Product Details
Swivel Fittings and Studs (Bug Nuts) for Piper Aircraft
Save $$$ with FAA-PMA approval!
- Vast eligibility with multiple applications
- Heat-treated stainless steel
- Improved cone for less wire distortion
- Multiple FAA-PMA replacement options: buy only the swivel fitting and stud, or get the swivel assembly!
- The MC70371-00 Swivel Assembly replaces Piper P/Ns 70371-000 or 70371-800. This full assembly includes the -002 fitting, the -003 stud as well as an AN320-3 castle shear nut, MS24665-132 cotter pin, and two special sized Piper specific washers.
- Different stud lengths and swivel fitting sizes offered –see catalog for model eligibility

Representative wire clamp assembly.
The highlighted items above are included in the McFarlane Wire Clamp assembly.
Eligible Aircraft
| Make | Model | Start S/N | End S/N | Qty/Aircraft | Location | Eligibility Chart |
|---|---|---|---|---|---|---|
| Piper | J-3 | 1100 | 99999 | 1 | Fuel System | 7527 |
| Piper | J5A-80 | 5-2 | 5-9999 | 1 | Fuel System Installation | 7527 |
| Piper | J5A (Army L-4F) | 5-2 | 5-9999 | 1 | Fuel System Installation | 7527 |
| Piper | J5B (Army L-4G) | 5-2 | 5-9999 | 1 | Fuel System Installation | 7527 |
| Piper | J5C | 5-1309 | 5-9999 | 1 | Fuel System Installation | 7527 |
| Piper | PA-12 | 12-1 | 12-9999 | 1 | Engine Control Installation | 7527 |
| Piper | PA-14 | 14-1 | 14-9999 | 1 | Cabin Heat and Defroster Installation | 7527 |
| Piper | PA-20 | 20-1 | 20-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-20-115 | 20-1 | 20-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-20-135 | 20-877 | 20-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-20S | 20-1 | 20-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-20S-115 | 20-1 | 20-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-20S-135 | 20-877 | 20-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-22 | 22-1 | 22-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-22-108 | 22-8000 | 22-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-22-135 | 22-534 | 22-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-22-150 | 22-2378 | 22-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-22-160 | 22-2378 | 22-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-22S-135 | 22-534 | 22-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-22S-150 | 22-2378 | 22-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-22S-160 | 22-2378 | 22-99999 | 1 | Power Plant Installation | 7527 |
| Piper | PA-23 | 23-1 | 23-1182 | 1 | Ventilating System | 7527 |
| Piper | PA-23 | 23-1 | 23-1182 | 1 | Heater System | 7527 |
| Piper | PA-23 | 23-1 | 23-1182 | 1 | Heater System Installation | 7527 |
| Piper | PA-23-160 | 23-1177 | 23-2046 | 1 | Heater System Installation | 7527 |
| Piper | PA-23-160 | 23-1177 | 23-2046 | 1 | Ventilating System | 7527 |
| Piper | PA-23-160 | 23-1177 | 23-2046 | 1 | Heater System | 7527 |
| Piper | PA-23-235 | 27-505 | 27-622 | 1 | Heater Installation | 7527 |
| Piper | PA-23-250 (Navy UO-1) | 27-1 | 27-8154030 | 1 | Heater Installation | 7527 |
| Piper | PA-E23-250 | 27-2505 | 27-7554168 | 1 | Heater Installation | 7527 |
| Piper | PA-24 | 24-1 | 24-3687 | 1 | Cabin Heat, Defroster and Ventilating System | 7527 |
| Piper | PA-24 | 24-1 | 24-3687 | 1 | Cabin Heat, Defroster and Fresh Air Systems | 7527 |
| Piper | PA-24-250 | 24-1 | 24-3687 | 1 | Cabin Heat, Defroster and Ventilating System | 7527 |
| Piper | PA-24-250 | 24-1 | 24-3687 | 1 | Cabin Heat, Defroster and Fresh Air Systems | 7527 |
| Piper | PA-24-260 | 24-3642 | 24-5034 | 1 | Cabin Heat, Defroster and Ventilating System | 7527 |
| Piper | PA-24-260 | 24-3642 | 24-5034 | 1 | Cabin Heat, Defroster and Fresh Air Systems | 7527 |
| Piper | PA-24-400 | 26-1 | 26-148 | 1 | Cabin Heat, Defroster and Ventilating System | 7527 |
| Piper | PA-24-400 | 26-1 | 26-148 | 1 | Cabin Heat, Defroster and Fresh Air Systems | 7527 |
| Piper | PA-28-140 | 28-20001 | 28-7725290 | 1 | Cabin Heater, Defroster and Fresh Air System | 7527 |
