For an axial barrel nut, see weld nut and Sex bolt.
On some firearms the gun barrel is fastened to the receiver with a nut, referred to as a barrel nut.
Barrel nut with M6 thread
A barrel nut (also known as steel cross dowel or dowel nut) is a specialized forged nut, and is commonly used in aerospace and ready-to-assemble furniture applications.
It is used to bolt thin sheet metal parts to larger, often billet or forged, parts. The barrel nut is a round slug, or formed sheet metal part with threads perpendicular to the length of the nut. The nut sits in a hole inside the forging and a standard bolt is threaded into the barrel nut from outside the sheet metal. They are preferred over a standard nut and bolt, because they do not require a flange to be machined or forged onto the receiving part, thus reducing weight.[1]
Furniture cross dowel barrel nuts are cylindrical shaped metal nuts (metal dowels) used with furniture connector bolts to join two pieces of wood. The inside threaded hole is unusual in that it passes through the sides of the dowel. To install, the pieces of wood to be joined are aligned, then a bolt hole is drilled through one piece of wood and into the other. A dowel hole is drilled laterally across the bolt hole and the cross dowel is inserted into it. The end of the cross dowel is slotted so that a screwdriver can be inserted to rotate the dowel so that its threaded shaft aligns with the bolt hole. The furniture connector bolt is then inserted into the bolt hole and screwed into the cross dowel until the wood pieces are held tightly together.
Barrel nuts are also common in flat-pack furniture, where long bolts and barrel nuts are used to hold together T joints in chipboard sheets.
A 10 mm long barrel nut with M6 threads
Sketch of use in furniture
A cutaway drawing of a cross dowel in use
Sketch of use in wood construction
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Smith, Carroll (August 5, 1990). Carroll Smith's Nuts, Bolts, Fasteners and Plumbing Handbook. MotorBooks/MBI Publishing Company. pp. 107–108. ISBN 0879384069.
the gun barrel is fastened to the receiver with a nut, referred to as a barrelnut. A barrelnut (also known as steel cross dowel or dowel nut) is a specialized...
SPR MOD Sleeve, while the Gen III Freefloat Forearm, due to its larger barrelnut, only works with the ARMS #38 SPR PEQ-2-3. The original SPR used an early...
receiver or frame (Mauser C96), part of the barrel (H&K USP) or part of the barrelnut/locking lugs (AR-15). Some firearms, like the FN Five-seven, have a beveled...
at one point (on the barrelnut by the upper receiver) while the remainder of the handguard does not make contact with the barrel. This gives the impression...
disassembled and weighs 3.25 pounds. Disassembly requires loosening a barrel retention nut by hand or with a supplied tool. It is designed as a hiker and camper...
velocity. Barrelnut: A firearm component used on barrels. On handguards, a barrelnut may refer to the component that holds the handguards to the barrel. On...
Anschütz Model 54, AKM and Sauer 101. Barrelnut Attaching the barrel to the receiver using a barrelnut and a barrel with a shoulder is an alternative to...
at both ends of the barrel. By unscrewing the muzzle nut, the shroud and barrel could be removed and replaced with different barrel lengths and shroud...
Ban: the folding stock was replaced with a wooden thumbhole stock, the barrelnut was welded in place, and the bayonet lug was removed. The gun had a gray...
that attaches the handguard, unlike traditional systems that utilize a barrelnut to connect the handguard system to the upper receiver. This results in...
proprietary barrelnut design. The barrel is threaded to fit the Ruger action threads. This way, a competent gunsmith only needs an AR-15 barrel wrench and...
5 lbs. The floating bolt head and barrel-retaining nut, features pioneered by Savage in the models 340 (barrelnut), introduced in 1950, and the 110 bolt...
non-foldable stock, carbine length gas system, a new barrelnut (which eliminates the quick change barrel), and a folding charging handle. These changes made...
steel .338 barrel with 1:9.5 twist, 5R rifling, and Melonite (ferritic nitrocarburized) finish One piece handguard with 20 MOA top rail Barrelnut accessible...
carbine. Most 21st century production versions feature a barrel shroud that runs from the barrelnut to the muzzle. In 2015, Patrick McFarland purchased the...
feature being a shorter barrel and serrated area in front of the barrelnut. Overall length 42.9 in (1.09 m), 22.25 in (0.565 m) barrel length. Weight 19 lb...
a wheel: "...and the spokis, and dowlis of tho wheelis..." Bar stock Barrelnut Dowel reinforced butt joint Dowel bar retrofit Fastener Kinematic coupling...
reinforced by steel plates and rivets. The front is reinforced to accept the barrelnut and gas cylinder which are permanently mounted. Guide rails that support...
bolt-carrier key with the interface behind the cam pin, oversized heat-sink barrelnut, roller cam pin, and regulating gas plug.[citation needed] "SHOT Show...
being difficult to glass bed due to the shapes of the recoil lug and barrelnut, as well as ensuring that the magazine is seated correctly. The trigger...
handguards made of 7075-T6 aluminum mounted on a matching proprietary barrelnut. UDMC states that the PVAR system is designed to be easily removed from...
and bolts, especially on seen ready-to-assemble furniture, are: Barrelnut, a type of nut which has threads perpendicular to the cylinder axis Cam fastener...
Global Information
A 10 mm long barrel nut with M6 threads
Sketch of use in furniture
A cutaway drawing of a cross dowel in use
Sketch of use in wood construction
