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McGard offers the most complete Marine Security Fastener Program in the industry. For over 25 years we have been the leading manufacturer of automotive wheel locks and lug nuts. This same expertise is reflected in our marine products and programs. McGard's state-of-the-art design, engineering and manufacturing enable us to produce the highest quality products for the best possible price. That combined with our contemporary packaging and factory-direct customer service makes us the obvious choice for you - and your customers. You won't find a better value anywhere. Whether it's theft protection for stern drives, outboard motors, propellers or trailer wheels, McGard has it.

Theft Protection for Mercruiser, Cobra, Yamaha or Volvo Stern Drives.

Simply replace one of the stern drive mounting nuts or Volvo bolt with a McGuard lock. Our stern drive locks are fully machined from high quality stainless steel and through-hardened. This new design features a free spinning collar that turns if attacked by gripping tools without loosening the lock. Give customers the best protection available against expensive stern drive theft.

Safety / Security: Locks-SD
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74018
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302-740180

McGard 74018 Marine Single Stern Drive Lock Set (7/16in.-20 Thread Size) - MerCruiser/OMC - Set of 1

Safety / Security: Locks-SD
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74019
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302-740190

McGard 74019 Marine Twin Stern Drive Lock Set (7/16in.-20 Thread Size) - MerCruiser/OMC - Set of 2

Safety / Security: Locks-SD
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74022
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302-740220

McGard 74022 Marine Single Stern Drive Lock Set (1/2in.-20 Thread Size) - TRS - Set of 1

Safety / Security: Locks-SD
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74023
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302-740230

McGard 74023 Marine Twin Stern Drive Lock Set (1/2in.-20 Thread Size) - TRS - Set of 2

Safety / Security: Locks-SD
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74024
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302-740240

McGard 74024 Marine Single Stern Drive Lock Set (M12x1.25 Thread Size) - Yamaha - Set of 1

Safety / Security: Locks-SD
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74025
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302-740250

McGard 74025 Marine Twin Stern Drive Lock Set (M12x1.25 Thread Size) - Yamaha - Set of 2

Safety / Security: Locks-SD
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74026
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302-740260

McGard 74026 Marine Twin Stern Drive Lock Set (5/8in.-18 Thread Size) - Speedmaster - Set of 2

Safety / Security: Locks-SD
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SDL-74020c
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302-740200

Stem Drive Locks: Single Drive: MercCruser Alpha and Bravo I-III, Blackhawk; OMC, Cobra & King Cobra, Volvo SX, DP-S

Safety / Security: Locks-SD
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SDL-74021c
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302-740210

Stem Drive Locks Twin Drive: MercCruser Alpha and Bravo, Blackhawk; OMC, Cobra

Safety / Security: Locks-SD
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SDL-74023
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302-740310

Stem Drive Locks: (Clamshell):Twin Drive: MerCruise TRS & SSM 1/2" Thread

Safety / Security: Locks-SD
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SDL-74024
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302-740320

Stem Drive Locks: (Clamshell):Single Drive: Yamaha M12x1.25 Thread

Safety / Security: Locks-SD
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SDL-74025
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302-740330

Stem Drive Locks: (Clamshell) Twin Drive: Yamaha M12x1.25 Thread

Safety / Security: Locks-SD
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SDL-74026
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302-740340

Stem Drive Locks: Twin Drive : MercCruiser III SSM; IV SSM, V SSM, VI SSM

Safety / Security: Locks-SD
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SDL-74030c
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302-740300

Stem Drive Locks: Single Drive: MerCruise TRS & SSM 1/2" Thread

Safety / Security: Locks-SD
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SDL-74031c
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302-740310

Stem Drive Locks: Twin Drive: MerCruise TRS & SSM 1/2" Thread

Safety / Security: Locks-SD
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SDL-74032c
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302-740320

Stem Drive Locks: Single Drive: Yamaha

Safety / Security: Locks-SD
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SDL-74033c
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302-740330

Stem Drive Locks: Twin Drive: Yamaha

Safety / Security: Locks-SD
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SDL-74034c
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302-740340

Stem Drive Locks (Clamshell): Twin Drive : MercCruser III SSM; IV SSM, V SSM, VI SSM