Product Description

Harken 75mm Aluminum Double footblock - lockoff
Description - The entire line of Black Magic® AirBlocks® has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same.
Carrying some of the highest loads imposed by running rigging, these strong, lightweight blocks feature Torlon® roller bearings housed in a center cage. Rollers stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings. Dissimilar metals are isolated to minimize corrosion. Blocks are easily disassembled with a single hex wrench.
Use footblocks to redirect lines on the deck. Footblocks with lockoffs temporarily secure sheets.
Either metric or imperial flathead fasteners may be used for mounting and are not exposed.
Sheave Ø (mm) - 75
Sheave Ø (in) - 2 15/16
Length (mm) - 111
Length (in) - 4 3/8
Height (mm) - 57
Height (in) - 2 1/4
Weight (g) - 574
Weight (oz) - 20.24
Maximum line Ø (mm) - 14
Maximum line Ø (in) - 9/16
Maximum working load (kg) - 1572
Maximum working load (lb) - 3465
Breaking load (kg) - 3143
Breaking load (lb) - 6930
Number of fasteners - 4
Fasteners (mm) - 8 FH mm
Fasteners (in) - 5/16 FH
A (mm) - 10
A (in) - 3/8
B (mm) - 29
B (in) - 1 1/8
C (mm) - 71
C (in) - 2 3/16
D (mm) - 21
D (in) - 13/16
E (mm) - 76
E (in) - 3
F (mm) - 110
F (in) - 4 5/16
G (mm) - 16
G (in) - 5/8