VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!
- Today's Posts | Insert Pics


Go Back   VAF Forums > RV Firewall Forward Section > Traditional Aircraft Engines
Reload this Page IO-540 Vaccuum Pad Stud Size
Register FAQ Members List Calendar Today's Posts

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 10-21-2012, 08:01 AM
Auburntsts's Avatar
Auburntsts Auburntsts is offline
 
Join Date: Jan 2005
Location: Tampa, FL
Posts: 2,861
Default IO-540 Vaccuum Pad Stud Size
Folks,
I want to add a standby alternator on my 540's vacuum pad but my rebuilt didn't come with any hardware for the studs. What' the stud size or the right metal lock nut to use?
__________________
Todd "I drink and know things" Stovall
PP ASEL-IA
RV-10 N728TT - Flying!
WAR EAGLE!
Reply With Quote
  #2  
Old 10-22-2012, 01:16 PM
mahlon_r mahlon_r is offline
 
Join Date: Jan 2005
Posts: 1,024
Default
Should be 1/4-20 threads.
Good luck,
Mahlon
__________________
"The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at your own risk."
Reply With Quote
  #3  
Old 10-22-2012, 01:23 PM
Auburntsts's Avatar
Auburntsts Auburntsts is offline
 
Join Date: Jan 2005
Location: Tampa, FL
Posts: 2,861
Default Another issue
Thanks Mahlon for the info. A quick search of the usual suspects (ACS, Vans's, Wicks, etc) didn't turn up an AN 363-4 metal lock nut with coarse threads (20 vs. 28). Anyone have a suggestion? For those with vacuum pumps or alternators on that pad, what fastners are being used?
__________________
Todd "I drink and know things" Stovall
PP ASEL-IA
RV-10 N728TT - Flying!
WAR EAGLE!
Reply With Quote
  #4  
Old 10-22-2012, 01:42 PM
rocketbob's Avatar
rocketbob rocketbob is offline
 
Join Date: Jun 2006
Location: 8I3
Posts: 3,562
Default
Tractor Supply is where I get course thread hardware for engines. Buy it by the pound there. The stuff you buy there is better (Grade 8) than what Lycoming uses (Grade 5).
__________________

Please don't PM me! Email only!

Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
Reply With Quote
  #5  
Old 10-22-2012, 01:53 PM
rleffler's Avatar
rleffler rleffler is offline
 
Join Date: Jun 2006
Location: Delaware, OH (KDLZ)
Posts: 4,194
Default
I've been able to get some from NAPA in the past as well.
__________________
Bob Leffler
N410BL - RV10 Flying
http://mykitlog.com/rleffler
Reply With Quote
Reply

« Previous Thread | Next Thread »


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 09:53 PM.
Contact Us - VAFForums Home - Archive - Privacy Statement - Top

The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.