Update on project....

[davjed]

A few weeks ago I posted about buying a parts assortment (Hope I didn't make a mistake) off of Gunbroker. Talk about a mismash (and mismatch) of parts. Of the six barrels one was .30 and shot out as were 4 of the remaining 9mm barrels. One barrel is in good shape with sharp rifling (#3719a). The lower frame is intact but pitted quite badly on the front and rear straps and the sides. The safety reads "rust" at the upper position. The serial number is pitted but the last three digits are _566. The upper receiver is a double date 1917/1920 crimped at the top front. It's number is 6594. The best toggle assembly is plain and not numbered. I have ordered a coil spring kit from Wolf Springs and all the flat springs are present as well as other small parts. I will need a front sight and part of the safety component. My problem is that the barrel will not screw in all the way and the begins to bind and gall after several turns. It looks like the receiver threads need to be chased. My question is, what is the correct die size to use on them. The appear to be 5/8 x 20 but I want to be sure they are not metric before I go any further. I plan to install the barrel then head space and test fire it. If that goes well I will have it bead blasted and refinished. Any thoughts or suggestions are appreciated along with the thread size.