Silicon Bronze screws

[Nhwhite]

My 40' Penobscot Trawler 1969 was refastened ten years ago; On a recheck of the garboard plank screws considerable wasting was noted on the fastening where the plank meets the rib [cedar on oak]. The screws on the planks above the garboard were in better shape.WHat gives? I thought these screws should last twenty years.Would appreciate coments'

[Thaddeus J. Van Gilder]

Fort Lee, ehh?

down here around Ocean City, many of the boatyard guys don't know the difference between a yellow brass screw and a silicon bronze screw.

Even the ones that somehow learned to replace planks often can't figure out how to correctly fasten them.

-THad

[JimD]

I agree with Thad, wonder if its really silicon bronze fasteners you've got there. Real ones should last longer as you say.

[Scott Rosen]

Sounds like you have a combination of leaky garboards and serious galvanic corrosion. Could be that the refastening job wasn't done to the best level of skill. Maybe you needed a recaulking, too. It's also possible that you needed more structural work than a refastening. First you need to figure out why there's water between the garboard and the frame.

[Ken Hutchins]

I hope this isn't an indication of more problems with 'silicone bronze' screws from Asia. :( Is there any way you can find out the source of those screws?

[Mr. Know It All]

Boat building Silicone bronze screws ain't cheap but you can get the real deal from here-->
http://store.yahoo.com/squaredrive/fasteners-screws-flat-head-silicon-br onze-boat-building-screws.html (http://store.yahoo.com/squaredrive/fasteners-screws-flat-head-silicon-bronze-boat-building-screws.html)

Made in china. Marine grade alloy 651

[ 05-04-2003, 06:28 PM: Message edited by: Mr. Know It All ]