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Posted 20 hours ago

Sealey Sx010 Impact Socket 52Mm 1/2Sq Drive

£8.745£17.49Clearance
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ZTS2023
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About this deal

Coarse threads (whitworth,unc etc) are more likely to be used on the thread in a casting(especially aluminium) to give greater strength,most nut and bolt assemblies will use a fine thread,so studs in castings often have a coarse thread end to go in the casting and a fine end to take a nut. Whitworth,BSF,metric and imperial spanners are based on different standards and hence sizes,with few exceptions they are not interchangeable. Pre 60s Whitworth is more likely,unified threads started replacing BSW and BSF from the early 1950s but the change was spread over many years in some cases. S.F (British Standard Fine) spanner refers to thediameter in inches of the threaded portion on the bolt it fits. Both Whitworth and British Standard Fine were phased out by the 1960s,but some manufacturers carried on usingboth on applications much later than this.

HEY presto 5mins I had 52mm socket but still have the 55mm undamaged worked a treat-------- job done. BA spanner and socket sizesin incheswithmetric(mm) equivalents BA (British Associated) is an early British standard often found on dynamos,magnetos,distributors,starters and electrical fittings and connections on older British cars and motorcycles .The tapered hex design makes precise fits possible in hard-to-reach locations, while the parallel shank expands and closes flat for use in tight spaces. A.F means Across Flats and indicates the distance apart the jaws are on an open end wrench (or the parallel sides on a nut or bolt. This is not strictly correct,although some will loosely 'fit' the thread angle on Unified threads is 60 degrees against the55 of Whitworth. Sounds like my Dad and his SII Landy, he carried enough spares and tools for a roadside rebuild I remember him changing the front exhaust downpipe in the carpark at Saunderfoot while we were on the beach. If youknow if the thread is fine or coarse and when the item was made it will help work out what size the original fitting is.

All the commonly used spanner and socket sizes,from10BA up to 60mm with their decimal inch equivalents. You can use the abovechart (and the AF/metric chart below) to find equivalents for some missing tools. This was another standard introdued to try and rationalise the sizes of smaller fixings,and which now confuses greatly the metric spanner wielding enthusiast. This versatile device is suitable for use with bearings mounted on an adapter or withdrawal sleeve, as well as on a tapered journal.Long time ago, My xk150 SU petrol pump packed in, A couple of new replacements didn't last more than a few weeks, Used to keep on the move when they stopped working by leaning out of the drivers door, reaching under the sill and giving the pump a good smacking with my hand, And that would get me another half mile or so, When they wouldn't change the faulty pumps anymore. replaced it with a piece of plastic and no more trouble, The pump was one with a square body and fitted with a short rubber breather tube. This was in the days when Great Britain had a large manufacturing base and didnt simply import cheap junk from the far east. This standard was introduced asthe 'new' standard around the 1940sto replace BSW and BSF etc and was supposedly phased outby the 1970's in favour of metric threads and sizes.

Measuring your lock nut ensures you're using the correct socket and tools, making mounting and dismounting hassle-free. Commonly used Whitworth/BSF threaddiametersand the mm or imperial (inch) size of the wrench opening (across flats)to fit nut or head. B.A (British Association) are smaller sized fastenings found on older vehicles electrical fittings,magnetos,dynamos,motors,pumps and instruments etc.Imperial AF spanners are normally used on nuts and bolts threaded UNC or UNF (Unified Coarse or Unified Fine) and use a thread angle of 60 degrees. British Standard fine is in effect the fine version of whitworth with the same thread form but with a greater number of threads per inch. For greater control, you can insert a power tool or torque wrench through the 1/2-inch connection hole. A tubular box spanner or six sided socket thenext size up might be a solution when the correct size is not available (ie) a 19mm spanner will probably undo a 3/4 inchaf nut. It is very common to find an older car or bikethat left its maker witha mixture of imperial and metric nuts and bolts holding it together.

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