1 1/4" Black Oxide screw with lock nut. Sold by the dozen.
1 1/4" Vintage Style Fender Speaker Mounting Screws with Wood and Machine Thread (lock nut included). This type of screw was used on Blackface and Silverface Fender amps. Screwed in from the front of the speaker baffle, the wood threads bite into the wood and hold it in place. The speaker is held onto place using the machine threads and lock nut.