
Sierra 18-3721 Stainless Steel Locknut
Features:
- Durable Stainless Steel construction
- Non-corrosive
- Hard-wearing locknut
- Thread Size: 7/16″ or 11.1mm – 20
- Replaces:
– GLM 21170
– Mallory 9-72004/ 9-72004-10
– Mercury Marine 11-34933/ 11-859116/ 11-13439-1









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