McKissick 431 Super Champion Snatch Block - 1-1/8 in - 20 Ton - 12 in - Roller Bearing

Product Description

The McKissick Series 431 Super Champion Snatch Block is a heavy-duty single-sheave block engineered for high-capacity rigging, pulling, and load-redirection operations in demanding industrial environments. Rated to a 20-ton working load capacity and designed to accommodate wire rope up to 1-1/8 inch in diameter, the Series 431 delivers the structural integrity and sustained performance required in oilfield, construction, marine, and offshore applications. The 12-inch sheave outside diameter provides a generous rope bend radius, helping to reduce wire rope fatigue and extend rope service life under repeated heavy-load cycles.

Equipped with a roller bearing assembly, the Series 431 minimizes friction between the wire rope and sheave during operation, reducing wear on both the rope and the block and extending overall service life compared to bushing bearing designs. The snatch block configuration features a side-opening cheek plate, allowing the block to be attached to or removed from a wire rope at any point along its length without threading the line — an important operational advantage in field rigging setups where efficiency and accessibility are priorities.

McKissick's Super Champion designation identifies a reinforced, high-capacity tier of construction within their block product line, intended for sustained use under demanding working loads where standard blocks would be insufficient. The Series 431 is commonly deployed with heavy winches, cranes, and pulling systems to redirect wire rope leads or to develop mechanical advantage in large tackle assemblies. All shackles, hooks, and attachment hardware used in conjunction with this block should be rated to match or exceed the 20-ton working load limit to maintain a safe and compliant rigging assembly.

Material:

Steel construction (housing and cheek plates) Roller bearing

Compatible With:

1-1/8 in wire rope

Uses:

Wire rope load redirection Heavy winch and crane rigging systems Oilfield and construction pulling operations Marine and offshore rigging High-capacity mechanical advantage tackle systems

Key Features:

20 Ton working load capacity 12 in sheave outside diameter Accepts up to 1-1/8 in maximum cable diameter Roller bearing for reduced friction and extended service life Side-opening snatch block design for mid-line attachment McKissick Series 431 Super Champion