Features

• Additional joint strength in low tensile materials such as aluminum, magnesium and plastics.
• Self-locking internal threads.
• Wear-resistant internal threads in soft materials.

How it Works

T-Sert® inserts require no locking rings or other separate locking devices. An integral, self-locking element extends longitudinally through the wall of the insert, and provides simultaneous locking action for both internal and external threads in accordance with MIL- I-45932. The torque developed by the T-Sert locking element provides approximately twice as much torque on the external as on the internal diameter, precluding the possibility of unintentional rotation after installation.

During installation of the mating fastener the T-Sert self-locking element flows into the thread root, forcing the fastener threads into metal-to-metal contact with the threads of the T-Sert insert, thus holding it securely. Because the T-Sert locking action is prevailing, and does not depend upon the seating of the mating fastener, it does not loosen with severe vibration or shock. Mating fasteners need no lockwashers, adhesives or lock wiring or any other expensive additional devices.

What Makes T-Sert Inserts Superior to Other Threaded Inserts?

Economical
Because of inherent simplicity of design, T-Sert inserts cost substantially less than all other types of solid wall, self-locking inserts. And with easy installation the installed cost of T-Sert inserts is less than that of all other inserts; particularly wire-type inserts.

Either-end installation means that T-Sert inserts can be installed more quickly than other insert types since they do not have to be oriented, permitting additional economy in timesaving. All this makes T-Sert inserts the most economical insert available.

Reusable
T-Sert inserts internal thread lock can be reused a minimum of fifteen times. Extremely low cold flow and exceptional memory in the T-Sert locking element assures reusability that meets the requirements of MIL-I-45932.

High Strength
One piece, solid wall construction gives T-Sert inserts the ultimate in both torque and tensile strength.

Excellent Corrosion Protection
T-Sert inserts do not break the surface coating on the parent material as do key, ring, swage-locked or self-tapping inserts.

Easier, Quicker To Install
T-Serts inserts require no special hole preparation, no special counterbores, tapes or gages, no indexing or referencing operations. The inserts are installed by utilizing the internal thread of the insert and a simple driving tool. And, because they do not require a swaging or ramming home of keys or rings, T-Sert inserts cause no undue stresses due to installation.

Locking Element Material

Size Variations

For each thread size offered, T-Sert inserts are available in the three variations:

Installation Procedure

It’s easy as one-two-three. Drill, countersink and tap the mating hole. Then use recommended T-Sert driver to install the T-Sert quickly and easily.

1. T-Sert insert is threaded onto the driver.
2. The T-Sert driver installs T-Sert flush to .010-.020 below the surface of the parent material.
3. Driver is backed off, leaving the insert permanently installed.

How to Specify

Please download this page (104Kb Adobe Acrobat PDF file) for detailed specifying information.

Hole Preparation

Hole preparation for T-Sert inserts is accomplished with standard drills and taps. For added wall strength, however, T-Sert inserts are manufactured with a modified external minor thread diameter. To ensure proper fit and function use the drill and tap sizes specified in Table 2 of the download version of this page (104Kb Adobe Acrobat PDF file).

1. Locate and drill with standard drill.
2. Countersink with standard countersink (82° to 100°)
3. Tap with standard unified thread series tap

See for Yourself

Send us a sample of your part or fastener, along with a brief description of its application and performance requirements, and we’ll process it using the most appropriate Long-Lok thread locking or sealing method. Or, to sample a standard Long-Lok fastener, simply supply us with a part number. Samples are provided free of charge. Call your nearest Long-Lok facility for assistance.