Security Head Screws : Spanner Head
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These stainless steel screws have relatively uncommon screw-heads which may help deter casual tampering. They are "flat-head", are available threaded for wood or machine and come in either the thinner diameter no. 6 or the larger diameter no. 8.
Sold in bags of 100.
Disclaimer

These stainless steel screws have relatively uncommon screw-heads which may help deter casual tampering. They are "flat-head", are available threaded for wood or machine and come in either the thinner diameter no. 6 or the larger diameter no. 8.
Sold in bags of 100.
Disclaimer