Spiralock Corporation has re-engineered the standard (female) internal thread form and added a 30° wedge ramp at the root of the thread. Through this unique design, Spiralock® thread form is exceptionally resistant to thread loosening and stripping, caused by transverse vibration. Eliminating the need for secondary locking devices, Spiralock provides reliable fastening solutions for applications in a wide range of industries, including aerospace, military, automotive, truck, diesel and IC engines, medical, oil/gas and power generation, farm and construction and others.

1. AS/EN/JISQ9100 REV B and ISO 9001:2008 Registered Company www.spiralock.com An effective, proven and reliable solution to prevent threaded joint loosening problems

2. Copyright Notice This presentation is a property of Spiralock Corporation . Reproduction, distribution, display and use of the presentation without the written permission from Spiralock is strictly prohibited. Spiralock Corporation Management

3. Spiralock Technology What is Spiralock? A self-locking female thread form with a 30 o wedge ramp at the root of the thread The wedge ramp allows the bolt to spin freely until clamp load is applied. At that point, the crests of the standard male thread are drawn tightly against the wedge ramp, creating a continuous spiral line of contact along the entire length of the thread engagement.

4. Mates with standard male thread Faster to assemble, reduced operator fatigue Free spinning Wedge tightens as clamp load builds Reusable No deterioration of lock feature Self-centering of male fastener Pushed inward from all sides Radial load distribution Lowers chance of shear failure Improved fatigue life Load carried across all threads Resistant to vibration loosening Eliminates radial clearance - no transverse motion Resistant to galling Reduced surface contact minimizes galling Features of Spiralock

5. 60 ° Thread Male thread crest engagement in helical fashion Compatible with 2A & 3A, and 4g6g (metric) external threads Prevents vibration-induced movement Spiralock Significant radial clearance designed in Contributes to thread fit variations Primary reason vibration loosening can occur Thread Tolerances CLEARANCE

6. 60° Threaded Joint Band-Aids Adhesive Patch bolt Lock washers Disk lock - wedge type Serrations Jam nuts Lockwire Cotter pin Tab lock Prevailing torque All metal Nylon ring Interference fit None of these “fixes” address the root cause of loosening! Primarily a fail-safe to hold the hardware after loss of tension Spiralock modifies basic joint behavior instead of relying on thread friction

7. Vibration Loosening Junker’s Test Cam driven transverse movement Most severe condition to accelerate self-loosening Treats fastener like it is undersized for application Contact Pressure Variation Rotation of the Nut Bending Moment Micro-Slip Between Threads External Load

8. Junkers Vibration Test Test Parameters: ¼”-28 nuts, 20 Hz vibration, ±0.033” amplitude Source: Kaynar Corporation

9. Thread Stress Distribution Spiralock Thread Standard 60° Thread Direction of Tension Source: Kaynar Corporation Radial thread loading distributes stress, improves fatigue life Stress concentrated on first engaged thread

10. Thread Stress Distribution Spiralock Thread Standard 60° Thread Direction of Tension Source: Kaynar Corporation Radial thread loading distributes stress, improves fatigue life Stress concentrated on first engaged thread

11. Taps - Cutting & Forming Spiralock Product Selection Thread Turning Thread Milling Hex flange nuts Wire thread inserts Self-clinching nuts Molded & ultrasonic inserts Made-to-order fasteners Three Part Gauging System Checks Pitch Diameter & Thread Geometry

12. Industries served Medical Aerospace Automotive Oil, Gas & Power Generation Heavy Truck Farm/Construction Equipment Diesel & IC Engines Military

13. Spiralock contact information Spiralock Headquarters: 25235 Dequindre Rd Madison Heights, MI 48071 Tel. (248) 543-7800 or (800) 521-2688 www.spiralock.com Email: [email_address]