One pair of glossy black reproduction Eaton gas caps with 5/16" tall knurls which are common to the 1942-1952 Harley Davidson twin models with split fat bob tanks.  Both caps are vented so these will fit the right and left tank on 1936-1964 models.  Will fit the right tank up through 1972 and will fit Sportster tanks from 1959 to 1969.  

Civilian models manufactured from roughly mid-late 1942 to early 1946 had gloss black caps.  Can be used on big twin or 45” models (Left or gas cap only on 45 models). These DO have the Eaton hallmark under the bung like the chrome ones we sell.  Please double check your tanks prior to ordering, many aftermarket tank sets use the 1965 and up style bungs with different bayonet depths from the right to left.  From 1936 to 1964, original H-D big twin tanks used the same vented cap on the right and left as illustrated in the last photo above.

We do sell a less expensive black cap set which does not have the Eaton hallmark under the bung, as well, it has a noticeable band around the upper edge of the cap.  This set is a much more original appearing cap for the period.

If you are restoring a war era Knucklehead, UL, WL, WLA, or WLC, we sell many parts with correct war-era finishes including exhausts, oil lines, shift rods, shift rod ends, plain head and CP-1035 bolts as well as hundreds of other hardware items.

We do offer 1965 to 1972 style caps as well as 1972 and up in our store under separate listings as well as parkerized caps and exact reproduction 1936-1938 chrome caps, 1939-1952 caps and 1953-1964.

These are vented.

Fits the following models:
  • 1936-1947, 61" & 74" OHV Knucklehead, E, EL, F, FL, ELA
  • 1948-1964, 61" & 74" OHV Panhead, E, EL, F, FL, FLH
  • 1937-1948 74" & 80" SV Flathead U, UL, UH, ULH, UA
  • 1937-1952 45" Solo W, WL, WLD, WLA, WLC (gas cap only)
  • 1937-1973 45" Servicar G, GE (gas cap only)
Please check my eBay store for CP-1035 and CP-1038 hardware, parkerized clamps & clips, speedometer drives, decals, tank emblems, and other odds and ends for your vintage Harley project.

A NOTE ON SHIPPING:

If you would like to take advantage of our combined shipping discounts or shipping promotions, please first add all your items to your shopping cart then proceed to check out and pay for all items at once.  Your shipping discount will be automatically figured.  Should you need to add an item, we will combine it with your other purchases and issue an appropriate refund to your PayPal account.

We work with a small and select group of vendors and dedicated craftsmen to bring you the very best restoration and repair parts for 1915 to 1984 Harley-Davidson motorcycles.  We also offer a huge collection of restoration quality plain head, CP-1038, & CP-1035 bolts; fillister head & round head screws; correctly machined nuts & washers; fuel & oil lines; wiring harnesses; handlebar switches; air cooled spark plugs; clips, clamps, and ties in cadmium, parkerized, zinc, chrome, and raw finishes.