1) Pivot 2) Towing hook 
The pivot centering a post mill on top of the main post.
The pin or bolt on which a ships rudder pivots. The pintle rests in the gudgeon.
The pin or bolt on which a ships rudder pivots. The pintle rests in the gudgeon.
A pintle is a pin or bolt, usually inserted into a gudgeon, which is used as part of a pivot or hinge. Pintle/gudgeon sets have many applications, for example: in sailing to hold the rudder onto the boat; in transportation a pincer-type device clamps through a lunette ring on the tongue of a trailer; in controllable solid rocket motors a plug move...
bolt or pin on which something turns, as a hinge
Yoke bolted to the back of the rudder with a vertical pin that fit into a corresponding gudgeon. This formed a hinge on which the rudder pivoted.
• (n.) A pivot about which the chassis swings, in some kinds of gun carriages. • (n.) The pivot pin of a hinge. • (n.) A hook or pin on which a rudder hangs and turns. • (n.) An upright pivot pin • (n.) A little pin. • (n.) A kingbolt of a wagon.
The pin which fits into a gudgeon allowing stern mounted rudder to hinge.
Part of a rudder hinge that fits into a gudgeon.
a pin on the leading edge of a rudder that slots into the gudgeon
Pin'tle noun [ A diminutive of Pin .] 1. A little pin. 2. (Mech.) An upright pivot pin ; as: (a) The pivot pin of a hinge. (b) A hook or pin on which a rudder hangs and turns. (c) A pivot about which the chassis swings, in some kinds of gun carria...
Overdrift millstonesThe pivot centering a post mill on top of the main post.
[n] - a pin or bolt forming the pivot of a hinge
noun a pin or bolt forming the pivot of a hinge