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Part# 11-06916
MFR Model# 21M-PL042-BH
Bogert PNLengthDescriptionPN
21M-PL042-BH42P-LEAD 42" BENDIX HEX NUT11-06916


P-Leads are a critical part of the ignition system and their good condition is vital to safety and airworthiness. P-leads are often overlooked and seldom replaced because replacement p-leads are not available from the aircraft manufacturer and materials to fabricate new p-leads are not commonly available. Because most leads are shielded, mechanics do not have the materials, tooling or the experience to fabricate p-leads.

These p-leads are fabricated using proper materials, genuine terminal kits and additional strain reliefs. Each lead is inspected and tested. It is the responsibility of the installing agency to certify that the p-lead is airworthy and matches the requirements of the aircraft.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

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July 27, 2020

The leads I received are not made as a single assembly as the picture suggests. The magneto end of the lead comes with a separate screw-in plug with a threaded stud and nut, while the wire incorporates a simple standard ring terminal connector that attaches to it. The end depicted in the pictures shows the wire feeding straight in to the mag, while the reality is that the wire attaches to the stud at a 90 degree angle.

Walt H
February 13, 2017


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: What is the gauge size wire used in the Bogart Aviation P Lead for a Bendix Magneto?

This is 14 gauge shielded.

Q: What is the threat diameter of the nut?


Q: Will this p-lead work for a Bendix S4RN21 magneto (your pn 10-51360-28)?

Yes that is the correct style nut for that magneto.

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