They fit 1" square tube and are made of Nylon.  Square tube Bimini Tops are mostly put on pontoon boats.  

316 Stainless Steel Gas deck fill port with key.  This deck fill is stamped with the word “Gas”.  The cap lanyard is included.

Stainless Steel Through Hull Outlets with Hose connection

Chrome-Plated Zinc Die-Cast Heavy Duty 7/8" jaw slide.  It has one stainless machine screw for attachment to the frame.

Stainless Steel Ball and Socket Deck Hinge .  It is for mounting on a flat surface. It has a lanyard to prevent the ball from coming out. 

Black replacement rubber gasket for the 87509 rod holder

Rugged construction for durability. Mount from inside transom. Bulk items come in reusable bucket.
Twist-Turn Plugs: Fully adjustable, will not leak or jar loose.

Stainless Steel With Neoprene Seal. Fits Drain Tube 1"

I will combine shipping for multiple items.

Chrome Plated Brass Pontoon Deck Lid Cam Latch.  These are sold as single units.  They are used for fastening hatches, doors, cabinets and other items for a tight seal.