Tie rod bolts not all the same

[FATMAN]

Going though a box and found these some oilers are man hole some have a ball the heads are not the same, any ideas how many types were made all the correct size,Bob

[FATMAN]

more photos
some reason re sizing does not let me add to this site

[FATMAN]

try another camera

[TRDxB2]

Going though a box and found these some oilers are man hole some have a ball the heads are not the same, any ideas how many types were made all the correct size,Bob

From the MTFCA Encyclopedia

09-06-16 “Brought drawing up to date with oilers as they are being made by changing the design from 4N Bowen. The new type was the Winkley.
09-30-16 T2944 spring oilers. These were used on the springs, replacing the hanger oilers. They were Winkley 1-G “Special Winkley Oiler.” They appear to have a spring-loaded ball as a “door.” Push the ball down to add the oil and then the ball seals the hole. They were zinc plated.
11-29-16 Changed from the above Winkley to the man-hole style, also made by Winkley, and were initially raven finished but later Zinc coated. This oiler was also used on the commutator.
12-13-16 Changed to Winkley oiler #3, Style R.
02-08-17 This same oiler now used on the spindle bolts.

No idea on the bolt head difference