD END) is a detachable assembly 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. The outer member of the assembly is modified to provide a shank. The inner member may be either a plain spherical bearing or a sleeve bearing. Excludes BEARING, PLAIN, SPHERICAL and BEARING, PLAIN, SELF-ALIGNING.
- What is a Thrust Washer Bearing? 16465 Items
- A Thrust Washer Bearing (BEARING,WASHER,THRUST) is an item of any peripheral shape usually having one flat or spherical surface and a centrally located hole. It is designed for applications involving moving (kinetic) loads. Except for items fabricated from bearing quality synthetic (plastic) or composed of multilayer material, one bearing surface must either have a specific surface finish designation of 32 microinch (0.8 micrometre) or less, arithmetical average (aa) (arithmetic mean deviation) or one of the following conditions: be lapped or ground; have visible or detectable means of lubrication; grooves, indentations; or self-lubrication. The thickness must not exceed 25 percent of the outside diameter of the shortest distance between peripheral flats (when thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance). Excludes straight, tubular (without flange) items having a bearing surface(s) parallel to the axis of the bore only. See also WASHER, FLAT and SPACER, SLEEVE.
- What is a Sleeve Bearing Half Set? 3792 Items
- A Sleeve Bearing Half Set (BEARING HALF SET,SLEEVE) is two or more identical or different sizes or types of BEARING HALF, SLEEVE packaged or grouped together for single issue as a unit, for replacement of worn and/or damaged bearings. See BEARING HALF, SLEEVE. Excludes BEARING SET, SLEEVE.
- What is a Sleeve Bearing Half? 4073 Items
- A Sleeve Bearing Half (BEARING HALF,SLEEVE) is a half of a two-piece split type BEARING, SLEEVE.
- What is a Linear-Rotary Motion Roller? 4481 Items
- A Linear-Rotary Motion Roller (ROLLER,LINEAR-ROTARY MOTION) is a cylindrical body having a centrally located hole to accommodate a pin or shaft for attachment to a push rod guide, yoke, rocker arm, turntable, or rail. The item provides a rolling contact with the face of a valve stem, or the lobes of a cam ring or camshaft on engines, fuel injection pumps, latches, turntables, parallel bearing surfaces requiring a roller support, and the like. Excludes BEARING, ROLLER, CYLINDRICAL; ROLLER, ELECTRICAL SWITCH; and friction bearings. See also CAM FOLLOWER, NEEDLE BEARING.
- What is a Ball Bearing Unit? 2964 Items
- A Ball Bearing Unit (BEARING UNIT,BALL) is an assembled unit, composed of a housing incorporating a single or multiple row ball bearing(s), designed to meet various or specific conditions of mounting.
- What is a Bearing Unit Housing? 9262 Items
- A Bearing Unit Housing (HOUSING,BEARING UNIT) is a single or multiple piece item without ball, plain or roller bearing(s). It is designed to meet various or specific conditions of mounting. For items with bearings, see BEARING UNIT, BALL; BEARING UNIT, PLAIN; and BEARING UNIT, ROLLER.
- What is an Annular Ball Bearing? 48679 Items
- An Annular Ball Bearing (BEARING,BALL,ANNULAR) is a cylindrical device in which the inner or outer ring turns upon a single or double row of hardened balls which roll easily between the two rings, thus minimizing friction. For items with faces specially ground for duplex mounting see BEARING, BALL, DUPLEX. Excludes BEARING, BALL, AIRFRAME.
- What is a Cylindrical Roller Bearing? 9277 Items
- A Cylindrical Roller Bearing (BEARING,ROLLER,CYLINDRICAL) is a nonadjustable roller bearing consisting of a single or multiple-row of hardened cylindrical rollers and a retainer used with or without inner or oute r rings. Excludes BEARING, ROLLER, AIRFRAME.
- What is a Thrust Ball Bearing? 3036 Items
- A Thrust Ball Bearing (BEARING,BALL,THRUST) is an antifriction bearing having a ball rolling element, designed to resist axial thrust, or to support an axial load. Excludes BEARING, BALL, PIVOT.
- What is a Tapered Roller Bearing? 7189 Items
- A Tapered Roller Bearing (BEARING,ROLLER,TAPERED) is a cylindrical device in which the inner cone or outer cup turns upon a single or double row of tapered hardened rollers which roll easily in a race, thus minimizing friction and designed to carry a radial load and capable of sustaining axial thrust. Excludes BEARING, ROLLER, THRUST.
- What is a Bearing Ball? 6625 Items
- A Bearing Ball (BALL,BEARING) is a homogenous spherical body, a series of which provides the rolling elements in a BEARING, BALL (as modified). The item is designed primarily to alleviate friction. It may have other usages such as the checking component in a ball-type check valve. Excludes BALL, CHECK; BALL, VALVE, PORTED.
- What is a Needle Roller Bearing? 6587 Items
- A Needle Roller Bearing (BEARING,ROLLER,NEEDLE) is a single or multiple-row antifriction bearing used with or without inner or outer races characterized by relatively small size rollers usually not ranging above 0.250 inch (6.35mm) diameter and generally longer in length in relation to diameter.
- What is a Bearing Retaining Plate? 5284 Items
- A Bearing Retaining Plate (PLATE,RETAINING,BEARING) is a comparatively flat rigid item, with or without a centrally located aperture, designed to hold an annular bearing or a sleeve bearing in a fitted inclosure. It must have drilled and/or tapped holes for mounting purposes. Excludes END BELL, ELECTRICAL ROTATING EQUIPMENT.