FSG 20 Ship and Marine Equipment

Question 1

What is Federal Supply Group 20?

Accepted Answer

FSG 20 is the Federal Supply Group (formally known as NATO Supply Classification Group NSG 20) in the USA for supply items codified in the category of Ship and Marine Equipment.

Question 2

What is NATO Supply Classification Group 20?

Accepted Answer

NSG 20 is the NATO Supply Classification Group (also known as Federal Supply Group FSG 20 in the USA) for supply items codified in the category of Ship and Marine Equipment.

Question 3

Which Federal Supply Classes are in FSG 20?

Accepted Answer

FSG 20 contains the following Federal Supply Classes (FSC) (formally known as NATO Supply Classification Class [NSC]): 2010,2060,2040,2050,2090,2030,2020

Question 4

Which NATO Supply Classification Classes are in NSG 20?

Accepted Answer

NSG 20 contains the following NATO Supply Classification Classes (NSC) (also known as Federal Supply Class [FSC] in the USA): 2010,2060,2040,2050,2090,2030,2020

Question 5

When did the transition from Federal Supply Groups (FSG) to NATO Supply Groups (NSG) occur?

Accepted Answer

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.

Question 6

What is a Ship Propulsion Shaft?

Accepted Answer

A Ship Propulsion Shaft (SHAFT,PROPULSION,SHIP) is a shaft used to transmit to the propeller the torque generated by the main engine of a ship and also to transfer the propeller thrust to the thrust block.

Question 7

What is a Controllable Pitch Propellers Servo Control?

Accepted Answer

A Controllable Pitch Propellers Servo Control (CONTROL,SERVO,CONTROLLABLE PITCH PROPELLERS) is a control unit designed for use with marine controllable pitch propellers to position the valve side of the main servomotor valve.

Question 8

What is a Ship Propulsion Shaft Sleeve?

Accepted Answer

A Ship Propulsion Shaft Sleeve (SLEEVE,PROPULSION SHAFT,SHIP) is a tubular part installed over the periphery of ship's main propulsion shafts which are exposed to salt water, i.e., propeller shafts intermediate shafts and stern tube shafts, in order to provide a bearing surface in way of water-lubricated stern tube and strut bearings.

Question 9

What is an Inboard Propelling Unit?

Accepted Answer

An Inboard Propelling Unit (PROPELLING UNIT,INBOARD) is consists of a gasoline type, or a diesel type, marine engine(s) installed in a metal pontoon, direct connected with a propeller shaft, which extends through the after end of the pontoon, to a marine type propeller. Complete with steering mechanism and controls. Used as a propulsion and steering unit for pontoon barges, scows, and/or other transportation craft.

Question 10

What is an Outboard Propelling Unit?

Accepted Answer

An Outboard Propelling Unit (PROPELLING UNIT,OUTBOARD) is a heavy duty motive power device designed for permanent deck mounting upon heavy watercraft. The device consists essentially of an internal combustion power unit connected to an independently rotated and tilted outboard drive assembly. Excludes OUTBOARD MOTOR, GASOLINE.

Question 11

What is an Inboard Propelling Unit Skeg?

Accepted Answer

An Inboard Propelling Unit Skeg (SKEG,INBOARD PROPELLING UNIT) is a Y-shaped device constructed of metal and hinged to the pontoon hull and to the bottom of the rudder post of a PROPELLING UNIT, INBOARD to protect the propeller and rudder.

Question 12

What is a Ship Propeller Blade?

Accepted Answer

A Ship Propeller Blade (BLADE,PROPELLER,SHIP) is a hydrofoil, which is the thrust producing and major torque absorbing component of a ship propeller. It is provided with a suitable root section for assembly in a ship propeller hub. The hydrofoil section may be either helicoidal shaped radially disposed (variable pitch type), or straight faced (constant pitch type).

Question 13

What is a Ship Propeller Hub?

Accepted Answer

A Ship Propeller Hub (HUB,PROPELLER,SHIP) is a hub upon which ship propeller blades are installed to construct a PROPELLER, SHIP.

Question 14

What is a Fairwater Cap?

Accepted Answer

A Fairwater Cap (CAP,FAIRWATER) is an item, generally conical-shaped, used for streamline fairing the afterend of a ship propeller, a shaft bearing strut or shaft flanges. It diminishes the occurrence of eddies through on- and off- flowing water. The device can have a thread or screws for mounting.

