Hi Guys just trying to do the arms on my 2004 l322

If you are asking of the ball joint thread... Type Ball Joint. External Thread Size M14 x 1,5. LAND ROVER RBK000010 . I you want the tread of the retaining torx screws they are M10 x 20mm. If you are changing the retaining torx screws do yourself a big favour and get normal hex head bolts, it will make your life so much easier especially if the new ball joint is a very tight fit.

 2007 TDV8 VSE
2003 TD6 gone.
2002 P38a gone
1999 P38a gone
1997 p38a gone
1993 VSE gone
1992 VSE gone
1966 Series 2a with V8 conversion gone

sounds like a good idea, just got to get them out first

I have done this now on 4 cars and even in Australia with zero rust they have all been a pain to get out hence replacing with proper bolts to press the new in. On the earlier pre facelift cars getting the balljoints out and in proved a real task as they were so tight, on two facelift cars they came out and went in with ease, not sure why a difference. 2007 TDV8 VSE
2003 TD6 gone.
2002 P38a gone
1999 P38a gone
1997 p38a gone
1993 VSE gone
1992 VSE gone
1966 Series 2a with V8 conversion gone