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Posted by Tom on January 27, 2008, 2:41 pm
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jontom_1uk@hotmail.com wrote:
>
>>Tim Leech wrote:
>>
>>>wrote:
>>
>>>>campingstoveman wrote:
>>
>>>>>Gentlemen,
>>
>>>>>Can anyone tell me the tapping size of a 11/16ths UNF tap, I know its a
>>>>>bastard size, I have bought a tap but none of my books give a drill size for
>>>>>it.
>>>>>Its for Landrover track rod ends.
>>
>>>>>Martin P
>>
>>>>MH gives, for 1-1/2D to 3D depth of engagement as between 0.651-0.655"
>>>>so 21/32" drill is pretty close @ 0.65625"
>>
>>>>Tom
>>
>>>What is the pitch? 5/8" is 18 tpi, 3/4 is 16.
>>
>>>I've got an 11/16" UNS tap, 16 tpi, in my hand which is marked 'use
>>>5/8" drill'.
>>
>>>Tip
>>
>>Missed the UNS, not UNF is it? :-)
>>
>>Tom- Hide quoted text -
>>
>>- Show quoted text -
>
>
> Tom
>
> Yes, I think it should be UNS at 16TPI, at least that is what the
> LR4X4 forum thinks it is. I suspect the chart I quoted was actually a
> missprint and called it UNF instead of UNS. It is also a fairly common
> size used on some plumbing fittings so I suppose it could be called
> "special". As UNS it is listed fairly often with the tapping drill at
> 5/8", as of course is 11/16UNEF at 24TPI with a tapping drill of
> 16.6mm.
>
> Regards
>
> Keith
>
Well everyone is in on the act. I made some shackle pins the other day
for the roller I'm playing with and just to be different they had a 5/8"
16 tpi thread, instead of 14 tpi which is the standard for 5/8" BSF.
Tom
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