Triumph/British Leyland parts catalogue

[jpyke]

I have the ROM (essential reading) and I've recently got a copy of the Stag Parts Catalogue - which is really useful (the exploded diagrams are brilliant for working out how an assembly goes back together when it was taken apart with some haste and I've forgotten quite how it goes!)...

So my question is this, is there a master reference (whether this is specifically Triumph or maybe British Leyland) that lists the part numbers and tells you what they are?

For example, I'd like to be able to look up part number 'HU858' and see that it is a '5/16 x 1" UNC machine screw'.

It would be useful because I'm planning to replace a number of the rather rusty or otherwise tired fittings that I've removed with stainless items and rather than buying the 'job lot sets' you can get on ebay (and ending up with lots I don't need) it would be good to plan it all out and order in one go. Yes I can go through all the bits I've taken off and measure them, but (a) it would be quicker to refer to a parts catalogue and (b) there's no saying that what came off was the correct part!

I think Peter at LDparts has something of this ilk, so I could ask him...

James

[jpyke]

I should probably add that I realise that stainless bolts aren't as strong as high tensile steel ones, so I would only plan to do a swap where appropriate...

[jleyton]

Hi James,

I don't know whether you've seen it but at the back of the parts book there is a numerical listing that, very briefly, describes each part number.

However, if you are specifically after part numbers for nuts and bolts etc then Triumph had a logical way of numbering all of these parts (subsequently, BL did it a different way and a few Stag parts were numbered the later BL way)

Below is a chart to identify a nut or bolt etc from its part number.

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)

20	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 here is the latr BL system, but I've only got it for bolts:

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

[Nambo]

Some nice fella here pointed me to this: http://www.parts.stagwiki.com/index.php just insert part number from the book into the search box.

As for Stainless Steel nuts and bolts, yes they are generally weaker unless you buy them from here:- http://www.stainlessmiddleton.co.uk/

Ive used this guy since he first started up in the late 70s, not only are his bolts well finished and polished, they are very strong, strong enough to Hold the cylinder head and barrel on a 1972 Combat engined Norton Commando!

Iam using them a lot on my Stag rebuild, even the bits you dont see like a stove enameled heater box held together with about 80 of his shiny self tappers.

2081441460041880440IQSfYj_fs.jpg

[StagnJag]

Some nice fella here pointed me to this: http://www.parts.stagwiki.com/index.php just insert part number from the book into the search box.

That be me!

It is fairly complete, but there are a few gaps in it in places! If it doesn't work for you give me a shout!

Rgds

Dave

[jpyke]

Thanks Julian 'nambo' and dave, really useful information and exactly what I was looking for. Another winning example of the forum at its best!

James