Round or Flat Bolt for IBM 3,849,xxx ?

Quote:

---

Originally Posted by dbarn

Charlie, if I remember correctly the X is to show that certain revisions had been made to the design of the round bolt.

---

The X indicates the revisions were not made, only the elimination of the top cut.

Thanks Brian, that certainly makes more sense.

Brian,
When you say ' only the elimination of the top cut'
Do you mean the extra milling that would have made it a Flat Bolt?
Sorry...... But I'm a little lost here.

TIA,
Charlie-painter777

3.89 m with original AOB round bolt, x on the top.

Quote:

---

Originally Posted by dbarn

Charlie, I have 3857121 and it has a round bolt marked AOB with an X on top.

---

Same here. My 3,910,xxx also has AOB round bolt with X.