Headed Sleeve

The Nyltite Headed Sleeve fits on a screw, bolt , rivet or simply in a hole without a screw.  When used with a screw or rivet, the Headed Sleeve and screw (or rivet) work together under pressure to form an ideal fastener and seal.  When used as a hole liner without pressure, it functions as an electrical insulator, mechanical isolator, hole liner, grommet, bearing or bushing.

For fastening and sealing, the Headed Sleeve acts in a manner similar to that of the Nyltite Rolled Collar but in addition to the collar, it has a shank that extends into the hole, providing more material to the screw/workpiece interface.  These shanks are the lightest and thinnest available on the market, minimizing your need for product redesign to accommodate it.  If the shank is made to extend from the screw or bolt head to the nut or mating surface before the nut is tightened it provides material to the nut or mating surface.  You can specify the length of the shank. When tightened, the sleeve’s head flows inward, into the hole, into the screw threads, and under the screw head as described in Nyltite Rolled Collars . The shank of the sleeve flows to fill the clearance hole and the screw threads on the shank of the bolt, and the excess material flows around the nut. This flow is under high pressure and becomes integral to the fastened joint.

For non-fastening purposes, the Nyltite Headed Sleeve is not under pressure, in which case the shank acts as a hole liner so that the Nyltite Headed Sleeve can function as an insulator, isolator, grommet, bearing or bushing.  The head helps keep it in place and, together with the shank, makes this device an excellent strain relief for electrical wires.

We can provide you he Nyltite Headed Sleeve directly or as a sleeve that is pre-mounted on a screw as a Nyltite Assembled Fastener. If you do not need a shank we can provide you with the Nyltite Rolled Collar either alone or pre-assembled on a screw.

We also sell Nyltite Headless Sleeves for applications where fastening and sealing are not an issue. Like other Nyltite sleeves, headless sleeves provide excellent mechanical and electrical isolation, superior to those of conventional isolators. They also function as excellent bearings or bushings and can be used to prevent galvanic corrosion between dissimilar metals. Variations of the headless sleeve include the Nyltite Snap Bushing mentioned above.

The Headed Sleeve on a screw, bolt or rivet makes an excellent fastener and sealer.  Used without a screw or rivet it can function as an electrical insulator, mechanical isolator, bushing, grommet or bearing.  The product is inherently versatile.  We can enhance any or any combination of the above characteristics to meet your particular need.

For example, we can customize the roll of the collar and the length of the shank to make the Nyltite Headed Sleeve place the right amount of nylon exactly where you need it for fastening or sealing.  We can also customize it for optimizing any of the above-mentioned non-pressurized uses, depending on your application.  We will work with you to find the correct configuration that meets your requirements.

Variations of the Headed Sleeve
For locking and sealing, if more material is required under the nut than can be provided by a single Headed Sleeve, we suggest using opposing sleeves: one under the bolt head and the other under the nut.  We can tailor the lengths of the shanks to accommodate this double-headed configuration.  Another approach for providing more nylon for fastening applications is using the Nyltite Double-Walled bushing.

The Nyltite Double-Walled bushing can also act as a thick hole-liner, bearing, bushing, insulator, or isolator.  The thickness may be necessary for your particular situation.   Again, we will work with you to find the solution to your requirements.

If space or clearance is critical, we suggest using a Nyltite Flat Headed Sleeve.  For non-fastening purposes, the Nyltite Snap Bushing is an alternative to the headed sleeve with an additional  feature that helps keep it in place.