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  #1  
Old 28-10-17, 07:06
Lynn Eades Lynn Eades is offline
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Default Carrier Fasteners

I have a couple of questions:
I pulled some bits of a Canadian hull (U.C.MkI*)
The bolts were the usual BSF threads, but they were hybrid fasteners in that the hex sizes were made to UNF / UNC (USA) spanner sizes.
Was this std. practice right through Canadian Carrier production?

Question two.
I have a quantity of BSF (carrier original bolts) with three "C" evenly embossed on the heads.
Anyone know the origin of these? Canadian, or a particular British manufacturer?
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  #2  
Old 28-10-17, 14:58
rob love rob love is offline
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I am working on a Cdn carrier at work now, and there are a few bolts and nuts, primarily in the suspension, that are not the standard sizes. I ahve had to use metric wrenches to get a better fit. But as you mentioned, the hardware for the hulls are almost all North American heads.

There was a Cdn Army slideshow (I have it on VHS somewhere) on the Cdn carriers warning that the nuts and bolts holding the firing rest over the division plate could be either BSF or UNF from the factory.
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  #3  
Old 29-10-17, 21:50
Dave Schindel Dave Schindel is offline
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I have run into a few BSF fasteners that required metric wrenches for a proper fit as well. unfortunately I do not know exactly which locations they were used in. This was on a Canadian MKII.
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  #4  
Old 30-10-17, 03:49
rob love rob love is offline
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In the vehicle tech basic tool box, we were (and they likely still are) issued a couple of oddball sizes that nobody could figure out why. They were 19/32 and 25/32. We had open end, box end and sockets. Turns out they do work on some of the BSF fasteners, and I have also seen reference to them in the weather-head catalogue for some of their brass fitting sizes. One of those also fits perfectly on the alemite button head grease fittings used on the carriers.
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  #5  
Old 30-10-17, 08:11
Lynn Eades Lynn Eades is offline
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Hi Rob, I think you will find that there are 4, 32nd sized sockets in a std., complete (is there such a thing?) American socket set (3/8" to 1 1/4", 1/2 inch drive). They equate to the British std. sizes, without saying so.
Example: 19/32" is the size for 1/4"BSW and 5/16"BSF. (BSW has a larger hex than BSF, for a given bolt dia.)
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Carrier Armoured O.P. No1 Mk3 W. T84991
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
Dodge WC55. 37mm Gun Motor Carriage M6
Jeep Mb #135668
So many questions....
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  #6  
Old 30-10-17, 13:12
rob love rob love is offline
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Lynn

I am sure that is why the sizes were there, but they have now pretty much gone into obsolescence. I remember the snap on dealer, almost 20 years ago, asking why our purchaser was trying to get these oddball sizes, and that snap-on didn't carry some of the combination wrenches any more. It seems to me they coupled some of the 32ths sizes with the 11/16 size.

There is a thread on the HAMB about these sizes......many of the guys confessed to having a drawer full of them, but have never used them.

That is also likely the reason so many weatherhead brass fittings get rounded off.
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  #7  
Old 04-11-17, 19:49
Dave Schindel Dave Schindel is offline
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OK, so that explains a few things. I recall my dad had a wrench in his assortment that was I believe 25/32 and I could never figure out what it was for.
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  #8  
Old 04-11-17, 21:45
Lynn Eades Lynn Eades is offline
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So what of the bolts.
For example; Some of the nuts with the big countersunk screws holding the front tow eyes (all 7/16"BSF threads) are large nuts( std BSF sized= British carriers?) and some smaller nuts, that fit an American sized 3/4" spanner (Canadian Ford?)
I have 5/16" BSF (threaded) nuts and bolts, which require American 1/2" tools.
These I believe are original Canadian (U.C.MkI*) Ford factory fasteners.
I am looking to hear from others that have come across these "hybrids".
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Carrier Armoured O.P. No1 Mk3 W. T84991
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
Dodge WC55. 37mm Gun Motor Carriage M6
Jeep Mb #135668
So many questions....

Last edited by Lynn Eades; 04-11-17 at 21:46. Reason: clarity
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  #9  
Old 05-11-17, 02:00
rob love rob love is offline
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Over here we don't consider them hybrids....it is all we have ever seen. The 3/4 nuts on the 7/16 screws holding the front eyes are unusual to us, since normally that size would use either a 5/8 size nut, or more commonly a 7/16 nut. !/2 inch is indeed the size we use for 5/16 threaded fasteners.

Very few (to none) of the bolt heads on the Cdn carriers have any head markings that I can recall either.
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  #10  
Old 05-11-17, 06:45
Lynn Eades Lynn Eades is offline
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Thankyou Rob. That has shed some light.
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Carrier Armoured O.P. No1 Mk3 W. T84991
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
Dodge WC55. 37mm Gun Motor Carriage M6
Jeep Mb #135668
So many questions....
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  #11  
Old 05-11-17, 09:16
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Mike Kelly Mike Kelly is offline
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Default spanner

I have always used a spanner that fits .

I don't give a hoot what the numbers on the spanner mean
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