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Where to get S/B Lag Screws?
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- Mark Christensen
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Where to get S/B Lag Screws?
I'm trying to locate silicon bronze lag screws. Or do people use another metal for the lag screws in the bottom frames because you can't seem them once the bottom is on? They don't have them at ccfasteners?
Mark
Mark
1961 24' Chris Craft Sportsman - CUA-24-0007C
1940's Homebuilt 14' Racing Hydroplane
1940's Homebuilt 14' Racing Hydroplane
- Mark Christensen
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ahhh, i found them on ccfasteners finally. I'm not sure what size the lag screws are though for a typical 17' prewar deluxe. I know the length, but not the diameter. I'm not sure how they measure those. Anybody?
Mark
Mark
1961 24' Chris Craft Sportsman - CUA-24-0007C
1940's Homebuilt 14' Racing Hydroplane
1940's Homebuilt 14' Racing Hydroplane
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Mark, i have the material supply list for your boat. Every size nut, bolt and screw for the whole boat. It will not allow me to post on the forum. I got it from from Bill years ago, so it is probably posted on the Archive.
Patrick
Previous projects: 1940 17' Barrelback, #71572
1971 XK19, ORCZ19-2016V
New project: Looking???
Previous projects: 1940 17' Barrelback, #71572
1971 XK19, ORCZ19-2016V
New project: Looking???
- Mark Christensen
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hmmm. Lag screws I mean. I always considered lag screws and lag bolts the same thing . The pictures you posted I call those carriage bolts.
these are for the frames that tie into just the chine, not any topside frames. When I removed them, they had a (phillips style, r/p, frearson whatever) head on them. I was going to replace them with lag screws because i can get a ratchet on them better than i can tighten them with the r/p style head.
Mark
p.s. good lord that bilge is immaculate.
these are for the frames that tie into just the chine, not any topside frames. When I removed them, they had a (phillips style, r/p, frearson whatever) head on them. I was going to replace them with lag screws because i can get a ratchet on them better than i can tighten them with the r/p style head.
Mark
p.s. good lord that bilge is immaculate.
1961 24' Chris Craft Sportsman - CUA-24-0007C
1940's Homebuilt 14' Racing Hydroplane
1940's Homebuilt 14' Racing Hydroplane
- Don Ayers
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Mark;
That is the work of Jim Blake. A perfectionist for sure.
You do not need to use a lag. That is wrong on several levels.
1. Not correct construction
2. You will be using adhesives when going back and the joint will be stronger than ever with a screw.
3. If you think you can't get incredible hold out of a #14 bronze screw you need to think again.
4. The screw is going to have the proper shank and angle on the head for correct holding power. A bolt will have no angle under the head and your countersink will be incorrect.
5. the reconstruction of your boat should not be made with tremendous forces being applied to the fasteners to horse things together.
I could go on and on. Slow down and don't try to reinvent the construction methods.
IMHO
That is the work of Jim Blake. A perfectionist for sure.
You do not need to use a lag. That is wrong on several levels.
1. Not correct construction
2. You will be using adhesives when going back and the joint will be stronger than ever with a screw.
3. If you think you can't get incredible hold out of a #14 bronze screw you need to think again.
4. The screw is going to have the proper shank and angle on the head for correct holding power. A bolt will have no angle under the head and your countersink will be incorrect.
5. the reconstruction of your boat should not be made with tremendous forces being applied to the fasteners to horse things together.
I could go on and on. Slow down and don't try to reinvent the construction methods.
IMHO
- Mark Christensen
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Lag bolts
Now I'm confused. I thought lag bolts had wood screw threads on one end and machine screw threads on the other. Wrong ?
Wilson Wright
Executive Director Emeritus
Chris-Craft Antique Boat Club
Executive Director Emeritus
Chris-Craft Antique Boat Club
- Mark Christensen
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- Brian Robinson
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Lag bolts
Brian:
I guess I am, but I never heard it called that. I thought you used lag ( hanger ?) bolts to screw into the keelsons and then hold the engine block down with bolts and washers on the threaded ends.
I guess I am, but I never heard it called that. I thought you used lag ( hanger ?) bolts to screw into the keelsons and then hold the engine block down with bolts and washers on the threaded ends.
Wilson Wright
Executive Director Emeritus
Chris-Craft Antique Boat Club
Executive Director Emeritus
Chris-Craft Antique Boat Club
Lag bolt and lag screw are the same thing. They are just a giant screw with a hex head (today) and square head (in the olden days). I use 'em all the time in timber connections. 3/4 inch diameter x 20 inch long is not unusual.
Thompson Bros. Boat Mfg. Co. used lag screws to attach the lifting ring base to the stem on 1950s and 1960s lapstrake boats.
Andreas
Thompson Bros. Boat Mfg. Co. used lag screws to attach the lifting ring base to the stem on 1950s and 1960s lapstrake boats.
Andreas
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