FORESPAR 906018 251 Series 1 1/2 Thru Hull CF 251 NPSM thread

These lightweight, corrosion-free Thru-Hulls are crafted in Forespar's California factory from high-strength Marelon and are suitable for above and below waterline use. They can be combined with an elbow connector if a 90 deg. intake is needed. Recommended maximum torque setting of 20 ft/lbs.

Features:

  • Marelon® is a proprietary formulation of polymar composite compounds using composite reinforced polymer and additives to produce a superior marine-grade product
    • Designed for use above and below the waterline
    • Complete freedom from corrosion
    • High strength
    • UV Stabilized
    • Will not freeze or become brittle with age or temperature extremes
    • U.L. and A.B.Y.C. approved
    • Marelon fittings can be installed using the same techniques and materials as bronze fittings

Minimum Physical Properties Required for Approval are:

  • Tensile Strength 10,900 psi/75 mPa
  • Flexural Modulus 500,000 psi/3480 mPa

Note: A seacock (sold separately) is required for use less than 6" above the waterline.

Value by test to ASTM D638 (American Society of Testing & Materials)

Value by test to ASTM D790 (American Society of Testing & Materials)