FAA approved on over 1000 aircraft

True-Lock is the only patented aviation wheel fastener system in the world that has been awarded an STC (Supplemental Type Certificate) by the FAA for axle nut technology.

True-Lock LLC holds over 1,000 FAA certifications for aviation fastener design. All True-Lock fastener systems are guaranteed for the life of your aircraft and pay for themselves over time by reducing downtime and fewer replacement parts. So, If you want a wheel fastener system for your aircraft that sets the industry standard for vibration mitigation and cost reduction, then True-Lock is what you need.

Piper Aircraft Models

This True-Lock system APV-SA3 is compatible with many Piper aircraft models:

PA-28-140, PA-28-150, PA-28-151, PA-28-160, PA-28-161, PA-28-180, PA-28-181, PA-28-235, PA-28-236, PA-28-201T, PA-28S-160, PA-28S-180, PA-28R-180, PA-28R-200, PA-28R-201, PA-28R-201T, PA-28RT-201, PA-28RT-201T.

Installations Instructions: APV-GA-2


Cessna Aircraft Models

This True-Lock accessory APV-SA1 is compatible with the following Cessna aircraft models:

150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, A150K, A150L, A150M, F150G, F150H, F150J, F150K, F150L, F150M, FA150K, FA150L, FRA150L, FRA150M, 152, A152, F152, FA152

Installations Instructions: APV-GA-2

The True-Lock Fastener System APV-.937-16-K4 is compatible with the following Twin Cessna aircraft models:

310, 310A(USAF U-3A), 310B, 310C, 310D, 310E(USAF U-3B), 310F, 310G, 310H, E310H, 310I, 310J, 310J-1, E310J, 310K, 310L, 310N, 310P, T310P, 310Q, T310Q, 310R, T310R, 321 (Navy OE-2), 320, 320-1, 320A, 320B, 320C, 320D, 320E, 320F, 335, 340, 340A, 401, 401A, 401B, 402, 402A, 402B, 402C, 411, 411A, 414, 414A, 421, 421A, 421B, 421C, 425

Beech Aircraft Models

The True-Lock Fastener System APV-1.50-16-K45 is compatible with the following Raytheon (Beech) aircraft models:

200, A100-1 (U-21J), 200C, 200CT, 200T, A200 (C-12A) (C-12C), A200C (UC-12B), A200CT (C-12D) or (FWC-12D) or (RC-12D) or (C-12F) or (RC-12G) or (RC-12H) or (RC-12K) or (RC-12P), B200, B200C (C-12F) or (UC-12F) or (UC-12M) or (C-12R), B200CT, B200T, 300, B300, 300LW, B300C, 1900, 1900C (C-12J)^1, 1900D^1. Note "^1": without anti-skid only.

American Champion

7AC, 7ACA, S7AC,7BCM (Army L-16A), 7CCM (Army L-16B),S7CCM, 7DC, S7DC, 7EC, S7EC, 7ECA,
7FC, 7GC, 7GCA, 7GCAA, 7GCB, 7GCBA, 7GCBC, 7HC, 7JC, 7KC, 7KCAB,

Other Aircraft Models

The True-Lock Fastener System APV-1.50-16-K46 is compatible with the following M7 Aerospace LP (Fairchild Aircraft Corporation, Swearingen) aircraft models:

SA26-T, SA26-AT, SA226-T, SA226-AT, SA226-T (B), SA227-AT, SA227-TT, SA26-T, SA26-AT, SA226-T, SA226-AT, SA226-T (B), SA227-AT, SA227-TT, SA227-CC, SA227-DC (C-26B)

The True-Lock Fastener System APV-1.50-12-K4 is compatible with the following Maule and Univair (Stinson) aircraft models:

Bee Dee M4, M-4, M-4C, M-4S, M-4T, M-4-180C,M-4-180V, M-4-210,M-4-210C, M4-210S,M4-210TM-4-220C,M-4-220S,M-5-180C,M-5-200, M-5-210C,M-5-210TC, M-5-220C,M-5-235C, M-6-180,M-6-235, M-7-235,M-7-235A, M-7-235B,M-7-235C, M-7-260,M-7-260C, M-7-420,M-7-420A, M-7-420AC,MT-7-235, MT-7-260,MX-7-160, MX-7-160C,MX-7-180, MX-7180A,MX-7-180B, MX-7-180C, MX-7-180AC,MX-7-235, MX-7-420, MXT-7-160, MXT-7-180, MXT-7-180A, MXT-7-420, M-8-235

Univair108, 108-1, 108-2, 108-3, 108-5



Installations Instructions

FAA Form 337
Major Repair & Alteration of Airframe, Powerplant, Propeller or Appliance
Download form

What Makes the True-Lock System Different?
Simple tools and simple instructions make applying the True Lock system easy. Details

True Lock is the solution for the future.
Wire ties, cotter pins and friction type locks are outdated, prone to failure and can be very time consuming to install.Both design and quality of materials used in manufacturing assure the highest standards for the FAA. Details