Comparison : Item # 54154P, Heavy Pressure - with Nylok - No Locking Element - Metric
Item # 54155P, Heavy Pressure - with Nylok - No Locking Element - Metric
Item # 54156P, Heavy Pressure - with Nylok - No Locking Element - Metric
Item # 54157P, Heavy Pressure - with Nylok - No Locking Element - Metric
Item # 54354, Heavy Pressure - with Nylok - No Locking Element - Metric