Nylon inset lock nuts nuts are basically a hex nut with a nylon-filled collar at its back end. When a screw reaches the collar, the threads and nylon form a tight, frictional fit, restricting movement of the screw when it's subject to vibration.
Unit of Measure
Items
GRADE C NYLON INSERT LOCKNUT, NE, PHOS & OIL (INCH)

1-8 NYLON INSERT LOCK NUT NE SERIES PHOSPHATE & OIL
Web Price $398.84

GRADE C NYLON INSERT LOCKNUT, NE, PHOS & OIL (INCH)

1-8 NYLON INSERT LOCK NUT NE SERIES PHOSPHATE & OIL
Web Price $121.93

GRADE C NYLON INSERT LOCKNUT, NE, PHOS & OIL (INCH)

1 1/8-7 NYLON INSERT LOCK NUT NE SERIES PHOSPHATE & OIL
Web Price $691.19

GRADE C NYLON INSERT LOCKNUT, NE, PHOS & OIL (INCH)

1 1/8-12 NYLON INSERT LOCK NUT NE SERIES PHOSPHATE & OIL
Web Price $961.46

GRADE C NYLON INSERT LOCKNUT, NE, PHOS & OIL (INCH)

1 1/8-7 NYLON INSERT LOCK NUT NE SERIES PHOSPHATE & OIL
Web Price $94.11
Diameter N/A 1 N/A 1 N/A 1 1/8 N/A 1 1/8 N/A 1 1/8
Pitch N/A Coarse N/A Coarse N/A Coarse N/A Fine N/A Coarse
Length N/A
Material N/A Carbon Steel
Finish N/A Phosphate & Oil
Package Quantity N/A 175 N/A 25 N/A 140 N/A 140 N/A 10