Stainless Steel Locknut (Priced Per Pkg of 5) - 18-3721-9

The Stainless Steel Locknut (Priced Per Pkg of 5) - 18-3721-9 is a marine plumbing component for installation or replacement work.

Product information

• Sierra Stainless Steel Locknut- 18-3721-9
• Material: Stainless Steel w/ nylon insert
• Thread Size: 7/16" or 11.1mm - 20
• For: MCM inner transom studs and prop nut for Mercury 39, 60 (1968 & newer, 8 spline)
• 21170
• 11-21298
• 11-22178
• 11-24648
• 11-29241
• 11-33962
• 11-34933
• 11-82671015
• 11-134391
• 11-46355
• 11-859116
• 11-8M0204653
• 11-95702

Before ordering

Please compare the listed specifications and part number with your existing component. If you need help confirming compatibility, contact Jet Ski Parts Warehouse with your make, model, year and engine details.