Browsing the book on SB rebuild, I came across the picture of a grease fitting that fits my spindle and back shaft, Thing is it's a 1/4-20 thread. I can find 1/4-28 fitting or 1/2-20 fitting, nothing in 1/4-20. I am using a chainsaw bar greaser to inject grease into these two shafts, my imagination and creativity must be stunted, what are you guys using to grease your SB?