Stainless Steel Locknut - Sierra Marine Engine Parts - 18-3721-9 (118-3721-9)

When choosing the right locknuts, they should be snuggly fits in the hole they go into. If the hole is too big, the parts that lock up together can shift, and the fastener can shear. The perfect fit is essential because of a failure that could be devastating. This locknut is for MCM transom studs and propeller nut for Mercury 39, 60 (1968 & newer, with eight splines. It has a thread Size of 7/16" or 11.1mm - 20. The materials of these locknuts are from high-strength and durable stainless steel with a nylon insert. It meets or exceeds the original equipment part it replaces. Five locknuts are available in the packaging.The product replaces 47-3721, 47-3721-9, 47-37219, GLM21170, 808282164577, 11-13439-1, 11-826710-15, 18-2362-9, 18-3721, AP5164, 9-72004, 92-21170D

Key Features

• Excellent replacement locknuts for MCM studs and Mercury 39, 60 (1968 & newer, with eight splines

• The construction is from high strength and durable stainless steel

• Meets or exceed the original equipment part it replaces

Specifications

• BRAND: SEASTAR SOLUTIONS

• SKU:18-3721-9

• UPC:808282164577

• Weight:0.11 LBS

Material: Stainless Steel w/ nylon insert, Thread Size: 7/16" or 11.1mm - 20

This product replaces:

47-3721, 47-3721-9, 47-37219, GLM21170, 808282164577, 11-13439-1, 11-826710-15, 18-2362-9, 18-3721, AP5164, 9-72004, 92-21170D