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Triumph TR6 - HELP...fasteners

Rimmer Bros, Restorations and for that matter TRF all have an extensive listing of various fasteners used on the TR6, but I've been unable to find a listing by application of the fastener specs. What I'd like to see is a listing of bolts, screws, nuts washers etc by size and description and APPLICATION, that is...10-32 hex head, 3/16th, 5/8 long, used as the scuttle vent retaining screw. Anyone have such a listing or might have any idea of how to reasonably quickly discover spec on particular fasteners. I ask because I have discovered a HUGE price difference in the regular sources and my local hardware store. Even ss fasteners are 20 to 90% less expensive that the regular sources. I can look up every nut, bolt or screw I need by part number from the exploded drawing, but even then they are not always decribed sufficiently to source elsewhere.

Thanks.
db
Doug Baker

If you check the website http://www.vtr.org/maintain/nuts-n-bolts.html there is a guide to interpreting the nuts and bolts codes.

Nelson Reidel did post a listing of all the stainless steel nuts and bolts by size length etc. I couldn't find it on the website though.

I did copy it off when I found it though and if you email me at siddotturner@telusdotnet ... replace the dot with a . and I will email the 2 files, excel and word.

SID
Sid Turner

Doug,

I can't really help you with a listing by specific application, but there is a way to interpret the fastener sizes out of the factory part numbers such those used by Roadster for hex head set screws, bolts, nuts and washers. They use letter codes, the head size in 1/16" increments and the fastener length by 1/8" increments. Note that unless otherwise specified, all threads are UNF. There probably is a similar way of interpreting on other stuff, but I haven't bothered with trying to figure it out.

Examples:

1/4" set screw (i.e. head headed fastener with threads all the way to the head) and 5/8" long is an HU705. The HU indicates set screw, 7 indicates that the head is 7/16" and the 5 indicates that it is 5/16" long. Add a P to the end if it is a pointed fastener such as those used for the fuel tank, that would be the HU706P.

5/16" bolt (i.e. has grip length and is only partially threaded) that is 1 1/4" long would be HB810. Here the HB indicates bolt, the 8 indicates a 8/16" or 1/2" head and the 10 indicates 10/8" or 1 1/4" long.

3/8" regular nut would be HN2009, where the HN identifies it as a regular nut and the 9 indicates a 9/16" inch hex.

3/8" regular height nyloc would be YN2909, 3/8" thin nyloc would be TN3209.

Plain washers are WPs, lock washers are WLs, etc.

The primary problem is that the SAE standard fasteners that you typically find are only in 1/4" length increments and you are also tied to set screws in many cases. That is not a good idea for applications where the fastener is in shear loading. Even at the TR specialists sources, you often find that the selection of 1/8" increment fasteners is getting slim.

I have found that going the AN/MS route is not really any more expensive than going the local source route. I have compared prices between the hardware store, from invoices of bulk purchase at a local fastener distributor and my invoices from Aircraft Spruce. Much to my initial surprise, the stuff from Spruce was the same price or less than the stuff from the fastener distributor and less than the hardware store for better stuff.

Go to the Aircraft Spruce website and request one of their catalogs (either aircraft or performance parts). You CAN get real stuff, in 1/8" increments where you get to select the grip lengths, you get thick (AN960), thin (AN960L) and fender type (AN970) washers that are really sized for the application, no more sloppy fitting washers, screws with proper 100 degree countersinks, high temp lock nuts, etc. It's not hard, their tables make it pretty easy to figure out what you need to get. I bet if you placed an order with them tomorrow by 2 in the afternoon, they would have it to you in AL out of the Peachtree City GA warehouse by Friday or Monday. From where I am, I typically get stuff from them the very next day. So check them out and raise your glass to the use of proper hardware.
SteveP

Thanks Steve,
As usual, your explanation is thorough and understandable. With the listing Sid referred and Aircraft Spruce, I should be able to get everything I need. The problem initially was that I was missing hardware. To replace what's there is an easy matter of simply observing the size etc and replacing it, but when there's a hole and the parts explosion only had a part number w/o your explantion, my only choice was to purchase from the TR source.

BTW, had a wonderful end of year (delayed from December) blind tasting last night with a couple of McCallans (12&15 yo), Springbank, Scapa, Glen Ord and Coal Ila. Was a real treat!
Doug Baker

Has anyone every got any fasteners from this place:
<a target=_blank href="http://www.rustfreeroadsters.com/">http://www.rustfreeroadsters.com/</a>

Thanks.
JDB Boyea

JDB,
I have no experience with this source, but did see early efforts to turn this supplier's experience into a business venture. The story he told was that seeking a full replacement set of fasteners for a TR6 restoration, he met with a paucity of sources, so devised his own and then decided to market what he had learned. Seems that he has expanded operations quite a bit since then. May be worthwhile. Maybe someone else on the BBS has had contact with him and can comment on quality etc.
db
Doug Baker

This thread was discussed between 11/01/2005 and 12/01/2005

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