A quality strong stainless steel threaded anchor fitting for wooden spearguns. Coarse threaded exterior for biting into wood, with a fine threaded interior for metric parallel screws. Price is per insert.

M4 = 4mm internal thread diameter thread, length 15mm. Will suit metric M4 bolts on our website.

Perfect for wooden speargun builds or modifications when an often removed fitting is required, eg reels.

When used with epoxy glue, provides a permanent waterproof fixing for wooden spearguns, far superior to a self tapping screw.