[Healeys] bolt identification

Thu Nov 22 02:58:47 MST 2018

Curtis, that is a very enlightening article. For us Europeans (exept the 
British) the UK denominations of material strength (and not to mention 
the total incomprehensible collection of all different sorts of threads 
in the UK) are an absolute nightmare. I also never knew the meaning of 
the lines on the heads of SEA/UNF/UNC bolts.

Concerning the metric bolts, before ca. 1970 the kgf/mm² (kilogram force 
per square mm) was used, equal to 9,8N/mm², in practice 10N/mm². All my 
study books used the kgf/mm²!

Kees Oudesluijs

Op 22-11-2018 om 09:32 schreef Curtis Arndt:
> John,
>
> Like most British bolts of the earlier part of last century, the 
> Vendor name was printed on the bolt, e.g. Rubery-Owen or RO, Bees, 
> Wiley, Woden and about 30+ others. So to answer your question... BEES 
> was the vendor.  The bolt you refer to with an actual Bee on the head 
> is a very early bolt, and is one that I have in my collection.  It 
> most likely is a Whitworth bolt, either BSF (fine) or BSW (coarse).
>
> The "Rubery Owen B28-35" that you refer to is a "Mild" steel bolt, 
> similar to an SAE Grade "2" US bolt.  The strength rating is "B" and 
> the measurement is 28 to 35 tons per square inch or tons tensile.  The 
> range refers to "yield" strength and "ultimate tensile" strength as 
> described in my attached article.  FYI, multiply 28 or 35 times a ton 
> and you'll get the strength in pounds, or psi... HOWEVER  we're 
> talking British here, so it's not 2,000 pounds as in a US ton but 
> 2,240 pounds as in a British Long Ton!
>
> Along with the vendor name was the strength rating expressed as a 
> letter which for _hi tensile_ bolts was D, E, F and G prior to 1950 
> and changed to R, S, T,  U,  V, W,  and X after 1950.  I have included 
> (attached) my draft on British Strength rating codes decoded which I 
> hope to officially publish on my blog site once it's up and running.
>
> Also, the bolt heads were marked to differentiate Whitworth (BSW, BSF, 
> etc...) from UNF and UNC once this new thread form system was phased 
> in during the early 1950s.  For bolts, that was a "circular" 
> depression on the head of the bolt which meant the bolt was a 
> "Unified" versus a "Whitworth" thread form bolt.
>
> I hope this helps and email me directly if you have any further questions.
>
> Cheers,
>
> Curt
>
>
>
> On Wed, Nov 21, 2018 at 9:01 PM Michael Oritt <michael.oritt at gmail.com 
> <mailto:michael.oritt at gmail.com>> wrote:
>
>     Hi John--
>
>     Check this out:
>
>     http://3.bp.blogspot.com/-2zllShyvv34/UQLGj7XqZjI/AAAAAAAAPUg/e1--MCxAPKY/s1600/Bee:1.jpg
>
>     Happy Thanksgiving to you and Cindi.
>
>     Best--Michael Oritt
>
>     On Wed, Nov 21, 2018 at 10:19 PM John Vrugtman
>     <javrugtman at htcnet.org <mailto:javrugtman at htcnet.org>> wrote:
>
>         https://en.wikipedia.org/wiki/Rubery_Owen
>
>         Bees bolts seem to be very obscure, saw a picture of one, but
>         no reference to the manufacturer
>
>         On 11/21/2018 6:58 PM, warthodson at aol.com
>         <mailto:warthodson at aol.com> wrote:
>>         I was sorting thru a box of hardware & found two bolts that I
>>         cannot identify. They both are approx. 1/4" diameter. They
>>         both have the same thread per inch. According to my thread
>>         gage they are between 24 & 26 TPI. So call it 25 TPI. I do
>>         not have a metric thread gage to check them against.
>>
>>         One is marked "Rubery Owen B28-35" on the head & measures
>>         about 5/8" long. The other is marked "BEES" & has a embossed
>>         emblem of a bee on the head & measures about 3/4" long. The
>>         lengths do not include the head, of course. No other markings
>>         on the heads.
>>         They will not accept a BSF nut, UNF or UNC nut or any metric
>>         nuts that I have.
>>
>>         Can anyone ID these for me?
>>
>>         Thanks,
>>         Gary Hodson
>>
>>
>
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