Safety Wire Drilling Jig

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Part# 12-16600


This tool provides a fast, simple way to drill bolt heads with virtually no broken drill bits. Made of 6061T6 hard anodized aluminum for durability. Fits 3/16" to 5/8" dia. bolts & works on hex head bolts, header bolts, 12-pt countersink & Allen head cap screws. Includes drill bushings & 2 cobalt drills.

Made in U.S.A.


Handy tool saves money on stocking drilled bolts.

Suwannee A Verified Purchase


July 23, 2021

Great jig, high quality, easy to use, and very prompt delivery time, couldnt be happier.

Danny P
September 28, 2019

Great tool!

August 10, 2017

Received the jig but seems no drill bits. Called Spruce and was told to remove the end bushing. The 2 drills are stored in the passage. Good customer service.

Ed B
August 3, 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 size drill bit is used with this safety wire drilling jig?

Per the supplier: #51 drill bits.

Q: Do you sell #51 drill bits? If so, what is the part number?

Yes, we do. It is part number 12-03698. We have added it to the accessories tab of this webpage.

Q: Will this safety wire drilling jig accommodate metric hardware?

No, this unit is for standard size bolts, not metric.

Q: Can I drill a hole on the diagonal with this safety wire drilling jig?

This unit is designed to drill a hole in the center of the head. Part number 12-15349 (See Alternate Items) can drill diagonal per the description.

Q: Will this safety wire drilling jig accommodate coarse tread hardware?

The ports are not threaded, so as long as the bolt you have fits the hole, you will be able to insert the bolt and drill the head of the bolt with this jig

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