Question 15

What is a Fuel Feeder Manifold?

Accepted Answer

A Fuel Feeder Manifold (MANIFOLD,FUEL FEEDER) is a pipelike item with one or two threaded pipe end inlets and one or more outlets which may be threaded for pipe connections.

Question 16

What is a Marine Propeller?

Accepted Answer

A Marine Propeller (PROPELLER,MARINE) is a propeller with two or more radial blades, designed to rotate and provide thrust for waterborne vessel or self-propelled underwater devices. It may be of solid or built-up construction; controllable, adjustable or fixed pitch design.

Question 17

What is a Marine Propeller Shaft Assembly?

Accepted Answer

A Marine Propeller Shaft Assembly (PROPELLER SHAFT ASSEMBLY,MARINE) is an item consisting essentially of the shaft, the shaft bearing, the propeller and the pertinent monitoring equipment. May also include the control facility for controllable-pitch propellers. It is used to transmit the torque produced by the propulsion system and to impart propulsion to the watercraft.

Question 18

What is a Marine Propeller Blade Parts Kit?

Accepted Answer

A Marine Propeller Blade Parts Kit (PARTS KIT,PROPELLER BLADE,MARINE) is a parts kit consisting of propeller blades and the pertinent seals and mounting elements.

Question 19

What is a Stave Shaped Bearing?

Accepted Answer

A Stave Shaped Bearing (BEARING,STAVE SHAPED) is a bonded synthetic rubber item used as a water lubricated bearing in stern-tubes or struts for supporting a rotating propulsion shaft for waterccraft.

Question 20

What is a Watercraft Variable Pitch Propeller Assembly Strap?

Accepted Answer

A Watercraft Variable Pitch Propeller Assembly Strap (STRAP,VARIABLE PITCH PROPELLER ASSEMBLY,WATERCRAFT) is a flat item made of metal and containing several bores. It is used for the connection of machine parts and the transmission of motion and power.

Question 21

What is a Watercraft Propeller Adjusting Rod?

Accepted Answer

A Watercraft Propeller Adjusting Rod (ADJUSTING ROD,PROPELLER,WATERCRAFT) is a rigid item made of metal and mounted in the propulsion shaft of a watercraft, the adjusting rod is used to alter the pitch of the propeller blades of an adjustable propeller.

Question 22

What is a Watercraft Propeller Adjusting Gear?

Accepted Answer

A Watercraft Propeller Adjusting Gear (ADJUSTING GEAR,PROPELLER,WATERCRAFT) is an item contained in the propeller shaft of a watercraft for setting the adjustable propeller to a desired pitch. The adjustment is effected pneumatically-hydraulically by means of an adjusting rod.

Question 23

What is a Coupling Housing?

Accepted Answer

A Coupling Housing (HOUSING,COUPLING) is an item fabricated from a single internally cored casting, or composed of two or more separate pieces and designed to support and protect the components of a coupling. Includes items having access hole(s) to facilitate machining and assembling of components. It may include the access hole cover.

Question 24

What is a Transmission Control Assembly?

Accepted Answer

A Transmission Control Assembly (CONTROL ASSEMBLY,TRANSMISSION) is an item that determines the mode of operation of a transmission. Excludes CONTROL(2), MOTOR TRANSMISSION.

Question 25

What is a Ship Propulsion Shaft Thrust Bearing Unit?

Accepted Answer

A Ship Propulsion Shaft Thrust Bearing Unit (BEARING UNIT,THRUST,PROPULSION SHAFT,SHIP) is a collection of items essentially consisting of a bearing housing, a thrust shaft, tilting shoes and bearing and lubricating oil cooling facilities together with the requisite fittings. It is used to transmit torque to the propeller.

Question 26

What is a Ship Propulsion Shaft Flange?

Accepted Answer

A Ship Propulsion Shaft Flange (FLANGE,PROPULSION SHAFT,SHIP) is a cylindrical item with or without threads. It may have holes for connecting bolts. The various propulsion shaft components are coupled to one another by means of this item.

Question 27

What is a Ship Shaft Log Parts Kit?

Accepted Answer

A Ship Shaft Log Parts Kit (PARTS KIT,SHAFT LOG,SHIP) is a parts kit essentially consisting of seal assembly and shaft log wear items such as sealing rings, hose springs and the like.

Question 28

What is a Ship Propeller Nut?

Accepted Answer

A Ship Propeller Nut (NUT,PROPELLER,SHIP) is an item of different shapes that may be internally threaded through a part of its length or through its entire length. It may have wrenching facilities such as flats, holes or slots. The item may also have bores in the periphery for locking purposes. It is used for mounting a propeller on a ship's propeller shaft.

Question 29

What is a Ship Lubricating Oil Cooling Cooling Coil?

Accepted Answer

A Ship Lubricating Oil Cooling Cooling Coil (COOLING COIL,LUBRICATING OIL COOLING,SHIP) is an item designed as a tube nest for heat transfer from lubricating or control oil. It may be an integral part of a lubricating oil cooler or directly mounted in an oil sump. Heat transfer is effected by conduction through the tube nest walls to a colder fluid.

Question 30

What is a Marine Rudder Propeller?

Accepted Answer

A Marine Rudder Propeller (PROPELLER,RUDDER,MARINE) is an item essentially consisting of an abovewater transmission, an underwater transmission, a fin and a propeller. A rudder propeller combines the functions of power transmission to the propeller with those of a reversing and reduction gear and steering of a watercraft.

Question 31

What is a Marine Propeller Bushing?

Accepted Answer

A Marine Propeller Bushing (BUSHING,PROPELLER,MARINE) is a cylindrical item used for mounting a propeller on the propulsion shaft or used as a guide bushing for a propeller pitch mechanism.

Question 32

What is a Propeller Pitch Facility Lubricating Oil Cooler?

Accepted Answer

A Propeller Pitch Facility Lubricating Oil Cooler (COOLER,LUBRICATING OIL,PROPELLER PITCH FACILITY) is an item designed for extracting heat from lubricating and control oil in the oil circuit of a propeller pitch system. Heat transfer is effected by conduction through the walls of the cooler to a colder fluid.

Question 33

What is a Ship Propulsion Shaft System?

Accepted Answer

A Ship Propulsion Shaft System (SHAFT SYSTEM,PROPULSION,SHIP) is a collection of items consisting of intermediate shafts, shaft bearings, a stern tube, bulkhead fittings and an anticorrosive system. The item is an integral part of a ship's power transmission system.

Question 34

What is a Ship Transmission System?

Accepted Answer

A Ship Transmission System (TRANSMISSION SYSTEM,SHIP) is a collection of items, essentially consisting of a transmission, oil pumps, oil coolers, oil separators, oil filters, a pipe system with fittings and the pertinent monitoring equipment. The item is designed for power transmission in a ship's propulsion system.

Question 35

What is a Stave Shaped Bearing Stave?

Accepted Answer

A Stave Shaped Bearing Stave (STAVE,BEARING,STAVE SHAPED) is an item made of laminated synthetic rubber or lignum vitae. It is part of a STAVE SET, BEARING, STAVE SHAPED with water lubricating a rotating drive shaft of watercraft in the shaft tube and the shaft dock.

Question 36

What is a Stave Shaped Bearing Stave Set?

Accepted Answer

A Stave Shaped Bearing Stave Set (STAVE SET,BEARING,STAVE SHAPED) is collection of STAVE, BEARING, STAVE SHAPED designed to be mounted on a BEARING, STAVE SHAPED.

Question 37

What is a Mechanical Transmission Repair Kit?

Accepted Answer

A Mechanical Transmission Repair Kit (REPAIR KIT,MECHANICAL TRANSMISSION) is a repair kit consisting of tools and parts as are required for the repair of worn or damaged parts of a TRANSMISSION, MECHANICAL.

Question 38

What is a Ship Propeller Parts Kit?

Accepted Answer

A Ship Propeller Parts Kit (PARTS KIT,PROPELLER,SHIP) is a group of parts not all having the same basic name. It is used for the replacement of worn or damaged parts and may include such items as propeller blades, seals, O-rings, slide rings and bearings.

Question 39

What is a Mechanical Transmission Housing Part?

Accepted Answer

A Mechanical Transmission Housing Part (HOUSING PART,TRANSMISSION,MECHANICAL) is a rigid item of different shapes which, together with at least one further housing part, forms a HOUSING (2), TRANSMISSION, MECHANICAL.

Question 40

What is a Mechanical Transmission Housing?

Accepted Answer

A Mechanical Transmission Housing (HOUSING,TRANSMISSION,MECHANICAL) is a usually multisectional housing which is designed to accommodate and hold in position the components of a TRANSMISSION, MECHANICAL.

Question 41

What is an Outboard Motor Tilt Assembly?

Accepted Answer

An Outboard Motor Tilt Assembly (TILT ASSEMBLY,OUTBOARD MOTOR) is a device composed of numerous items such as hydraulic cylinder(s), hose(s), bracket(s), electric motor and the like. Designed to attach to an outboard motor to raise and/or lower the propeller from/into the water.

Question 42

What is a Dual Master Control Head?

Accepted Answer

A Dual Master Control Head (CONTROL HEAD,DUAL MASTER) is a unit with solo rack and pinion control dual head. Unit has four ports with which control cables connect. Two controls will be routed to the port and starboard engine room transfer units, while the other two will be routed to the open bridge station starboard station. The connection between control head and control cable is accomplished by a simple quick disconnect fitting.

Question 43

What is a Dual Master And Lock Assembly Control Head?

Accepted Answer

A Dual Master And Lock Assembly Control Head (CONTROL HEAD,DUAL MASTER AND LOCK ASSEMBLY) is a unit consisting of CONTROL HEAD, DUAL MASTER and locking knob, which increases the system tension to compensate for throttle creep.

Question 44

What is a Dual Master And Lay Down Lever Assembly Control Head?

Accepted Answer

A Dual Master And Lay Down Lever Assembly Control Head (CONTROL HEAD,DUAL MASTER AND LAY DOWN LEVER ASSEMBLY) is a unit consisting of CONTROL HEAD, DUAL MASTER and a lay down hand lever, which permits hand levers to be inactive while other stations operate. The levers are inactive by pulling outward on handle hub and dropping the lever assembly forward.

Question 45

What is a Ship Propeller Hub Trunnion?

Accepted Answer

A Ship Propeller Hub Trunnion (TRUNNION,PROPELLER HUB,SHIP) is an item which is an integral part of a controllable pitch propeller hub.  It is attached internally to the crank disk and externally to the propeller blade and is used to pivot the propeller blades.

Question 46

What is a Hub Sliding Block?

Accepted Answer

A Hub Sliding Block (SLIDING BLOCK,HUB) is a square item used for the crank disc on the hub.  It enables the blades to rotate for variable pitch.

Question 47

What is a Guide Rod After Guide Block?

Accepted Answer

A Guide Rod After Guide Block (GUIDE BLOCK,AFTER,GUIDE ROD) is an internal part of controllable pitch propeller.It attaches to the after end of the guide rod and actuates the propeller blades via slide blocks and crank disc.

Question 48

What is a Guide Rod Forward Guide Block?

Accepted Answer

A Guide Rod Forward Guide Block (GUIDE BLOCK,FORWARD,GUIDE ROD) is an iternal part of a controllable pitch propeller.  It attaches to the forward end of the guide rod and actuates the propeller blades via slide blocks and crank disc.

Question 49

What is a Crank Ring?

Accepted Answer

A Crank Ring (RING,CRANK) is an item which is an internal part of a controllable pitch propeller hub assembly.  It is attached internally to the cross head assembly and externally to the propeller blade.  It is used to pivot the propeller blades

Question 50

What is a Ship Propeller Hub Assembly?

Accepted Answer

A Ship Propeller Hub Assembly (HUB ASSEMBLY,PROPELLER,SHIP) is an item which consists of the hub, cover, propeller shaft, and other related components.

Question 51

What is a Propeller Hub Guide Rod?

Accepted Answer

A Propeller Hub Guide Rod (GUIDE ROD,PROPELLER HUB) is an item which is an internal part of a controllable pitch propeller hub.  It is moved hydraulically in response to pitch commands and is attached to theguide blocks which in turn rotate the crank disks and propeller blades.

Question 52

What is a Propeller Hub Seal Ring?

Accepted Answer

A Propeller Hub Seal Ring (SEAL RING,HUB,PROPELLER) is a metallic circular item designed to be installed in the hub body/blade seal area.  It is grooved to accommodate o-rings.  It seals in the propeller hub operating oil while preventing outside contaminates from entering the system.

