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Danny Ray Thomas
***
pniederber@aol.com
***
 
 
'TOOL STANDARDS'



  Board #16
 
1/2
  INCH WRENCHES

  This board displays 17 wrenches
  with 19 different identifications and sizes.
         And their all marked 
1/2".

 

  This means that even though the opening
  measures out at, lets say, 75/100s of an inch (3/4")
  The end of the wrench is stamped with the
  designation of 
1/2".



  Just click on the individual
  tool for additional information,
  and it will come right to the top.

Display #

Brand

Tool #

Size

Opening

1.  Plomb 1216 1/2 50/100

This Plomb represents the modern combination wrench. This same basic design is still used today.
For a complete History of Plomb tools, click on
http://pweb.jps.net/~gemlake/plombtoo.htm

2. Austin 4-C 1/2  92/100

We assume this is a Whitworth measurement, as the tool probably was for the English-built Austin car.

3. Nderes 79-c 1/2 OC 1/2 SAE 80/100

Fits 1/2 Hex Head Cap Screw

4. W&B 33 1/2 92/100

This is a Whitman & Barnes, and based on the opening size, it appears to be Whitworth.
For the History of W&B, see American Wrench Maker, Page 264, on our
 
Books Page.

5 Billings & Spencer 2026 1/2 OC - 1/2 USS 79/100 - 88/100

Light service wrench fits hex head cap screw sizes 1/2 and 5/8 and S.A.E. standard screw nut
sizes 1/2 and 9/16. Milled openings 3/4 (.750) and 7/8 (.875) 91/4" long

6. Williams 733 1/2 USS 88/100

Fits head or nut on a 1/2-13 USS bolt. For more information on Williams,
refer to page 270, American
Wrench Maker, on our  Books Page.

7. Billings & Spencer 2025 1/2 CAP 77/100

Light service wrench fits hex head cap screw sizes 1/2 and 9/16.
Milled openings 3/4 (.750) and 13/16 (.8125) 91/4" long

8. Spearpoint   1/2 AF 50/100

1/2 AF means American Fine, a British term,
for more info click on
http://www.team.net/sol/tech/SpannerSize.html

9. Winchester 1537 1/2 STD 101/100

Standard nut size 7/16 & 1/2. Milled opening 28/32 (.8750) & 32/32 (1.00) 103/8" long.

10. Billings & Spencer 1566X 1/2 NUT 88/100

Fits head or nut on 1/2-13 USS Bolt

11. Snail 6 1/2W - 1/2 BS 94/100 - 82/100

For explanation on this wrench, refer to Web Page http://www.team.net/sol/tech/SpannerSize.html
also refer to Web Page
http://www.team.net/sol/tech/whitworth-hist.html.

12. Shelly   1/2 BSF 92/100

For explanation on this wrench, refer to Web Page http://www.team.net/sol/tech/SpannerSize.html
 also refer to Web Page
http://www.team.net/sol/tech/whitworth-hist.html.

13. Da Sco 6-31 1/2 CS 77/100

Fits head on 1/2 Cap Screw.

14. M.B. Skinner Co.   1/2 bolt 80/100

No idea what bolt they refer to.

15. Automatic Sprinkler 38-070 1/2 F-HS  -  1/2-17/32-H 72/100 - 84/100

We assume this is a special tool for their specific application.

16. Williams 307 1/2 USS-Bolt 94/100

Fits the head and nut on their version of 1/2- USS Bolt.
Note the difference in size from #5 and #6 probably from wear, etc.

17. Wright P 3 J 1/2 OP 50/100

No idea what OP means. For more information on Wright,
refer to page 276 - American Wrench
Maker, listed on our
Books Page.

Thanks to Don "Bus" Haury - at  donhaury@southwind.net  and others for their response.
With their help we have been able to clean up the meaning on most of these wrenches.
We could still use help on #14, #15 and #17.

For an interesting article on standardizing wrench measurements, drop Don or us a line.


If you have any comments, knowledge, or feedback, please drop us a line!