Fasteners are hardware device that mechanically joins or affixes two or more objects together. Fasteners can also be used to close a container such as a bag, a box, or an envelope and they may involve keeping together the sides of an opening of flexible material, attaching a lid to a container, etc. Fasteners used in these manners are often temporary, in that they may be fastened and unfastened repeatedly.

Furniture supplied in flat-pack form often uses cam dowels locked by cam locks, also known as conformat fasteners.

Items like a rope, string, wire, cable, chain, or plastic wrap may be used to mechanically join objects; but are not generally categorized as fasteners because they have additional common uses. Likewise, hinges and springs may join objects together, but are ordinarily not considered fasteners because their primary purpose is to allow articulation rather than rigid affixment.

Other alternative methods of joining materials include welding,taping,crimping,soldering, brazing, cementing, or the use of other adhesives. 

There are three major steel fasteners using in industries. Stainless Steel, Carbon Steel and Alloys Steel

Major Grade using in Stainless Steel Fasteners. 200 series 300 series 400 series.

(reference by Wikipedia)

Stud welding is a form of spot welding where a bolt or nut is welded onto another metal part. The bolts may be automatically fed into the spot welder. Weld nuts generally have a flange with small nubs that melt to form the weld. Studs have a necked down, un-threaded area for the same purpose. Weld studs are used in stud welding systems.

The tip on the weld end of the stud serves a twofold purpose:

• It acts as a timing device to keep the stud off the base material
• It disintegrates when the trigger is pulled on the gun.

When the tip disintegrates, it melts and helps solidify the weld to the base material.

Stud welding also known as stud arc welding, joins a stud and another piece of metal together. The stud is usually joined to a flat plate by using the stud as one of the electrodes. 

Weld studs are used to secure back plates and various components to enclosure without making the reverse side marking. This type of studs are extremely cost-effective and durable.

reference by wikipedia

Sex bolt also call  a barrel nut, barrel bolt, Chicago screw or post and screw. Sex bolt is a type of fastener which has a barrel-shaped flange and protruding boss that is internally threaded. The boss sits within the components being fastened, and the flange provides the bearing surface. 

The sex bolt and accompanying machine screw sit flush on either side of the surfaces being fastened. It is normally chosen because of its low profile compared to other nuts. It often has a built-in feature, like a slot, to aid in tightening the fastener. Some sex bolts are commonly which are architectural bolts, have knurled barrels to allow one-sided assembly. Binding posts are similar to architectural bolts in that they are designed to be assembled from one side, but they have teeth on the flanged surface to keep them fixed. They were originally designed for the printing industry to bind large catalogs together. 

reference by wikipedia..

Cage nut can be assembled easily into position without the need for special tools and it is consists of a square nut in a spring steel cage which wraps around the nut. The cage has two wings that when compressed allow the cage to be inserted into the square holes in equipment racks, and while released hold the nut in position behind the hole.

Using cage nuts mounted in square holes provides several benefits over threaded holes directly in the cage. First, one has the flexibility to choose the size of nuts and bolts at a time after the cage is installed.  Second, it is easy to  replace. Third, this can allow for a better strength-to-weight ratio, as only the nuts need to be made of a strong material suitable for threading.

The gap between the two wings determines thickness of material that will hold nut in correct position without pulling it from the base material. The size of square hole will also govern the position of nut. If size of hole is too large it will still pull out from base material. There are two types of cage nuts:

A) SLIDE-ON:

These nuts are used when rails are square punched because in such a case it becomes easy to move mounting hardware.

B) SNAP-IN:

These nuts are used for rails that are punched with square mountings in data cabinets.

The most common use for cage nuts is to mount equipment in square-holed 19-inch racks . There are four common sizes: 10-32 and to a lesser extent 12-24 are generally used in the United States; elsewhere M6 (6 mm outside diameter) for light and medium equipment and M8 for heavier equipment such as uninterruptible power supplies (UPSs).

reference by wikipedia.

CAGE NUT

MATERIAL AVAILABLE：
CARBON SPRING STEEL

SURFACE FINISH AVAILABLE：
YELLOW ZINC, ZINC, BLACK.

HARDNESS：
HRC 40-50.

Screws are used to hold two objects together or to fasten one object to the other. Some screws are designed to screw into a pre-threaded material (internal thread) such as a nut or a theaded hole while others screw directly into a surface while creating their own hole. Common screw head types include: round, flat, pan, oval, truss, and hex. Drive types include, phillips, slotted, torx, hex and socket. The most popular screws are: wood screws,stainless steel screws and machine screws.

