Applications for RRA-18-3721-9

Sierra Marine Lock Nuts 18-3721-9

Sierra Marine Lock Nuts 18-3721-9

RRA-18-3721-9

Not Yet Reviewed

Part Number: RRA-18-3721-9

Estimated Ship Date: Nov 9, 2026

$16.99

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Results Found: 17

Universal:
No
Outdrive Make:
GLM
Marine OEM Part Number:
21170
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20.
Universal:
No
Outdrive Make:
Mallory
Marine OEM Part Number:
9-72004-10
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20.
Universal:
No
Outdrive Make:
Mallory
Marine OEM Part Number:
9-72004
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20.
Universal:
No
Outdrive Make:
Mercruiser Stern Drive
Marine OEM Part Number:
11-21298
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercruiser Stern Drive
Marine OEM Part Number:
11-22178
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercruiser Stern Drive
Marine OEM Part Number:
11-24648
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercruiser Stern Drive
Marine OEM Part Number:
11-29241
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20.
Universal:
No
Outdrive Make:
Mercruiser Stern Drive
Marine OEM Part Number:
11-33962
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercruiser Stern Drive
Marine OEM Part Number:
11-34933
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercruiser Stern Drive
Marine OEM Part Number:
11-82671015
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercury Marine
Marine OEM Part Number:
11-134391
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercury Marine
Marine OEM Part Number:
11-22178
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercury Marine
Marine OEM Part Number:
11-34933
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercury Marine
Marine OEM Part Number:
11-46355
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercury Marine
Marine OEM Part Number:
11-82671015
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercury Marine
Marine OEM Part Number:
11-859116
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
Universal:
No
Outdrive Make:
Mercury Marine
Marine OEM Part Number:
11-95702
Application Notes:
Thread size is 7/16 in.-20, or 11.1mm -20. Fits MR, Alpha, MCM inner transom studs and prop nut for Mercury 39, and 60 (1968 and newer, 8 spline).
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