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Spars, Rigging, and Hardware for Sailboats

Rig-Rite, Inc.
Phone: (001) 401-739-1140 -- FAX: (001) 401-739-1149         Ordering/Questions

NB-70 Isomat Boom

Isomat NB-70 Boom Section
Measurements (OD): 10 1/4" x 4 1/4"   (260mm x 109mm)
Wall Thickness: .138"   (3.5mm)
Weight/ft.:  5.16 lbs.   Weight/M: 7.7 kg
Moments of inertia: Ixx = 65.09", Iyy = 12.88"
Moments of inertia: Ixx = 2709cm4, Iyy = 536cm4
Circumference: 27 5/8"   (708mm)
Sail slides: 1/2" round slugs (A018, A118) or 1/2" boltrope
Lower Track: 31mm x 4.5mm   (1 7/32" x 5/32")
Alloy: 6061-T6
Standard Lengths: No Longer Available

Common Boom usage: 


Isomat NB-70 Boom Section
The Isomat NB-70 Boom Section is a rare Isomat variant similar to other NB2 Boom Sections, but taller, and relatively thin. The NB-70 Boom Section and its' end castings are no longer available, but all other components were as used on the NB-40 Boom. See: NB-40 Boom Section.

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