7/8-9 Socket Set Screws - Cup Point

Socket Set Screw | The Nutty Company, INc.

7/8"-9 Socket Set Screws - Cup Point

7/8"-9 socket set screws with a cup point, in USS coarse (UNC) thread, made from heat treated alloy steel (ASTM F912) with a black oxide finish. We stock 1", 1-1/4", 1-1/2", 1-3/4", 2", 2-1/2", 3", 3-1/2", 4" lengths. They take a 1/2" hex key.

Specifications

Size: 7/8"-9 (USS coarse)
Lengths: 1", 1-1/4", 1-1/2", 1-3/4", 2", 2-1/2", 3", 3-1/2", 4"
Hex key: 1/2"
Tap drill: 49/64"
Point: cup
Material: alloy steel, Rockwell C45-53
Finish: black oxide

Common Uses

Pulleys and collars
Gears and knobs
Couplings

FAQ

What hex key fits a 7/8"-9 set screw?
A 1/2" hex key (Allen wrench).

What does a cup point set screw do?
The cupped end digs into the shaft as it is tightened, holding a collar, pulley, gear or knob in place. For the best hold, tighten against a flat ground on the shaft. Cup point set screws are the most common style.

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