Sierra 18-3733 Prop Nut Kit, White, for SX Cobra Drives

The Sierra 18-3733 Prop Nut Kit is a complete propeller hardware set for SX Cobra drives, engineered to replace the original equipment components with parts that meet or exceed OEM standards. The kit contains everything needed for a proper prop installation in one package: a prop nut and keeper, a cotter pin, and a prop spacer, so there is no need to source individual pieces separately.

The prop nut is machined from brass with a white finish and features an M10 right-hand thread on the outside and an M6 inside thread, cut to Class 2A thread class for a reliable, secure fit. The hexagonal nut design allows for standard wrench installation, while the included cotter pin locks the assembly in place to prevent the nut from backing off during operation. The prop spacer completes the kit, ensuring correct alignment and spacing on the propeller shaft.

This kit is intended for SX Cobra applications and is built to the same fit, form, and function standards as the original hardware it replaces, making it a straightforward drop-in solution for routine propeller maintenance or hardware replacement.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3733
• Product Type: Prop Nut Kit
• Color: White
• Material: Brass
• Exterior Finish: Machined
• Outside Thread Size: M10
• Inside Thread Size: M6
• Thread Type: Right-hand
• Thread Style: Hexagonal
• Thread Class: Class 2A
• Included Components: 18-3708-1 Prop Nut and Keeper, 18-3741 Cotter Pin, 184194 Prop Spacer
• Item Dimensions: 6 x 1.25 x 7.12 inches
• Weight: 0.33 pounds
• UPC: 808282105624

Fitment

• SX Cobra

Frequently Asked Questions

What is included in the Sierra 18-3733 Prop Nut Kit? The kit contains an 18-3708-1 prop nut and keeper, an 18-3741 cotter pin, and a 184194 prop spacer, giving you all the hardware needed for one propeller installation in a single package.

What drives does the 18-3733 Prop Nut Kit fit? The Sierra 18-3733 Prop Nut Kit is designated for SX Cobra drives.

What material is the prop nut made from? The prop nut in the 18-3733 kit is machined from brass with a white finish.

What thread size does the 18-3733 prop nut use? The prop nut has an M10 outside thread and an M6 inside thread, both cut to Class 2A thread class with a right-hand thread direction.

Is the cotter pin included with this kit? Yes, the 18-3733 kit includes the 18-3741 cotter pin used to lock the prop nut assembly in place.

Does the kit include a prop spacer? Yes, a 184194 prop spacer is included in the Sierra 18-3733 Prop Nut Kit to ensure correct alignment on the propeller shaft.

What color is the prop nut kit? The Sierra 18-3733 Prop Nut Kit has a white finish on the machined brass prop nut.

How much does the 18-3733 Prop Nut Kit weigh? The Sierra 18-3733 Prop Nut Kit weighs 0.33 pounds.

What are the dimensions of the prop nut kit packaging? The Sierra 18-3733 Prop Nut Kit measures 6 x 1.25 x 7.12 inches.

Does this kit meet original equipment standards? The components in the Sierra 18-3733 Prop Nut Kit are built to meet or exceed the original equipment parts they replace.

What thread style does the 18-3733 prop nut have? The prop nut features a hexagonal, fully threaded design for standard wrench installation.