Bolts can come fully or partially threaded depending on the bolt type. Common bolt head types include: hex, flange, button and flat heads. Various bolt drives include: socket, hex and square drives. The most popular bolts are:stainless steel bolts, grade 8 bolts, carriage bolts and hex bolts.

A bolt is an externally threaded fastener designed to  insert through holes in assembled parts, and is normally intended to be tightened or released by torquing a nut. A screw is an externally threaded fastener capable of being inserted into holes in assembled parts, of mating with a preformed internal thread or forming its own thread, and of being tightened or released by torquing the head. An externally threaded fastener which is prevented from being turned during assembly and which can be tightened or released only by torquing a nut is a bolt, for example round head bolts, track bolts, plow bolts. An externally threaded fastener that has thread form which prohibits assembly with a nut having a straight thread of multiple pitch length is a screw, for example wood screws, tapping screws.

    

A carriage bolt as known as a coach bolt, it has a domed or countersunk head, and the shank is topped by a short square section under the head. The square section grips into the part being fixed (typically wood), preventing the bolt from turning when the nut is tightened. A rib neck carriage bolt has several longitudinal ribs instead of the square section, to grip into a metal part being fixed.

 

Drawing on over 30 years of expertise, Top Screw Metal Corp., a veteran maker of fasteners, has worked out an innovative nut dubbed E Self-Driving Nut. 

Inspired from the fact that installation of conventional coupling nuts is usually subject to raw materials of joined threaded rods, while calling for use of several different types of tools, the company hence comes up with the innovative nut, which, the company claimed, is literally a blind rivet nut with special head design that can effectively keep the nut away from picking. 

Besides, the nut is finished to bright, smooth surface for an enhanced visual impression, and easy to install and remove with a single tool. Available in a wide range of specifications, the product is ideal for use in public housings, stressed the company. 

Founded in 1975, the company supplies a variety of special fasteners, including blind rivet nuts, bolt rivet nuts, self tapping threaded inserts, security fasteners, clinching parts, binding post screws, blind rivets, speed pin rivets, blind jack nuts, and welding studs, in addition to conventional screws, nuts and bolts. 

Backed by integrated, automated in-house production, which is driven by a sound line of state-of-the-art machinery, such as precision cold forging and heading machines, treading machines and screening machines, the company boasts better production efficiency and flexibility and ample capacity. Besides, the quality-driven company also pays strong attention to quality inspections and employs various instruments, including computerized torsion testers, 3D projectors, Vickers hardness testers, and coating thickness gauges and testers. 

Committed to quality and customer satisfactions, the company has already built positive business links with customers from over 80 different countries of the world.  

(reference by CENS.com)

TOP SCREW METAL CORP.

T:+886-4-7237159

F:+886-4-7246640

E-Mail: recept@topscrew.com.tw

www.topscrew.com.tw

Anchor bolt is used to attach objects or structures to concrete. Wedge anchors, also known as expansion bolts and expansion anchors. There are three basic styles of wedge anchors, fully threaded, partial threaded and the full-bodied wedge anchor. The simplest anchor bolt is a cast-in-place anchor. Cast-in-place anchor bolts are the strongest type of fastener, but the casting is difficult, and they are usually only used for heavy machines mounted on poured concrete floors. Another use of this anchor bolt is to connect the concrete foundation of a building to its wall. Use this, the building is more resistant to earthquakes. A concrete screw is another way of attaching things to concrete that has already been poured and set.

Features of Anchor bolt: 

• Easily installable
• High load capacities even in the low density base material
• Without Thermal bridge
• Quick installation
• Double Safety features
• Material electroplated and galvanized

 

Blind Rivet Nuts are internally threaded rivets that can be installed into sheet-metal, tubing, extrusions, and plastics. Blind Rivet Nuts provide a reliable system of inserting high quality load bearing threads, available in three different styles.

A rivet nut, also known as a blind nut or nut-sert, is a one-piece internally threaded and counterbored tubular rivet that can be anchored entirely from one side. There are two types: one is designed to form a bulge on the back side of the panel as a screw is tightened in its threads. The other is similarly drawn in using a screw, but is drawn into the sleeve instead of creating a bulge. Rivet Nuts installed from one side only, provide a deep re-usable thread, even in thin materials.

For bike, most screw hole of blike rim are used " blind rivet nut" , casue of the frame and rim made of  sheet-metal, so install with blind rivet nut that can make the application surface flat and smooth. The surface finish will not be damaged after installtion. 

 The Aluminium Left Threaded Blind Rivet Nut  fo Top Screw Metal Corp. is : 

• EASY AND FAST INSTALLATION.
• HIGH TORQUE AND STRONG THREADS ARE COMPARABLE TO NORMAL FASTENERS.