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Harken 3215 57mm Single Black Magic High-Load Airblock Swivel Block

Sale price$224.95 Regular price$255.00

HARKEN 3215 

Single Black Magic® AirBlock® - 57mm  NEW!

The entire line of Black Magic® AirBlocks® has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same.

Used on offshore boats, these strong, lightweight blocks feature high-load Torlon® roller bearings for a high strength-to-weight ratio and reduced wear. Rollers are housed in a center cage and stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum side plates protect sideload ball bearings. Dissimilar metals are isolated to minimize corrosion. Like all Black Magic® AirBlocks®, the three-way head swivels/locks in front/side positions. Blocks are easily disassembled with a single hex wrench.

Standard blocks have 17-4 PH stainless head posts. Low-load blocks use Torlon® rollers and 316 stainless steel shackles. 

Use for:
  • Sheets
  • Halyards
  • Running backstays
  • Control lines

Specifications:
  • Sheave Diameter - 57mm (2-1/4")
  • Max Line Diameter - 7/16" (12mm)


Mfg No. Description Length Shackle Pin
Diameter
Max Working
Load
Breaking
Load
Weight
3215 Single / swivel 4-11/16"
(119mm)
1/4"
(6mm)
2500 Lbs
(1134kg)
5000 Lbs
(2268kg)
5.36 oz.
(152g)
Harken 3215 57mm Single Black Magic High-Load Airblock Swivel Sailboat Block - Pacific Sailboat Supply
Harken 3215 57mm Single Black Magic High-Load Airblock Swivel Block Sale price$224.95 Regular price$255.00