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Part# 05-12500
MFR Model# TTP-500B


The B series firewall fitting has a 1 inch aluminum ball held in place by 2 stainless steel pressure plates. It has a swivel angle up to 50 degrees from straight and is held to the firewall with 6 #4 screws.

Assembly weighs only 1.0oz-1.3oz ( .06lb-.08lb) depending on ball hole size.

Ball hole sizes available are .125, .188, .218, .240, .250, .260, .330, .375, .438 and .500.

Order example: TTP-125B (.125 ball hole size)
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Outstanding quality. Took less than an hour to install. Taped the template to the firewall which made drilling the holes a piece of cake. Used a step drill for the large center hole.

John S
July 2, 2018

Much smaller than I thought it would be. The included template made installation quick and painless.

Tom L
January 12, 2018


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: Would I use a .188 for a 3/16 cable - or the next size up?

Yes, you will need the .188 which is P/N# 05-00957.

Q: Is the ball on these split in half to clamp over the cable or do you have to order larger hole for the end of the ACS A-800?

Yes, the ball splits in half so you can clamp it over the cable.

Q: What size fitting is needed for the A-920 cable?

The A-920 housing is 1/4" O.D.. You can use the .250" or for a firm grip, the .240" unit to secure it.

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