Threaded inserts for deck

Xk59D · 04 March 2017, 17:04

Hey folks,

I need to get some inserts, I'm waiting on ullman getting back to me for their version below, has anyone seen these or similar anywhere in stainless?

These are circa 20mm dia and 28mm long FYI, something similar would do.

jambo · 04 March 2017, 17:10

Hi Paul I think Pikey would be a good reference point for you.

tamsbairn · 04 March 2017, 18:23

Quote:

Originally Posted by Xk59D

Hey folks,

I need to get some inserts, I'm waiting on ullman getting back to me for their version below, has anyone seen these or similar anywhere in stainless?

These are circa 20mm dia and 28mm long FYI, something similar would do.

these folk are good
Stewart

http://technifast.co.uk/uploads/file...sjgggsklr4.pdf

Xk59D · 04 March 2017, 18:28

Do they make inserts?

None in that sheet will do unfortunately.

I don't know how much the ullman inserts cost yet but I'm dreading to find out!

Maximus · 04 March 2017, 18:50

Quote:

Originally Posted by jambo

Hi Paul I think Pikey would be a good reference point for you.

Like Jambo says...He's your Man Mate.

Xk59D · 04 March 2017, 19:00

Cheers both, sent a pm to him

Phil M · 04 March 2017, 20:11

I only ever found ones in 304 stainless (eBay I think), but they seem to be holding out ok. Just be careful that you don't overload them as they are only as strong as a big screw in ply. Use plenty of them and we'll spread out.

Phil

Xk59D · 04 March 2017, 20:37

These are not like the ebay specials unfortunately, these things are huge to take the loads of a suspension seat. I can't find anything close to 20mm dia with M8 internal. I will also be bonding these with epoxy so I'm thinking will be plenty strong enough.

Im planning to use 8 or maybe 10 per seat. Ribcraft think Ullman only say use 6 per seat so I'm going more.

gtflash · 04 March 2017, 22:03

De Ja fun..... ulman seats have 6 fittings I believe.

As per previous thread, there are other threaded fixings that might be stronger. I really like the look of those fixings but if you google the non marine ones they seem to indicate they are for medium duty loads,

Just about to fix some suspension seats to my foam core deck next week, I'll be bonding M8 big head fastners into epoxy. Although I can't calculate the difference, the big head bonded in epoxy will have more surface area "grip" than the thread area of those male things.

Xk59D · 04 March 2017, 22:12

i'll answer you on the other thread bud as this one was purely to find these fasteners.

http://www.rib.net/forum/f8/ribcraft...tml#post741372

Phil M · 04 March 2017, 23:15

8-10 should do it. Just make sure the pilot holes are not too large. The shear area of the thread on the deck is key to strength and an oversized hope greatly reduces this. I did tests on similar inserts years ago in my Caterpillar days and prep was key to strength.

Call me cautious but is hate to see a seat come loose and cause an incident. I'm in the nuclear industry now and we're kind of against risk taking.

Phil

Xk59D · 04 March 2017, 23:37

Phil, safety is ofcourse something not to be taken lightly and it won't be.

the other thread i linked above has more fitting options.

i had the rib at a local boat place yesterday who fit seats/consoles on the MOD ribs at faslane, what they use in those is similar to what i'm going with here and they have been hammered for years those ribs. infact some of the MOD ribs have these exact fasteners.

Ian M · 05 March 2017, 08:40

Came across these the other day, only A2 (308), and I have no idea whether they will suit; never used them;
DRIVE IN NUTS FOR WOOD

Maximus · 05 March 2017, 09:10

[QUOTE=Xk59D;741371]i'll answer you on the other thread bud as this one was purely to find these fasteners
Other thread.

Xk59D · 05 March 2017, 09:30

Quote:

Originally Posted by Ian M

Came across these the other day, only A2 (308), and I have no idea whether they will suit; never used them;
DRIVE IN NUTS FOR WOOD

I've used these all my with my other hobby, they are not suitable for anything major load wise.

diver 1 · 05 March 2017, 13:29

Hello

I ordered exactly these same fasteners from Technifast - 316 stainless steel blind ended so water does not seep into deck cavity and with 2 sizes - M10 internal thread and M12 internal thread. Phone Technifast and ask to speak to John Garner.

I put a post up about these last summer including photos of how I installed them