Heavy Locking Nut

ELIMINATE PROPELLER SPINOFF Our 7/8” hex aluminum heavy locking nut is designed in a variety of sizes to suit all the major engines on the market, please see our table below to make sure you choose the right size. The design of these is to replace your propeller washer and in combination with your standard propeller nut or one of our spinner nuts the nuts will work together to prevent propeller spin off, We also do a slightly lighter version if you need a little less nose weight please see our other products. Weight approx 15g Engine Crankshaft Thread Size Reference Chart This document provides a comprehensive reference list for standard model airplane engine crankshaft thread sizes based on the manufacturer and model configurations. Brand / Manufacturer Engine Model / Type Displacement Range Crankshaft Thread Size ASP All Models .21 - .46 1/4 - 28 ASP All Models .60 5/16 - 24 ASP All Models 1.08 3/8 - 24 ASP Four Stroke .65 - .91 5/16 - 24 Enya Four Stroke .46 - .53 1/4 - 28 Enya Four Stroke .60 - 1.20 7 x 1 mm Enya SS 2 Stroke .25 - .50 1/4 - 28 Enya SS 2 Stroke .15 - .25 6 x 1 mm Enya Non SS 2 Stroke .35 - .60 7 x 1 mm Evolution Two Stoke .36 - .61 1/4 - 28 Evolution Two Stroke 1.20 5/16 - 24 Fox All Models .19 - .50 1/4 - 28 Fox All Models .60 - 1.20 5/16 - 24 GMS All Models .40 - .47 5/16 - 24 HP All Models .21 - .61 1/4 - 28 Irvine All Models .20 - .46 1/4 - 28 Irvine All Models .61 - .72 5/16 - 24 K&B All Models .20 - .65 1/4 - 28 Magnum All Models .21 - .45 1/4 - 28 Magnum All Models .61 - .91 5/16 - 24 Magnum All Models 1.08 - 1.80 3/8 - 24 MDS All Models .18 10 - 32 MDS All Models .25 6 x 1 mm MDS All Models .28 - .58 1/4 - 28 MDS All Models .61 8 x 1.25 mm MDS All Models .68 5/16 - 24 Moki All Models .51 6 x 1 mm Moki All Models .61 7 x 1 mm Moki All Models 1.80 10 x 1 mm MVVS All Models All Sizes 6 x 1 mm OS Four Cycle .20 - .48 1/4 - 28 OS Four Cycle .60 - 2.00 5/16 - 24 OS All Two Stroke .20 - .50 1/4 - 28 OS All Two Stroke .61 - 1.20 5/16 - 24 OS All Two Stroke 1.08 - BGX 3500 3/8 - 24 Rossi All Models .40 - .90 8 x 1.25 mm Saito FA .30 1/4 - 28 Saito FA .40 - .45 6 x 1 mm Saito FA .50 - .90T 7 x 1 mm Saito FA 1.20 8 x 1.25 mm Saito 3 Cylinder .90 - 1.20 7 x 1 mm Saito 3 Cylinder 1.70 - 3.25 8 x 1.25 mm Super Tigre All Models .19 - .60 1/4 - 28 Super Tigre All Models .61 - .90 5/16 - 24 Thunder Tiger All Models .25 - .46 1/4 - 28 Thunder Tiger All Models .61 - 1.30 5/16 - 24 Tower Hobbies Two Stroke .46 1/4 - 28 Tower Hobbies Two stroke .61 - .75 5/16 - 24 Webra All .21 - .60 1/4 - 28 Webra All .80 - .90 8 x 1.25 mm YS 2 Stroke .45 - .61 8 x 1.25 mm YS 4 Stroke .91 - 1.40 8 x 1.00 mm