Set screws are a type of screw generally used to secure an object within another object and is generally fully threaded.  Slotted set screws are tightened with a screwdriver; square head set screws are tightened with a wrench.
Unit of Measure
Items
SLOTTED SET SCREW, CASE HARDENED, ZINC PLATED CR+3 (INCH)

#4-40 X 1/8 SLOTTED SET SCREW CUP POINT ZINC
Web Price QUOTE

SLOTTED SET SCREW, CASE HARDENED, ZINC PLATED CR+3 (INCH)

#4-40 X 1/8 SLOTTED SET SCREW CUP POINT ZINC
Web Price QUOTE

SLOTTED SET SCREW, CASE HARDENED, ZINC PLATED CR+3 (INCH)

#4-40 X 3/16 SLOTTED SET SCREW CUP POINT ZINC
Web Price QUOTE

SLOTTED SET SCREW, CASE HARDENED, ZINC PLATED CR+3 (INCH)

#4-40 X 3/16 SLOTTED SET SCREW CUP POINT ZINC
Web Price $14.86

SLOTTED SET SCREW, CASE HARDENED, ZINC PLATED CR+3 (INCH)

#6-32 X 1/8 SLOTTED SET SCREW CUP POINT ZINC
Web Price $553.22
Diameter N/A #4 N/A #4 N/A #4 N/A #4 N/A #6
Pitch N/A Coarse
Length N/A 1/8 N/A 1/8 N/A 3/16 N/A 3/16 N/A 1/8
Material N/A Carbon Steel
Finish N/A Zinc Plated
Package Quantity N/A 5000 N/A 100 N/A 5000 N/A 100 N/A 5000