Fastener description by part number?

[Nambo]

Now as a British Motorcycle restorer, about the most useful online resource is this:- http://stainlessbits.com/link12.html

Every nut and bolt is described by part number.

My Stag was taken apart by somebody else, and now with a big box of nuts and bolts, and only logic to tell me where they go, it would be so nice to read a part number, say from the Rimmers catalogue, and be told what sort and size of fastener it is.

Does such exist?

[Goldstar]

IIRC the ROM has a lot of them listed although by description not part no. Guess you could x ref the part no from the catalogue? Rimmers also gives measurements if you drill down into the part description I think

[Nambo]

IIRC the ROM has a lot of them listed although by description not part no. Guess you could x ref the part no from the catalogue? Rimmers also gives measurements if you drill down into the part description I think

Whats the Rom, a CD?, who will sell one to me please?

[jleyton]

Hi Nambo (do we have a real name for you ?),

It doesn't seem to be widely known, but all Triumph part numbers for nuts, bolts and washers tell you exactly what the component is and what its size is. Below, I'm reproducing a chart to guide you. In later years, BL introduced their own numbering system and I've attached a description of their system as well.

ROM stands for Repair Operations Manual or what I always used to call the Workshop Manual. Perhaps surprisingly, new copies of this are still available in both book format or as a CD. You can google it or Rimmers and maybe the other suppliers sell them. They're on Ebay quite often.

Because I'm so anal, I've printed out and laminated this chart and have it on my wall for reference

Cheers

Julian


Bolt/Screw description
Examples: HB 0910, HU 0860.

First part = Two letters, describing Bolt / Screw
HB = Hexagon Bolt HU = Fully threaded screw

First part of number = thickness
(Hint: Number = AF Spanner size in 1/16ths)

Number	UNF/UNC	AF
06	3/16	3/8
07	1/4	7/16
08	5/16	1/2
09	3/8	9/16
10	7/16	5/8
11	1/2	11/16
12	9/16	3/4
13	5/8	13/16

Second part of number = length - Add 50 for UNC
(Hint: Number = number of 1/8ths)

04	1/2
05	5/8
06	3/4
07	7/8
08	1”
09	1 1/8
10	1 1/4

So:
HB 0910 = UNF Bolt 3/8x1¼”
HU 0860 = UNC Screw 5/16x1¼ ”



Nut description

Examples: HN 2008, YN 2958

First part = Two letters, describing Nut.
HN Hex nut JN Jam, Half or Lock nut YN Nylock P TN Nylock thin LN Slotted Nut

First part of number = Two digits to describe type of Nut (Although prefix letters duplicate this)

0	Hexagon Nut
21	Jam Nut
22	Slotted Nut
29	Nylock Nut
32	Thin Nylock

Second part of number = Thread - Add 50 for UNC
(Hint: Number = AF Spanner size in 1/16ths)

Number	UNF	AF	Number	UNC
07	1/4	7/16	57	1/4
08	5/16	½	58	5/16
09	3/8	9/16	59	3/8
10	7/16	5/8	60	7/16
11	1/2	11/16	61	1/2

So: HN 2008 = Hex nut 5/16 UNF; YN 2958 = Nylock nut 5/16 UNC



Washer description

First part = Two letters, describing Washer.
WL Lock washer WM Washer Medium Plain WP Washer WQ Lock washer square sect

First part of number = Two digits 00, 01, 02, 08 to describe Washer ????
Second part of number = To fit bolt or screw size: (Although Triumph book doesn’t seem consistent on this)
(Hint: Number = AF Bolt size in 1/16ths)

Number	UNF/UNC	AF
07	1/4	7/16
08	5/16	½
09	3/8	9/16
10	7/16	5/8
11	1/2	11/16

And now the later BL numbering system:

BH Bolt HEX
SH Screw Hex

These were followed by 6 digits


1st is thread indicator: 5 = UNC 6 = UNF 1 = Metric 2 = Coarse Metric

2nd and 3rd indicate diameter counting in sixteenths: Eg 07 = 7/16 08 = 1/2

4th and 5th give length in 1/8ths: Eg 10 = 1 1/4

6th indicates the finish: 1 = Bright Zinc plate



So, BH607321 should be: a hex bolt; UNF; 7/16; 32/8ths = 4"; Bright Zinc plate

[milothedog]

Whats the Rom, a CD?, who will sell one to me please?

