Product specifications

US standard and metric

Call us to get your answers

+1 207 596 7705

Our charts below gives product information and specifications for Gemini Marine Products.

All cast metal products are made with 316 stainless steel.

Plastic hinges are made with acrylonitrile butadiene styrene (ABS) plastic, fiberglass reinforced, with a 316 stainless steel link.

Whatever question you have, if the answer isn’t here, please call us and we’ll do out best to help. Then you’ll be ready to shop here on this site or on our online shop.

Split and sliding side mounts*

ProductItem #Tubing size
US
Tubing size
metric
ComponentComponent
size
Sliding side
mount
GEMSL-787/8″22mmPost screw (incl
2 x nylon washers)
M6 x 1.0 thread
20mm length
Post height1¼” (32mm) off tubing
GEMSL-11″ 25mm Post screw (incl
2 x nylon washers)
M6 x 1.0 thread
20mm length
Post height1¼” (32mm) off tubing
GEMSL-1251¼”32mmPost screw (incl
2 x nylon washers)
M8 x 1.25 thread
20mm length
Post height1” (25mm) off tubing
Split side
mount
GEMSJ-787/8″22mmPost screw (incl
2 x nylon washers)
M6 x 1.0 thread
20mm length
Post height1¼” (32mm) off tubing
Clamp screw w/nutM6x1.0 thread
20mm hex head cap screw
GEMSJ-11″25mmPost screw (incl
2 x nylon washers)
M6 x 1.0 thread
20mm length
Post height1¼” (32mm) off tubing
Clamp screw w/nut M6x1.0 thread
20mm hex head cap screw
GEMSJ-1251¼”32mmPost screw (incl
2 x nylon washers)
M8 x 1.25 thread
20mm length
Post height1” (25mm) off tubing
Clamp screw w/nut M6x1.0 thread
22mm hex head cap screw

*Screws manufactured in metric

Concave fork and post mounts

All sizes: Post height is 1¼” (32mm) off tubing.

Hinge specifications

Item #OD standardOD metric*Insert diameter
standard wall thickness
Insert diameter
metric equivalent
GEMSSH-78-065SS7/8″22mm.065″ stainless steel18.75mm
GEMSSH-1-065SS1″25mm.065″ stainless steel 21.75mm
GEMABSH-78049SS7/8″ 22mm.049″ stainless steel18.6mm
GEMABSH-78058AL7/8″ 22mm.058″ aluminum19mm
GEMABSH-78065SS7/8″ 22mm.065″ stainless steel 19.3mm
GEMABSH-01065SS1″25mm .065″ stainless steel 21.8mm

*Hinge outside diameter manufactured in metric

Download this sheet

Gemini Marine Product information sheet

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