What is Federal Supply Class 5305?

FSC 5305 is the Federal Supply Class (formally known as NATO Supply Classification Class NSC 5305) in the USA for supply items codified in the category of Screws.

What is NATO Supply Classification Class 5305?

NSC 5305 is the NATO Supply Classification Class (also known as Federal Supply Class FSC 5305 in the USA) for supply items codified in the category of Screws.

Which Federal Supply Group is FSC 5305 in?

FSC 5305 is in Federal Supply Group (FSG) 53 which contains Hardware and Abrasives.

Which NATO Supply Classification Group is NSC 5305 in?

NSC 5305is in NATO Supply Classification Group (NSG) 53 which contains Hardware and Abrasives.

What is an Externally Relieved Body Screw?

An Externally Relieved Body Screw (SCREW,EXTERNALLY RELIEVED BODY) is an externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercut for thread relief). It is No. 0 (0.060 IN.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below No. 10 (0.190 IN.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also BOLT, EXTERNALLY RELIEVED BODY and BOLT, INTERNAL WRENCHING.

What is a Wood Screw?

A Wood Screw (SCREW,WOOD) is an unhardened externally threaded fastener whose continuous thread extends from a gimlet point for a distance of approximately two-thirds of the length of the screw and which is designed to be driven with an inserted driver.

What is a Machine Screw?

A Machine Screw (SCREW,MACHINE) is an externally threaded fastener whose threaded portion is of one nominal diameter, No 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below No. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; and SCREW, ASSEMBLED WASHER. See also, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; and SCREW, CAP SOCKET HEAD.

What is an Assembled Washer Screw?

An Assembled Washer Screw (SCREW,ASSEMBLED WASHER) is a SCREW, (as modified) to which has been assembled one or more nonremovable washer(s).

A Setscrew is an externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. A locking feature may be incorporated in the design of the head or threads.

What is a Thumbscrew?

A Thumbscrew is an externally threaded fastener whose threaded portion is of one nominal diameter. It may have an unthreaded portion with a diameter less than, equal to, or greater than the diameter of the threaded portion. It has either a vertically flattened, circular knurled, or wing type head, all of which are designed for rotation by the thumb and fingers. For items having wrenching facilities such as socket recess, multiple spline or slot heads, use SCREW (as modified) or BOLT (as modified).

What is an Eye Screw?

An Eye Screw (SCREW,EYE) is a fastening device with one end formed in the shape of an eye and the other end threaded with a lag or wood screw type of thread.

What is a Drive Screw?

A Drive Screw (SCREW,DRIVE) is a hardened cylindrical fastener with multiple spiral flutes on its shank. It also has an end smaller in diameter than the outside diameter of the spiral flutes, which acts as a pilot when driven into a drilled hole.

What is a Screw Assortment?

A Screw Assortment is two or more different sizes and/or types of screws grouped together in a single package.

What is a Socket Head Cap Screw?

A Socket Head Cap Screw (SCREW,CAP,SOCKET HEAD) is an externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.

What is a Hexagon Head Cap Screw?

A Hexagon Head Cap Screw (SCREW,CAP,HEXAGON HEAD) is an externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. Excludes BOLT,MACHINE; BOLT,EXTERNALLY RELIEVED BODY; BOLT,INTERNAL WRENCHING; and SCREW,CAP,SOCKET HEAD.

What is a Shoulder Screw?

A Shoulder Screw (SCREW,SHOULDER) is an externally threaded fastener whose threaded portion is of one nominal diameter, No 0 (0.060 IN.) (1.5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below No. 10 (0.190 IN.) (5 mm) nominal diameter. No. 10 (0.190 IN.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use SCREW, EXTERNALLY RELIEVED BODY. For items with a No. 10 (0.190 IN.) (5 mm) or larger thread diameter without an inserted driver head, use BOLT, SHOULDER. Excludes BOLT, INTERNAL WRENCHING and SCREW, CAP, SOCKET HEAD.

What is a Close Tolerance Screw?

A Close Tolerance Screw (SCREW,CLOSE TOLERANCE) is a SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

What is a Panel Screw Assembly?

A Panel Screw Assembly (SCREW ASSEMBLY,PANEL) is a headed, threaded fastening device over which may be assembled; (1) a stand-off; (2) a flanged bushing with washer(s) and/or a shouldered bushing without a flange, or it may have an internally threaded sleeve that is an integral part of the screw; a washer and an externally thread self-locking bushing that is driven by an inserted driver. Attached to panel by threaded bushing or by flaring end of stand-off, or bushing. Used in conjunction with a speed nut, nut plate, or driven into a threaded hole in the item that the panel is fastened to. May be spring loaded.

A Lag Screw (SCREW,LAG) is an externally threaded fastener having a square or hexagon head and with a continuous thread (wood screw type or fetter type) extending from a gimlet or cone point for a distance of slightly more than one-half the length of the screw.

What is a Tapping Screw?

A Tapping Screw (SCREW,TAPPING) is a hardened externally threaded fastener whose thread extends to the bearing surface of the head. The thread may be fluted or otherwise designed to cut or form its own mating thread. Excludes SCREW, ASSEMBLED WASHER.

Screws - Canada (CA)

Federal Supply Class (FSC): 5305

NATO Supply Classification Class (NSC): 5305

Federal Supply Group (FSG): 53 Hardware and Abrasives

NATO Supply Classification Group (NSG): 53 Hardware and Abrasives

Items Managed by Canada (CA) - NCB is 20 or 21

Page 51 of 85

NSN Format for Screws
Codified by Canada

53	05	21	XXX
Group FSG	Class	NCB	Identifier
FSC Federal Supply Class		NIIN
NSN

NATO Supply Class 5305 is a classification for screws within NATO Supply Group 53, which is dedicated to hardware and abrasives.

Screws are essential fasteners used to join two or more objects together by applying torque to the screw head, which then threads into a corresponding hole or nut. They come in various sizes, shapes, and materials to suit different applications.

NATO Supply Class 5305 encompasses a wide range of screws, including but not limited to:

1. Machine screws: These are typically used to fasten metal parts together and are available in different head types (e.g., flat, round, pan) and drive types (e.g., slotted, Phillips, hex).

2. Wood screws: Designed specifically for use in wood, these screws have a tapered point and coarse threads to provide a secure grip.

3. Self-tapping screws: These screws have a sharp, self-drilling point that eliminates the need for pre-drilling. They are commonly used in metal or plastic applications.

4. Sheet metal screws: These screws have sharp threads and a flat or rounded head. They are used to fasten metal sheets or thin materials together.

5. Thread-cutting screws: These screws have a cutting edge on the thread, allowing them to create their own mating threads in materials such as plastic or metal.

It's important to note that NATO Supply Class 5305 is just one classification system used by NATO to categorize and standardize supplies. This classification helps ensure compatibility and interoperability among NATO member countries when procuring screws for military or defense-related purposes.

If you need more specific information about a particular type of screw within NATO Supply Class 5305, please let me know.

Frequently Asked Questions(FAQ) for Federal Supply Class 5305

Supply Items Included in Federal Supply Class 5305

Stock Items From Supply Class 5305 Page 51 of 85