Repair Operations Manual or in plain English the Workshop manual Peter. If you haven't got one I can give you an electronic copy (pdf)

Ian.

[jleyton]

Repair Operations Manual or in plain English the Workshop manual Peter. If you haven't got one I can give you an electronic copy (pdf)

Ian.

Hey Ian, isn't that what I said two hours ago ? : "ROM stands for Repair Operations Manual or what I always used to call the Workshop Manual"

Cheers

Julian

[milothedog]

Hey Ian, isn't that what I said two hours ago ? : "ROM stands for Repair Operations Manual or what I always used to call the Workshop Manual"

Cheers

Julian

That maybe so but I have not long had my eye's open and the brain has only just gone in to gear

[jleyton]

the brain has only just gone in to gear

Sounds like me for most of the time

Morning Ian, btw.

Cheers

Julian

[Motorcycle mad]

Hi Nambo
As a motorcycle restorer you may be interested in this web site, http://www.custom-fasteners.co.uk/ they supply a lot of imperial/UNF/UNC, metric, bolts, nuts and washers, in various lengths, and finishes including chrome and stainless steel. They also supply a range of studs in various sizes and finishes, plus other custom parts. I have used them over many years and always had good service.

Ken

[jakesmig]

Julians chart eplains what the redundant code breakers got up to after the war

[Nambo]

Ah, of course, Repair Operations Manual, I do have one, though these days its looking a bit sad as I used to keep Lovebirds that decided the cover made good nesting material.
However, I cannot see part numbers in mine, only numbers I see refer to the particular operation.
Iam used to British bike exploded diagrams with arrows and numbers pointing to each part.

Where are these Triumph part numbers please?

Thanks for the tip Ken, I have always used Dave Middleton for all my SS fasteners, I think he has the best finish and quality, for instance, most folk say not to use SS for the cylinder head as ss bolts stretch, well Daves don't, even on my Commando.

Peter

[jleyton]

Hi Peter,

I hope my chart was of some use to you ?

Anyway, it sounds like you're after the original parts book that, like the ROM, is still widely available. Check out Rimmers or Ebay.

Cheers

Julian

Here you go: http://www.rimmerbros.co.uk/Item--i-519579
not cheap, but invaluable.

[StagnJag]

I'm surprised no one has mentioned the Stanpart Hardware catalogue. This has the vast majority of nuts bolts, set screws washers etc. It does pre-date the Stag though and doesn't cover 100% but you can usually work out what you need. You

I have also got my own website which is progressing slowly: http://www.parts.stagwiki.com/index.php it is designed to be used in conjunction with the Stag parts book. I have described all the bolt specifications I could find. Hopefully you should find that useful.

Rgds

Dave

[milothedog]

I'm surprised no one has mentioned the Stanpart Hardware catalogue. This has the vast majority of nuts bolts, set screws washers etc. It does pre-date the Stag though and doesn't cover 100% but you can usually work out what you need. You

I have also got my own website which is progressing slowly: http://www.parts.stagwiki.com/index.php it is designed to be used in conjunction with the Stag parts book. I have described all the bolt specifications I could find. Hopefully you should find that useful.

Rgds

Dave

Dave, you haven't let me have an e-mail address for the Dropbox link

Ian

[Matt]

Thats interesting - Lotus had a similar method of identifying their standard fasteners; being Lotus is wasn't quite the same as the Triumph/BL version