DYNA-THRED®
Dyna-Thred® II All Metal Type
400°F to +1200°F
Reusability per IFI 124 and MIL-F-8961
The unique, all-metal Dyna-Thred II design is a technological breakthrough in reliable self-locking fasteners. Extensive tests prove that the locking action of Dyna-Thred II fasteners maintains minimum torque requirements after more than 15 re-uses. The patented Dyna-Thred lock is formed of the fastener itself and requires use of no additional locking element materials. Locking action takes place in a full hoop, 360° around the thread, providing an equal load on all sides.
The Dyna-Thred II lock is made by forming a close tolerance hole axially into the threaded end of a fastener. A controlled area of the cavity is dilated to expand the periphery of a controlled thread area. The pitch diameter of the first thread is left unchanged for starting ease. The result: an easily installed, highly reliable, self-locking bolt or screw. Dyna-Thred II bolts meet all the performance requirements of, and is qualified to, Specification MIL-F- 8961.
Use Dyna-Thred II fasteners whenever extreme heat and punishing vibration loosen or destroy other fasteners:
- Airborne turbo-prop engines
- Ground-based turbines
- Commercial and military aircraft braking systems
- Auxiliary power units
- Rapid transit and rail subsystems
Military Specifications:
MIL-F-8961
Commercial Standards:
IFI 124, IFI 524 (Metric)
| Materials | Tensile Strength, PSI | Operating Temperature Range |
|---|---|---|
| Grade 5. Alloy Steel | 125,000 Minimum | up to 1200°F |
| Grade 8, Alloy Steel | 150,000 Minimum | up to 1200°F |
| A-286 CRES | 160,000 – 170,000 | up to 1200°F |
| Mild Carbon Steel | 55,000 Minimum | up to 1200°F |
| 300 CRES | 75,000 Minimum | up to 1200°F |
| Inconel™ | 185,000 Minimum | up to 1200°F |