Model: NOV 87074-8-B Star Lock Washer
Material: Brass alloy
Size: 1/2 inch nominal
Structure: Multi-tooth star serrated lock washer
Application: Bolted flange connections of NOV Varco TDS-9SA / TDS-11SA top drive
Feature: Anti-loosening, vibration damping, anti-galvanic corrosion
Operating environment: Onshore & offshore drilling rig
Installation: Used on precision valve blocks and electrical mounting flanges
