Hello Coilers: A good source for nylon bolts to secure toroids and mounting the secondaries of TC's is the nylon bolts sold at hardware stores for attaching toilet seats to the bowel. They are about 3/8" in diameter by 2 1/2" long. 73, Weazle, VE3EAR/VE3WZL Listening: 147.030+ and 442.075+ E-mail: weazle-at-hurontel.on.ca or ve3ear-at-rac.ca Web site: www.hurontel.on.ca/~weazle