GCR Class 5A

{{Use dmy dates|date=January 2017}}

{{Use British English|date=January 2017}}

{{no footnotes|date=February 2015}}

{{Infobox locomotive

| name = GCR Class 5A
LNER Class J63

| powertype = Steam

| image = Immingham Locomotive Depot geograph-2378222-by-Ben-Brooksbank.jpg

| alt =

| caption = No. 8208 at Immingham engine shed in 1947

| designer = John G. Robinson

| builder =

| ordernumber =

| serialnumber =

| buildmodel =

| builddate = 1906–1914

| totalproduction = 7

| rebuilder =

| rebuilddate =

| numberrebuilt =

| whytetype = {{whyte|0-6-0|T}}

| uicclass = C n2t

| gauge = {{track gauge|ussg}}

| driverdiameter = {{convert|3|ft|6|in|m|3|abbr=on}}

| minimumcurve =

| wheelbase = {{convert|12|ft|0|in|m|2|abbr=on}}

| length = {{convert|26|ft|11.5|in|m|2|abbr=on}} over buffers

| width =

| height =

| axleload =

| weightondrivers =

| locoweight = {{long ton|37|9}}

| fueltype = Coal

| fuelcap = {{long ton|1|10}}

| watercap = {{convert|950|impgal|sigfig=3|abbr=on}}

| sandcap =

| boiler =

| boilerpressure = {{convert|150|psi|MPa|2|abbr=on}}

| feedwaterheater =

| firearea = {{convert|11.43|sqft|m2|abbr=on}}

| tubearea =

| fluearea =

| tubesandflues =

| fireboxarea =

| totalsurface = {{convert|590|sqft|m2|abbr=on}}

| superheatertype =

| superheaterarea =

| cylindercount = Two, outside

| cylindersize = {{convert|13|x|20|in|mm|0|abbr=on}}

| valvegear =

| valvetype =

| valvetravel =

| valvelap =

| valvelead =

| transmission =

| maxspeed =

| poweroutput =

| tractiveeffort = {{convert|10260|lbf|kN|2|abbr=on}}

| factorofadhesion =

| trainheating =

| locobrakes =

| locobrakeforce =

| trainbrakes =

| safety =

| operator = {{ubl|Great Central Railway| → London and North Eastern Railway| → British Railways}}

| operatorclass = {{ubl|GCR: 5A|LNER: J63}}

| powerclass =

| numinclass = 7

| fleetnumbers =

| officialname =

| nicknames = Dock Tanks

| axleloadclass =

| locale = Immingham & Mersey Docks

| deliverydate = 1906-1914

| firstrundate =

| lastrundate =

| withdrawndate = 1953–1957

| preservedunits =

| restoredate =

| scrapdate =

| currentowner =

| disposition = All scrapped

| notes =

}}

The GCR Class 5A was a class of seven {{whyte|0-6-0|T}} steams designed by John G. Robinson for work in docks operated by the Great Central Railway.{{sfn|Goode|1985|p=54}} They passed to the London and North Eastern Railway at the grouping in 1923 and received the LNER classification J63.