Sheaffer Blind Cap Removal Wrenches (D-11 Tools)

TOOLS FOR REMOVING BLIND CAPS FROM SHAFTS ON SHEAFFER VACUUM FILLING PENS.  

There are 4 different methods Sheaffer used to terminate the threaded plunger shafts into its blind caps: one simply employed the screwing of the shaft into the blind cap requiring little more than some sort of soft pliers to hold the shaft while the blind cap is being turned. The three other methods utilized unique screws with the shafts going through the centers, described as follows:

1.  A screw with a relatively fatter slot releasable using wrench D-11.
2.  A screw with a thinner slot releasable using wrench D 11-B.  You COULD also use wrench D 11-B on the fatter slotted screw in a), above, but you would booger-up the slot in the very soft aluminum, much the same way that too small of a regular screw driver would damage a slot thicker than that for which the screw driver was intended.  If there is play when the tool is inserted into the slot, better go to tool D 11 before applying torque.
3. A screw with just a notch on either side of the shaft on the circumference of the screw, not a continuous slot, releasable using wrench D 11-C.

66% of the 137 pens and parts pens in my inventory that I’ve checked use the first, more simple, direct screwing of the shaft into the blind cap using no screw while 14% utilize method a) above, 6% utilize method b), and 14% utilize method c).