I have a metalic enclosure sandwiched between RNC. I'd like to use a two-terminal landing lug to serve not only as my grounding means but to also splice the grounds (splicing SE cable to THHN). My question is: "Can I use standard bolts, lockwashers, and nuts to fix the lug to the enclosure or must I use some sort of listed components (i.e. specialized nuts, bolts, and washers)?". According to 250.8 (2002 NEC) the stuff must be listed but the folks that I've been talking to have said that standard hardware is good 'nough. My common sense says that standard hardware with lock washers should hold for eternity but I'd like more feedback. I've left messages for the local inspectors without a word back. Any help is appreciated.
By the way, if someone out there has had success with something other than a landing lug, please let me know -- Thanks.