In article ,
T. Keating wrote:
...snipped...
Presuming you have some extra thread left over or use slightly longer
lag bolts. Purchase or have specially made, some reverse threaded
7/16" nuts.

Install reflector using normal lag bolt, washer and nut.
Then install second reverse threaded nut after first.

When two nuts.. meet.. Tack weld them together..
No mater which way they turn the double nut assembly it won't move.

To remove, grind off tack weld, back off each nut appropriately.
Lag threads will remain intact and undamaged. .

Not that funny.



--
Make it as simple as possible, but no simpler.

Larry Wasserman - Baltimore Maryland - lwasserm(a)sdf. lonestar. org