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09-30-2022, 09:41 AM
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Join Date: May 2006
Location: Texas
Posts: 2,199
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Quote:
Originally Posted by Walt
Hmmm...That pretty much negates the vibration resistant (locking) feature of the nutplate.
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They always stay tight. Never in all this time with all the hundreds of screws I have installed had one back out that was properly tightened. So now that I think about it, I have only had to chase the threads in a maybe 3, 4 nutplates, ever. Maybe they were out of tolerance too small. And I may have had to drill out/twist out 1, maybe 2 screws ever. Not a frequent problem. Moving ahead, I think using ACF-50 (ref Mickey's comment below) or some similar product would be the first, best course of action if you have a tight fastener.
__________________
Bryan
Last edited by Low Pass : 09-30-2022 at 09:50 AM.
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09-30-2022, 09:41 AM
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Join Date: Feb 2005
Location: LSGY
Posts: 5,103
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I find that Torx (6lobe) are so much better than Phillips head screws. If you put the tool in, and of course use the right size, it does not come out. Can't say the same with Phillips.
I have not had any issue with galling or seizing, but I always touch mine with a tiny bit of ACF-50 before screwing them in the first time. It lasts a while.
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09-30-2022, 10:53 AM
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Join Date: Mar 2008
Location: Huntsville, AL USA
Posts: 637
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THIS!
Quote:
Originally Posted by John-G
I too have found that JIS (Japanese Industrial Standard) bits seem to fit our aircraft's Philips screws better. McMaster-Carr carries them in various sizes and styles.
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I now use JIS screwdrivers on all of my Phillips screws. Much better "grip" than with Phillips screwdrivers. They are a virtual necessity if you actually have JIS head screws - like in Denso style alternators (ask me how I know  ).
__________________
Dan Langhout
2023 =VAF= Dues PAID . . . . .
RV-7 N528DP slow build
First Flight July 26th, 2014
927 hours and counting . . . .
34 Pilots N Paws Flights
Based at Moontown (3M5)
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09-30-2022, 11:36 AM
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Join Date: Aug 2021
Location: Livermore, CA
Posts: 307
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Another vote for the Torx and also echo the thinking of if you're stripping them, something other than the screw is the issue. I've used Torx in decking applications and a single Torx bit will last an entire 10 lbs box of screws and none of them strip out, this is a high Torx, high speed use case.
__________________
Johnny
N455DM - RV-6A - Bought Flying - 2021
Tip Up Canopy
IO-360-A2B
FP 66" Catta 3 blade Carbon
IFR - 2 Garmin G5s - 430W - Aera 760 - GFC500
JPI EMS-350 to monitor the temps
N89WD - Flight Design CTSW - Sold 2021
2022 Donation Happily Made!
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09-30-2022, 03:53 PM
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Join Date: Sep 2007
Location: Central IL
Posts: 6,898
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When using the inferior philips, use a superior tool.
Quote:
Originally Posted by jneves
Another vote for the Torx and also echo the thinking of if you're stripping them, something other than the screw is the issue. I've used Torx in decking applications and a single Torx bit will last an entire 10 lbs box of screws and none of them strip out, this is a high Torx, high speed use case.
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I agree that TORX is a superior engagement for screws, but only if the screw material is equal. They are not for our aviation application as mentioned by Walt and David Paul. Yes, A286 is good if you can find them in a 6-32. Our exhaust system nuts are A286.
__________________
Bill
RV-7
Last edited by BillL : 09-30-2022 at 06:15 PM.
Reason: removed 100 deg
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09-30-2022, 05:35 PM
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Join Date: May 2005
Location: Savannah, GA
Posts: 1,830
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Read somewhere that Phillips screws were designed so that you couldn't over-tighten them, instead the screwdriver would pop out.
Don't know if that's true or not.
I always have a supply of spares, and any screw head that looks even slightly worn gets pitched. Ten cent screw vs ten minutes of trying to get it out?
__________________
RV-9A at KSAV (Savannah, GA; dual G3X Touch with autopilot, GTN650, GTX330ES, GDL52 ADSB-In)
Previously RV-4, RV-8, RV-8A, AirCam, Cessna 175
ATP CFII PhD, so I have no excuses when I screw up
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09-30-2022, 05:41 PM
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Join Date: Mar 2005
Location: Dallas area
Posts: 11,641
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Quote:
Originally Posted by BillL
I agree that TORX is a superior engagement for screws, but only if the screw material is equal. They are not for our 100 deg aviation application as mentioned by Walt and David Paul. Yes, A286 is good if you can find them in a 6-32. Our exhaust system nuts are A286.
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Torx actually DO come in 100° head!
__________________
Mel Asberry, DAR since the last century. Over 1,000 certifications accomplished. Discount for Veterans, Law Enforcement, Fire Fighters.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1, Lifetime EAA.
Recipient of EAA Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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09-30-2022, 05:57 PM
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Join Date: Feb 2005
Posts: 599
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To prevent galling of the SS screws use Boelube on the thread, it always worked for me.
Glenn
__________________
_____________________________________________
RV-4 Sold
N654RV @ MLJ
RV-7 Coming Soon
N987RV Reserved
2022 Donation Gladly Paid
"Maintain Thy Airspeed, Lest the Earth Arise and Smite Thee"
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09-30-2022, 06:19 PM
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Join Date: May 2020
Location: Fort Collins, CO
Posts: 774
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Quote:
Originally Posted by 9GT
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Micro has a pretty good supply but only 1/2" long in 6-32.
__________________
14A-EXP119 Thunderbolt
Begun 07-23-20
Emp Completed 11-12-20
Slo Fuse Completed 3-2-21
QB Wings 99% Complete 7-30-22
Wiring and Avionics 85%
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2023 Dues Paid
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Last edited by rockitdoc : 09-30-2022 at 06:31 PM.
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09-30-2022, 06:29 PM
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Join Date: May 2020
Location: Fort Collins, CO
Posts: 774
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Quote:
Originally Posted by wirejock
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They only seem to have the 82 degree flat heads and they cost $8.90/ea? Maybe this is for 100 pieces? Couldn't find that in the description, though.
I may stick with JIS screwdrivers and Phillips
__________________
14A-EXP119 Thunderbolt
Begun 07-23-20
Emp Completed 11-12-20
Slo Fuse Completed 3-2-21
QB Wings 99% Complete 7-30-22
Wiring and Avionics 85%
Cowl Completed sans paint 10-30-22!
2023 Dues Paid
Reserved: N52XL
Last edited by rockitdoc : 09-30-2022 at 06:32 PM.
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