Width Across Flats: 4mm/0.16"; Width Across Corners: 4.3mm/0.17"
1.Hex head, female threaded inside, metal material, anti-loose hex nut.
2.Used with a machine or cap screw for mechanically joining materials together.
3.Used widely for matching screws or bolts.
Package Content: 50(+/-2%)Pcs x Nylon Lock Nuts
Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm.