What is Federal Supply Class 1240?

FSC 1240 is the Federal Supply Class (formally known as NATO Supply Classification Class NSC 1240) in the USA for supply items codified in the category of Optical Sighting and Ranging Equipment.

What is NATO Supply Classification Class 1240?

NSC 1240 is the NATO Supply Classification Class (also known as Federal Supply Class FSC 1240 in the USA) for supply items codified in the category of Optical Sighting and Ranging Equipment.

Which Federal Supply Group is FSC 1240 in?

FSC 1240 is in Federal Supply Group (FSG) 12 which contains Fire Control Equipment.

Which NATO Supply Classification Group is NSC 1240 in?

NSC 1240is in NATO Supply Classification Group (NSG) 12 which contains Fire Control Equipment.

What is a Periscope Subassembly?

A Periscope Subassembly is two or more different types of items having a common mounting or mounted on each other which together form a portion of a periscope subassembly but which in itself is not a complete functioning item and cannot be assigned a more definite item name.

What is an Elbow Telescope?

An Elbow Telescope (TELESCOPE,ELBOW) is a telescope whose line of vision is bent 90 degrees.

What is a Straight Telescope?

A Straight Telescope (TELESCOPE,STRAIGHT) is a telescope whose line of vision is 180 degrees from the eye.

A Binocular is a hand held optical instrument consisting of two telescopes on a common mounting adapted for stereoscopic use of both eyes of the user. The item may be designed for accommodation of prismatic devices.

What is an Optical Instrument Window?

An Optical Instrument Window (WINDOW,OPTICAL INSTRUMENT) is a color free item of transparent or translucent material, usually optical glass, having specific light dispersive and refractive properties. This item must have two plane-parallel surfaces and is designed for use in an optical instrument to provide a barrier to foreign matter and/or permit light transmission in or to the optical system.

What is a Telescopic Instrument Light Filter?

A Telescopic Instrument Light Filter (FILTER,LIGHT,TELESCOPIC INSTRUMENT) is an item having two plane-parallel surfaces and used in the telescopic system of an optical instrument to modify the density or spectral intensity of light by absorption. Several filters having varied characteristics are usually mounted in such a manner that any selected filter may be moved in or out of the optical axis as light conditions warrant. Excludes WINDOW, OPTICAL INSTRUMENT.

What is an Optical Element Cell?

An Optical Element Cell (CELL,OPTICAL ELEMENT) is a cylindrical item specifically designed to hold a lens, reticle, or window in an optical system. Includes eccentric cells and/or rings designed to be rotated within the instrument to shift an optical element to a prescribed position.

What is a Fire Control Instrument Level?

A Fire Control Instrument Level (LEVEL,FIRE CONTROL INSTRUMENT) is a device which utilizes a cylindrical or circular VIAL, LEVEL. It is used for leveling, adjusting and setting angles for fire control instruments of which it is an integral part.

What is a Telescope Mount?

A Telescope Mount (MOUNT,TELESCOPE) is a mechanical device designed to support and/or position a telescope. It may include one or more of the following; cross leveling device, means of boresighting a gun, azimuth and/or elevation, adjusting mechanism, and accommodations for attaching a LIGHT, INSTRUMENT.

What is an Optical Instrument Eyeshield?

An Optical Instrument Eyeshield (EYESHIELD,OPTICAL INSTRUMENT) is a resilient rubber item, designed to be attached to the viewing aperture of an optical instrument, to maintain proper eye distance and to protect the eye(s) of the observer from stray light, wind, and/or injury due to shock of gun fire or similar disturbances. Excludes VISOR, PERISCOPE.

What is an Optical Instrument Eyepiece Assembly?

An Optical Instrument Eyepiece Assembly (EYEPIECE ASSEMBLY,OPTICAL INSTRUMENT) is an optical system consisting of two or more lenses secured within a cylindrical sleeve. It is the component of an optical instrument nearest the eye of the observer when sighting. The distance between lenses is maintained by an optical element spacer. It usually has focusing facilities and may include a reticle, filter, and/or diopter scale.

What is an Optical Instrument Cell Assembly?

An Optical Instrument Cell Assembly (CELL ASSEMBLY,OPTICAL INSTRUMENT) is an item consisting of a CELL, OPTICAL ELEMENT in which is secured one or more optical elements, such as lenses, reticles, filters, windows, and the like. May include retaining rings, spacers, and/or separators. For items with focusing facilities and/or a diopter scale, see EYEPIECE ASSEMBLY, OPTICAL INSTRUMENT.

What is an Optical Element Retainer?

An Optical Element Retainer (RETAINER,OPTICAL ELEMENT) is a cylindrical, externally threaded item having a centrally located hole specifically designed to retain by means of either a raised box (shoulder), or counterbore, countersink, or a similar shaped recess, an optical element such as a lens, reticle, cell, and the like, in optical assemblies. It must have drilled holes or slots to facilitate assembly and disassembly. For items which house the optical element(s), and form the internal or central portions of an optical system, see CELL, OPTICAL ELEMENT. Excludes RING, EXTERNALLY THREADED.

What is an Optical Element Retaining Ring?

An Optical Element Retaining Ring (RING,RETAINING,OPTICAL ELEMENT) is a cylindrical item having an internally flanged diameter designed to retain a lens or window in the objective end, or a diopter scale at the viewing end of an optical instrument. It may have one or more of the following characteristics: internal thread or machined for a press fit, method of securing, and/or knurled periphery. For externally threaded items, see RETAINER, OPTICAL ELEMENT. Excludes CELL, OPTICAL ELEMENT; NUT, PLAIN KNURLED; NUT, PLAIN ROUND; and RING, RETAINING.

What is a Sight Unit?

A Sight Unit is a compact sighting device composed of an elbow or panoramic telescope, mount, and/or adapter, usually used for pointing a weapon for direct or indirect fire. It may be attached to, or used in conjunction with, a weapon, rocket launcher, or the like. Excludes SIGHT, INFINITY and SPOTTING INSTRUMENT, OPTICAL.

What is an Optical Instrument Reticle Assembly?

An Optical Instrument Reticle Assembly (RETICLE ASSEMBLY,OPTICAL INSTRUMENT) is an optical element consisting of a polished optical glass disk to which is bonded a RETICLE, OPTICAL INSTRUMENT and a PRISM, OPTICAL INSTRUMENT. A right-hand and a left-hand assembly are used in an optical system to provide three dimensional vision of an object or target.

What is a Laser Range Finder?

A Laser Range Finder (RANGE FINDER,LASER) is an instrument used to determine the distance of a target from the observer. It comprises a laser transmitter and receiver system. It may include ancillary equipment to determine azimuth and elevation angles.

What is an Optical Instrument Case?

An Optical Instrument Case (CASE,OPTICAL INSTRUMENT) is a portable case which may include clamps, spring clips, brackets or the like, to secure the instrument, accessories and/or components. It may include padding to protect the instrument against shock and vibration. Excludes CASE (2), SURVEYING INSTRUMENT.

What is an Armored Vehicle Periscope?

An Armored Vehicle Periscope (PERISCOPE,ARMORED VEHICLE) is a rectangular or cylindrical periscope, usually positioned in a holder, or mount within an armored vehicle. It is used to observe terrain, near and distant targets, and the like. It may also be linked to gun-training mechanisms for integration of movement for fire control purposes.

What is an Optical Instrument Wiper Assembly?

An Optical Instrument Wiper Assembly (WIPER ASSEMBLY,OPTICAL INSTRUMENT) is an item fitted to the objective end of an optical instrument and designed for cleaning the lens and/or window during operations.

What is a Sight Mount?

A Sight Mount (MOUNT,SIGHT) is a mechanical device designed to support and/or position a sight. It may include one or more of the following: cross leveling device, means of boresighting a gun, azimuth and/or elevation, adjusting mechanism. Excludes any self-contained mounting fixture which is an integral part of a sight. See also MOUNT, TELESCOPE.

Optical Sighting and Ranging Equipment - United Kingdom (UK)

Federal Supply Class (FSC): 1240

NATO Supply Classification Class (NSC): 1240

Federal Supply Group (FSG): 12 Fire Control Equipment

NATO Supply Classification Group (NSG): 12 Fire Control Equipment

Items Managed by United Kingdom (UK) - NCB is 99

Page 9 of 25

NSN Format for Optical Sighting and Ranging Equipment
Codified by United Kingdom

12	40	99	XXX
Group FSG	Class	NCB	Identifier
FSC Federal Supply Class		NIIN
NSN

NATO Supply Class 1240 is a classification for Optical Sighting And Ranging Equipment. It falls under NATO Supply Group 12, which is specifically for Fire Control Equipment.

Optical Sighting And Ranging Equipment refers to devices that are used for accurately aiming and measuring distances in various applications, such as military operations, surveying, and target acquisition. This equipment typically utilizes optical technology, such as telescopes, rangefinders, and laser designators, to provide precise targeting and range estimation capabilities.

In the context of NATO Supply Group 12, which is dedicated to Fire Control Equipment, the Optical Sighting And Ranging Equipment in Class 1240 plays a crucial role in enhancing the accuracy and effectiveness of fire control systems. These devices are often integrated into artillery, naval, and air defense systems to assist in target acquisition, tracking, and engagement.

By utilizing Optical Sighting And Ranging Equipment, military forces can improve their situational awareness, increase the probability of hitting targets, and minimize collateral damage. These devices are designed to withstand harsh environmental conditions and provide reliable performance in combat scenarios.

Overall, NATO Supply Class 1240 for Optical Sighting And Ranging Equipment in NATO Supply Group 12 for Fire Control Equipment highlights the importance of precise targeting and range estimation capabilities in military operations, contributing to the overall effectiveness and efficiency of fire control systems.

FSC 1240 Optical Sighting and Ranging Equipment - United Kingdom (UK)

Includes Periscopes for Submarines; Range and Height Finders; Telescopic Sights; Optical Instruments Integrated with Fire Control Equipment.

Note-Fire control assemblies, subassemblies, and components are classified: a. In appropriate classes of this group when: (1) Designed for multiple applications to different kinds of fire control equipment. (2) Modified for use with guided missile remote control systems. (3) Designed specifically for shipborne guided missile remote control systems. (4) Radar equipment, designed specifically for fire control systems. (5) Both day and night viewing characteristics are incorporated into an integral unit. b. In Class 1270 or 1280, when designed specifically for aircraft gunnery or aircraft bombing fire control, respectively. c. In Class 1430, when designed specifically for guided missile remote control systems, except shipboard type. d. In appropriate classes of Group 58, when designed for multiple applications to both fire control and communication equipment. e. In appropriate classes of Group 58 when designed for night vision.

Frequently Asked Questions(FAQ) for Federal Supply Class 1240

Supply Items Included in Federal Supply Class 1240

Stock Items From Supply Class 1240 Page 9 of 25