Comparison : Item # LK004401A, LK004401A - 4-40 Self-Clinching, Self-Locking Fasteners
Item # LK004401C, LK004401C - 4-40 Self-Clinching, Self-Locking Fasteners
Item # LK004401D, LK004401D - 4-40 Self-Clinching, Self-Locking Fasteners
Item # LK004402A, LK004402A - 4-40 Self-Clinching, Self-Locking Fasteners
Item # LK004402C, LK004402C - 4-40 Self-Clinching, Self-Locking Fasteners