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Boat Forum / Building / May 2007Need Name Of (Shackle?)
I'm trying to buy a few more of these things. I guess it's some sort of shackle... but don't have a clue beyond that. Can anybody put a name on it? http://www.flickr.com/photos/48262653@N00/488580505/ or http://tinyurl.com/229vlr  SignaturePeteCresswell :I'm trying to buy a few more of these things. :I guess it's some sort of shackle... but don't have a clue beyond :that. :Can anybody put a name on it? :http://www.flickr.com/photos/48262653@N00/488580505/ :or :http://tinyurl.com/229vlr A swivel snap hook. David Scheidt inscribed in red ink for all to know: > :I'm trying to buy a few more of these things. > [quoted text clipped - 10 lines] > > A swivel snap hook. Try a tack shop - one for horse/harness gear. bob Per David Scheidt: >:I'm trying to buy a few more of these things. > [quoted text clipped - 10 lines] > >A swivel snap hook. Now *that* was quick. Thanks Bob, thanks David. SignaturePeteCresswell Per (PeteCresswell): >>A swivel snap hook. > >Now *that* was quick. But it doesn't seem tb working Google-wise. I get hundreds of hits on 'Swivel Snap Hook' but they're all a single hook with some sort of bail to keep it from coming un-hooked - whereas the essential feature of the one I'm looking for is that there are two hooks that overlap when the thing is attached to something. viz: http://www.flickr.com/photos/48262653@N00/488669232/ Likewise "Snap Shackle" returns many, many hits - but none relevant. The only superficially-similar one is a trigger-release snap shackle which is sort of the opposite of what I'm looking for in that it is designed to release quickly and easily... whereas mine is inherently/intentionally difficult to release Only one I found so far is by a Chinese manufacturer who seems to lump them in with "Snap Hooks": http://tinyurl.com/298jly as in the large one on the upper right. SignaturePeteCresswell Peter Try www.mcmaster.com (McMaster Carr) enter number 3919T24 They call it a trigger snap. Matt Colie > Per (PeteCresswell): >>> A swivel snap hook. [quoted text clipped - 21 lines] > lump them in with "Snap Hooks": http://tinyurl.com/298jly as in > the large one on the upper right. :Per (PeteCresswell): :>>A swivel snap hook. :> :>Now *that* was quick. :But it doesn't seem tb working Google-wise. :I get hundreds of hits on 'Swivel Snap Hook' but they're all a :single hook with some sort of bail to keep it from coming :un-hooked - whereas the essential feature of the one I'm looking :for is that there are two hooks that overlap when the thing is :attached to something. :viz: :http://www.flickr.com/photos/48262653@N00/488669232/ It's a scissor snap, then. With a swivel. A harness shop should have them, as well as a large selection of other kinds of snaps. Try a google on "trigger snap" > I'm trying to buy a few more of these things. > [quoted text clipped - 8 lines] > > http://tinyurl.com/229vlr > I'm trying to buy a few more of these things. > [quoted text clipped - 8 lines] > > http://tinyurl.com/229vlr Sure looks like a "trigger safety shackle" used to connect an optimist mainsheet to the boom. optistuff.com or www.apsltd.com should have them. Jack It looks to me like a dangerous design. It would be all too easy for the load (or part of it) to fall on the moving piece. Dave > I'm trying to buy a few more of these things. > [quoted text clipped - 8 lines] > > http://tinyurl.com/229vlr I think that's called a 'scissor hook' > I'm trying to buy a few more of these things. > [quoted text clipped - 8 lines] > > http://tinyurl.com/229vlr Per Jim Conlin: >I think that's called a 'scissor hook' >I would not consider it reliable. Howcome? Seems like with snap shackles the bail can get squinched over and the whole thing can turn into just a hook. The attraction of this thing for me is that once it's attached to a steel ring and put under load, the scissoring of the overlapping hooks seems to guarantee that it won't work loose. All theory of course.... SignaturePeteCresswell Two reasons. If it's under load, it is held shut, but when shaken, i've seen 'em come undone. They're not as strong. A scissor hook or a snaphook is not 'closed,' meaning that one side is supported by the other, so it can open if it deforms enough. A pin shackle, a carabiner or a snapshackle may deform, but won't release untill the material breaks. > Per Jim Conlin: > >I think that's called a 'scissor hook' [quoted text clipped - 10 lines] > > All theory of course.... Definately a Trigger Hook. Depending on what you're using it for though, search for inglefield clips; they may be better for what you need. barry www.woodworking.wizkids.co.uk (also Royal Navy) Per barry@muckleshed.com: >Definately a Trigger Hook. Depending on what you're using it for >though, search for inglefield clips; they may be better for what you >need. Pretty slick: no moving parts.... But my application is for attaching tie down straps to a roof rack. The trigger snaps work well for that because they can be easily operated while somebody is standing on tip-toe with arms fully extended. Spontaneous release does not seem tb an issue once they're under tension. Only caveat I've experienced so far is that it's possible to clip them on is such a way that they're not fully closed - probably because the ratio of jaw size to the size of the ring they're clipping to is too small. SignaturePeteCresswell Per Jim Conlin: >I think that's called a 'scissor hook' Bingo! "Scissor Hook" consistently returns good hits. Thanks. SignaturePeteCresswell Per (PeteCresswell): >Bingo! "Scissor Hook" consistently returns good hits. As does "Trigger Snap"... which seems more specific. SignaturePeteCresswell I would call it a Widowmaker. Im not sure why a person would use it on a boat when there are so many other "safer' choices. Bob |
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