« previous next »
Pages: [1]   Go Down

Author Topic: Primary Chaincase Level plug thread  (Read 467 times)

Online Billybream

  • Resident Legend
  • *****
  • Join Date: Jan 2012
  • Posts: 682
  • Karma: 8
Primary Chaincase Level plug thread
« on: 24.02. 2020 15:02 »
Trying to find out thread of 15-645, it measures approx. 0.245", one of our threads lists states 5/16 x 26tpi but that's to large.
Can anyone advise, need to source one to replace stripped thread
Many thanks
Logged
1960 Super Rocket, owned since 1966, back on the road 2012 after being laid up for 29yrs.

Offline AdrianJ

  • A's Good Friend
  • ***
  • Join Date: Oct 2018
  • Posts: 215
  • Karma: 3
Re: Primary Chaincase Level plug thread
« Reply #1 on: 24.02. 2020 16:51 »
I would expect it to be 1/4" Whitworth.
On the plunger it's a 67-1711 BSW 1/4" x 1 5/8"  20tpi according to the wonderful A10 fasteners list from Steve Nott www.stevenott.com/bsatrinbw.htm
This is absolutely invaluable and it looks like his home page no longer works., so it's anybody's guess how long it will be around for.
Adrian
Logged
'53 Plunger Flash and Steib S500, ‘66 LE Velocette, ‘53? Winged Wheel

Offline A10 JWO

  • Resident Legend
  • *****
  • Join Date: Oct 2012
  • Posts: 730
  • Karma: 2
Re: Primary Chaincase Level plug thread
« Reply #2 on: 24.02. 2020 18:14 »
I got new ones from Draganfly last year, they fitted fine if that helps.
Logged

Online JulianS

  • 1962 A10
  • Wise & Enlightened
  • *
  • Join Date: Mar 2017
  • Posts: 1455
  • Karma: 29
Re: Primary Chaincase Level plug thread
« Reply #3 on: 24.02. 2020 19:03 »
15 645 is a common 1/4 x 26 tpi cycle (BSF fits)
Logged
Pages: [1]   Go Up
« previous next »