Active Active   Unanswered Unanswered

Where to get S/B Lag Screws?

Bronze, stainless, chrome or steel. If you need information about the non-wood items on your Chris-Craft, pose your questions here.

Moderators: Don Ayers, Al Benton, Don Vogt

User avatar
Mark Christensen
Posts: 639
Joined: Wed Jul 19, 2006 5:57 am
Location: Rockford, IL
Contact:

Where to get S/B Lag Screws?

Post by Mark Christensen » Mon Mar 30, 2009 9:22 pm

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
1961 24' Chris Craft Sportsman - CUA-24-0007C
1940's Homebuilt 14' Racing Hydroplane
Image

Thommyboy
Posts: 188
Joined: Wed Dec 21, 2005 5:11 pm
Location: Minneapolis
Contact:

Post by Thommyboy » Tue Mar 31, 2009 6:57 am

try classicboatconnection.com or boltdepot.com

Andreas

User avatar
Mark Christensen
Posts: 639
Joined: Wed Jul 19, 2006 5:57 am
Location: Rockford, IL
Contact:

Post by Mark Christensen » Tue Mar 31, 2009 11:51 am

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
1961 24' Chris Craft Sportsman - CUA-24-0007C
1940's Homebuilt 14' Racing Hydroplane
Image

dustoff135
Posts: 184
Joined: Thu Aug 10, 2006 9:30 am
Location: Smyrna, GA
Contact:

Post by dustoff135 » Tue Mar 31, 2009 4:50 pm

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???

User avatar
Don Ayers
Club Executive Team
Posts: 1681
Joined: Tue Oct 25, 2005 3:05 pm
Location: Oklahoma
Contact:

Post by Don Ayers » Tue Mar 31, 2009 7:17 pm

Mark;

I think you might have your terminology incorrect. "lag bolts" were used in just a few places like engine, gas tank straps and front wood wedges. Are you talking about regular silicon bronze screws, bolts (for stringers) etc?
Image
Don Ayers
1959 Riva Ariston
www.RivaForum.org
www.barrelback.com

User avatar
Don Ayers
Club Executive Team
Posts: 1681
Joined: Tue Oct 25, 2005 3:05 pm
Location: Oklahoma
Contact:

Post by Don Ayers » Tue Mar 31, 2009 7:20 pm

my mistake. I was thinking you were talking about Lag bolts. see pic.

i.e. the square head kind.
Image
Don Ayers
1959 Riva Ariston
www.RivaForum.org
www.barrelback.com

User avatar
Mark Christensen
Posts: 639
Joined: Wed Jul 19, 2006 5:57 am
Location: Rockford, IL
Contact:

Post by Mark Christensen » Tue Mar 31, 2009 7:22 pm

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.
1961 24' Chris Craft Sportsman - CUA-24-0007C
1940's Homebuilt 14' Racing Hydroplane
Image

User avatar
Don Ayers
Club Executive Team
Posts: 1681
Joined: Tue Oct 25, 2005 3:05 pm
Location: Oklahoma
Contact:

Post by Don Ayers » Tue Mar 31, 2009 8:41 pm

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

Image
Don Ayers
1959 Riva Ariston
www.RivaForum.org
www.barrelback.com

User avatar
Mark Christensen
Posts: 639
Joined: Wed Jul 19, 2006 5:57 am
Location: Rockford, IL
Contact:

Post by Mark Christensen » Tue Mar 31, 2009 8:44 pm

10-4. I'll go with the original ones. Believe me i'm going slow. Most people think to slow. But hopefully RIGHT on track for mt. dora next year. :)
1961 24' Chris Craft Sportsman - CUA-24-0007C
1940's Homebuilt 14' Racing Hydroplane
Image

Wilson Wright
Posts: 559
Joined: Tue Oct 25, 2005 9:44 pm
Location: Tallahassee, Florida
Contact:

Lag bolts

Post by Wilson Wright » Wed Apr 01, 2009 9:35 am

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

User avatar
Mark Christensen
Posts: 639
Joined: Wed Jul 19, 2006 5:57 am
Location: Rockford, IL
Contact:

Post by Mark Christensen » Wed Apr 01, 2009 9:57 am

lag bolts and lag screws are the same thing. I'm not sure what you call a screw with wood/machine screw on each end. I bet they would be useful though!

Mark

p.s. Wilson were you at the Tavares show?
1961 24' Chris Craft Sportsman - CUA-24-0007C
1940's Homebuilt 14' Racing Hydroplane
Image

User avatar
Brian Robinson
Posts: 777
Joined: Thu Oct 27, 2005 10:49 pm
Location: Southern California
Contact:

Post by Brian Robinson » Wed Apr 01, 2009 11:09 am

Wilson, you are thinking of a hanger bolt.

Wilson Wright
Posts: 559
Joined: Tue Oct 25, 2005 9:44 pm
Location: Tallahassee, Florida
Contact:

Lag bolts

Post by Wilson Wright » Wed Apr 01, 2009 11:42 am

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.
Wilson Wright
Executive Director Emeritus
Chris-Craft Antique Boat Club

Thommyboy
Posts: 188
Joined: Wed Dec 21, 2005 5:11 pm
Location: Minneapolis
Contact:

Post by Thommyboy » Thu Apr 02, 2009 6:49 am

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

Post Reply

Who is online

Users browsing this forum: No registered users and 15 guests