You are purchasing a USA-made primary cover screw kit consisting of a set of parkerized 10 OEM# 037 or 1211 (10-32 NF x 5/8”) primary cover screws, 10 OEM# 0254 or 7021 #10 parkerized lock washers, as well as 10 derby inspection cover screws OEM # 048A or 2268 (12-24 NC x 1/2”) oval head straight slot screws. These are 10-32 NF x 5/8” filister head straight slot screws used on the primary covers from 1936 to 1964. straight slot screws are “correct” through 1949 according to Bruce Palmer in his How To Restore Your Harley Davidson book, he suggests they changed to Philips drive filister head screws in 1950. We do offer Philips head filister screws in a parkerized or cad finish on other listings as complete primary kits in our store.
Parts catalogs show the 3/8” long 048/2265 screw used on the derby covers for big twins. You simply cannot get enough bite with the thick cork gaskets the derbys use. If you need/want some NOS 048 or 2265 screws I’ve got them in my eBay store.
The cad plating and parkerizing is perfect.
Will fit any un-modified OEM and most reproduction sheetmetal or tin primaries for four speed kick start Harley big twins from 1936 to 1964 but are considered detail correct only up to 1949, please do your own research to make certain this is what you need:
- 1936-1947 E, F, EL, FL Knucklehead
- 1937-1948 U, UL, UH, ULH big twin side valve flathead
- 1948-1964 EL, FL, FLH Panhead but only considered to be a detail-correct item from 1950 to 1955 with the parkerized finish on the screws and washers
Please see our eBay store for many different individual pieces of hardware and hardware kits for your vintage Harley-Davidson as well as the correct primary cover screws for other year Harleys.
PLEASE NOTE: When it's practical, I will gladly combine all your purchases into one shipment for a discounted rate.
Ships first class or priority, your choice.
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.