Provincial
Well-known member
Secret fasteners that held "Fat Man" together?
I included the 3rd pic to ameliorate the thread hijack.I just completed a long-distance trade with a Canadian GJ member who shall remain as nameless as he wants to be, and, knowing my affection for weird stuff and wartime stuff, threw in this double-whammy DBE wrench for good measure. It was quite a cool surprise.
As you can see, that end with the Joe Theismann/Alex Smith/Dak Prescott-looking offset is actually double orthogonal, bent 180*, in parallel with the edge of the shank, with the service opening (3/8" hex) facing backwards. So it must have been used to get at something sunken behind a thin obstruction, like a sheath or guard, either by reaching it over from above or underneath. It has a small through hole. Typically with these kinds of twisters, like something in an aircraft engine compartment that is hard to reach.
The other end is angled from the shank, not offset, at 45*, and it is bent in line with the flat of the shank. It also has a 3/8" hex service opening, and a through hole, with a much shallower 3/8" hex opening on the back side.
The wrench is marked with the opening sizes ("3/8"), what appears to be a part number ("5CB848") and what appears to be a logo. An "F" inside a triangle, like so: /F\.
On the flip side it's marked "USAC" (almost certainly United States Air Corp) and what may be either "AFTS" or "HFTS". Until research proves otherwise, I am going with HFTS and Helicopter Flight Training School.![]()


You're new, so we'll go easy on you, first offense and all, but #1 GJ commandment is, "THOU SHALL NOT **** THYSELF!"...wonder if these qualify for a "you ****".
Even if it's just asking or wondering...Unfortunately, there's not anything you can do, really, except don't use it. It's not leather, and there's nothing you can do to make it more supple, less crackly, etc. I have a bunch of them, for DOEs, tappets and ignition, and the best thing you can do is not handle it. If you;re really going to use the wrenches, put them in something else and only whip out that nice original pouch and your best Scottish brogue when you want to do a Show N' Tell with guests....suggestions how to preserve the 90+ year old "leatherette" roll from further deterioration.
That's a different "angle" and I never thought about IT that way. I need to find another way to earn brownie points.You're new, so we'll go easy on you, first offense and all, but #1 GJ commandment is, "THOU CANNOT **** THYSELF!"Even if it's just asking or wondering...
Hi Jock. That's a Thorsen made wrench. I think Thorsen only used this numbering system for a short period of time. starting right before the war.



Ahhh, actually still no.^ OK, HAHA.
So do I get at least half a "you ****", or an "attaboy" now?![]()
"Thou shalt not **** thyself"


Please see my previous post. I should have quoted before responding. Seems I can’t insert a quote retroactively; at least, I don’t know how since the great migration to WYSIWYG editing.Found a strange long thin DBE today.
Identifying the precise geometry of the lobed drive broaches is probably the way to identfy the manufacturer. Is it LocRite, FlankDrive, etc?the broached ends seem to have that different pattern…than the regular pattern I usually see in wrenches.
I am swallowing my pride on this set of round shank deep double offsets that I just picked up at the flea market this morning and cannot identify!
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The italicized CHROME MOLYBDENUM MADE IN U.S.A. marking that was nagging at the outer contours of my memory banks for the past few hours is now just mocking me.
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Talk with Todd. I traded a few off to him and I know he was doing research on them. Truth comes to mind but it has been over a year since we talked on them.
WRT the recessed size marking, I have a Barcalo, a English-made Bedford, and a likely Chrome X.
Barcalo? The early stuff was Cr-Mo. Their DOEs have similar fractional size stamps. These seem later, from when they should be raised-panel, but what if those machines were busy but they needed MORE.
I know that’s a WAG, and I feel a bit like an a-hole just popping off like that...
I vote no on Barcalo.
Apparently Todd's TRUTH was untrue, BlueBomer was on the right track, LesserSon is not an a-hole, and Don and I both voted against the winning candidate!Yeah it's not screaming Barcalo to me either. (Did they even make round shanks?)
I think AA just published an article on this subject. Can't remember who they proved it manufacture these.Hey Gang,
I have an interesting update on these!
Apparently Todd's TRUTH was untrue, BlueBomer was on the right track, LesserSon is not an a-hole, and Don and I both voted against the winning candidate!![]()
Okay. Live and learn. I’ll start looking for some.Yup. (You didn't read my last line!)
I was just on the AA main/home/welcome page for the first time in a long time when I noticed this update from them back in May!
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Mystery Solved .. 14 Years Later!
May 2, 2021. Back in 2007 we found several "Chrome Molybdenum" offset box wrenches with distinctive forged-in "size panels" on the shank, but couldn't identify the manufacturer. With the hope that additional clues would appear (or that someone would recognize the maker), we placed the wrenches in our "Mystery Tools" section.
Then recently while doing a routine review of the 1938 None Better catalog, we noticed that the illustration for offset box wrenches seemed to have some faint markings. Getting out the magnifying glass, we found what appeared to be ... "Chrome Molybdenum" and two size panels! This piqued our curiosity, and remembering that None Better sometimes used Barcalo as a contract manufacturer, we next got out the 1934 Barcalo catalog. The last page of the catalog has an illustration of chrome molybdenum box wrenches, and close inspection found the same distinctive markings! With Barcalo confirmed as the maker of the mystery wrenches, we have moved them to their proper home in the Barcalo article.
To save our readers the trouble of straining their eyes (or finding a magnifying glass), we made a high-resolution scan of the illustration and extracted a close-up view of the markings. We're glad to have finally solved the mystery, and this exercise also confirms the importance of good catalog illustrations in rediscovering the history of the tool industry.
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I've been awfully hard on AA, and rightfully so, but credit where credit is due - I think they cracked this one.
In this hobby it's always a risk to speak in absolutes, but as far as I know, that's a yes, almost like a branding mechanism.Was the "Nickel Molybdenum" moniker used exclusively by Bridgeport Hardware?
None of us are, never were, nor never will be a "hoarder". Hush your mouth.Just trying to do some sorting out, and what not, trying to be reclassified from a hoarder, to a compulsive accumulator. .....
Beautiful collection, oob! Harken back to post #1 to see you've echoed exactly how this thread started more than 6 years ago!