| Piper | PA-28-150 | 28-1 | 28-4377 | 1 | Cabin Heater, Defroster and Fresh Air System | 7527 |
| Piper | PA-28-160 | 28-1 | 28-4377 | 1 | Cabin Heater, Defroster and Fresh Air System | 7527 |
| Piper | PA-28-180 | 28-671 | 28-7505260 | 1 | Cabin Heater, Defroster and Fresh Air System | 7527 |
| Piper | PA-28-235 | 28-10001 | 28-7710089 | 1 | Cabin Heater, Defroster and Fresh Air System | 7527 |
| Piper | PA-28R-180 | 28R-30002 | 28R-7130013 | 1 | Cabin Heater, Defroster and Fresh Air System | 7527 |
| Piper | PA-28R-200 | 28R-35001 | 28R-7635545 | 1 | Cabin Heater, Defroster and Fresh Air System | 7527 |
| Piper | PA-28S-160 | 28-1 | 28-1760 | 1 | Cabin Heater, Defroster and Fresh Air System | 7527 |
| Piper | PA-28S-180 | 28-671 | 28-7205234 | 1 | Cabin Heater, Defroster and Fresh Air System | 7527 |
| Piper | PA-31 | 31-2 | 31-8312019 | 1 | Fuel Control System Panel Installation | 7527 |
| Piper | PA-31-300 | 31-2 | 31-8312019 | 1 | Fuel Control System Panel Installation | 7527 |
| Piper | PA-31-325 | 31-7400990 | 31-8312019 | 1 | Fuel Control System Panel Installation | 7527 |
| Piper | PA-31P | 31P-1 | 31P-7730012 | 1 | Fuselage Pressurization Air Supply Installation | 7527 |
| Piper | PA-31P-350 | 31P-8414001 | 31P-8414050 | 1 | Fuselage Pressurization Air Supply Installation | 7527 |
| Piper | PA-31T | 31T-7400002 | 31T-8120104 | 1 | Fuselage Pressurization Air Supply Installation | 7527 |
| Piper | PA-31T1 | 31T-1104004 | 31T-8304003 | 1 | Fuselage Pressurization Air Supply Installation | 7527 |
| Piper | PA-31T2 | 31T-1166001 | 31T-8166076 | 1 | Fuselage Pressurization Air Supply Installation | 7527 |
Part Number Information
Supersedes Part Numbers
70371-00 | U70371-000
Cross-reference information
Cross Reference Reference only: Please verify the product is eligible for your aircraft before adding to your cart. OEM Part Number McFarlane Part Number Comment 70371-00 MC70371-00 U70371-000 MC70371-00
Additional product information
Approval: FAA PMA SupersedesPartNumber: 70371-00 SupersedesPartNumber: U70371-000
Product Documents
Frequently Asked Questions
Why is my new engine control too long/short?
There are several things that could be different such as engine/aircraft modifications, rigging/clocking of control arm or adjustment of rod end will be needed, placement of clamps or brackets may be different, or a previous installation change such as routing from original.
What is the minimum bend radius for my engine control?
McFarlane's Storage and Packaging Specification requires a specific packaging minimum radius based on the length of the control, type of wire used, and the configuration of the control end(s). Please contact us to determine the exact requirements for your specific control.
How do I trim my engine control to length?
Please reference the Installation Instructions included with your new control.
How do I clean and sanitize a McFarlane Push-Pull Control?
We make the following cleaning and sanitizing recommendations to be completed between flights: Recommended Cleaning Process 1. Put on clean disposable gloves prior to cleaning and disinfection. 2. Pull controls back to the fully retracted position to expose the full length of the control shafts. 3. Apply isopropyl alcohol to a clean microfiber towel. Do not spray any solution directly on the controls or any other surfaces or components in the aircraft. !!! WARNING: DO NOT USE BLEACH WIPES ON ANY MCFARLANE CONTROL !!! 4. Gently and thoroughly wipe down every control knob surface and control shaft. 5. Let cleaning solution dry on these surfaces (contact time). 6. Use a clean and dry microfiber cloth to wipe away any solution residue left on knob and control shaft surface. 7. Remove all gloves, towels, and cleaning supplies from the work area in the aircraft. Please contact McFarlane Sales directly at 866-920-2741 or 785-594-2741 or sales@mcfarlaneaviation.com if you have any additional questions regarding the disinfection of our controls.