Question 53

What is a Shaft Seal Interlayer?

Accepted Answer

A Shaft Seal Interlayer (SEAL INTERLAYER,SHAFT) is an item fabricated from rubber or synthetic rubber, reinforced with cotton, designed to protect the stern shaft.

Question 54

What is a Rudder Tube And Shaft Assembly?

Accepted Answer

A Rudder Tube And Shaft Assembly (TUBE AND SHAFT ASSEMBLY,RUDDER) is a component of the rudder control system which consists of a tubular housing and rudder stock (shaft).  The item may also include hardware items such as bearings, bushings, machine keys, woodruff keys, and the like.

Question 55

What is a Skeg Extension?

Accepted Answer

A Skeg Extension (EXTENSION,SKEG) is an item which connects the SKEG, INBOARD PROPELLING UNIT to the tiller.

Question 56

What is a Fairwater Cap Nut Assembly?

Accepted Answer

A Fairwater Cap Nut Assembly (NUT ASSEMBLY,FAIRWATER CAP) is a combination of items such as pins, studs, hex nuts and fairwater nuts used to mount the CAP,FAIRWATER.

Question 57

What is a Bearing And Shaft Assembly?

Accepted Answer

A Bearing And Shaft Assembly is an item consisting of a shaft and assembled bearings together with bearing fasteners used to transmit power or motion through rotation.

Question 58

What is a Marine Mechanical Transmission?

Accepted Answer

A Marine Mechanical Transmission (TRANSMISSION,MECHANICAL,MARINE) is a marine device designed to increase, decrease, and/or reverse the rotation between the drive and driven shaft or shafts. It may or may not include the shifting control mechanism which changes ratios and/or direction of rotation. Excludes TRANSMISSION,CROSS-DRIVE and transmissions with controlled differentials.

Question 59

What is an Air Drive Manifold Assembly?

Accepted Answer

An Air Drive Manifold Assembly (MANIFOLD ASSEMBLY,AIR DRIVE) is an item consisting of a manifold and components designed to provide protection for a marine engine and its reverse reduction gear.  It provides a pause in neutral and a vented speed signal for each change of direction making clutch engagement always at an engine RPM near idle speed.

Question 60

What is an Air Drive Manifold Assembly Parts Kit?

Accepted Answer

An Air Drive Manifold Assembly Parts Kit (PARTS KIT,MANIFOLD ASSEMBLY,AIR DRIVE) is a parts kit used in the overhaul of a MANIFOLD ASSEMBLY, AIR DRIVE.  It may include such items as packing, spring(s), and the like.

Question 61

What is a Marine Propeller Protector?

Accepted Answer

A Marine Propeller Protector (PROTECTOR,PROPELLER,MARINE) is a rigid item designed to protect a PROPELLER, MARINE from possible damage and/or divers from injury.

Question 62

What is a Pneumatic Control Head Assembly?

Accepted Answer

A Pneumatic Control Head Assembly (CONTROL HEAD ASSEMBLY,PNEUMATIC) is a lever operated pneumatic control valve that provides two pilot air signals for direction control, and a variable pressure signal, proportional to lever position, for speed control.

Question 63

What is an Engine Control Unit?

Accepted Answer

An Engine Control Unit is a device that consists of push-pull cables operated by hand levers to control engine speed, clutch position and the like in a propulsion control system.

Question 64

What is a Speed Controller?

Accepted Answer

A Speed Controller (CONTROLLER,SPEED) is a mechanism used as a part of the main propulsion control which prevents throttle movement by increasing speed until the hydraulic clutch is fully engaged.

Ship and Marine Equipment

Federal Supply Group (FSG): 20

NATO Supply Classification Group (NSG): 20

NSN Format for Ship and Marine Equipment

Additional Information for Ship and Marine Equipment

Ship and Boat Propulsion Components

Commercial Fishing Equipment

Marine Hardware and Hull Items

Buoys

Miscellaneous Ship and Marine Equipment

Deck Machinery

Rigging and Rigging Gear

Frequently Asked Questions (FAQ) for Federal Supply Group 20

Top 20 Supply Items Included in Federal Supply Group 20

Stock Items for FSG 20 Page 5 of 287