Every quote sheet has two columns, and the zinc-nickel column always costs more. Here is the short answer first: pay for zinc-nickel plating when your fittings see weather, salt or washdown. Stay with standard zinc plating when they live indoors on a fixed power unit. 

A hydraulic line that has to cross a tank wall, a frame plate or a manifold panel needs a sealed pass-through. The 6C metric bulkhead fitting does that job with two 24° cone light series ends, built to DIN 2353 and ISO 8434-1. This guide covers the size range, thread list, pressure ratings and the h

2J straight JIC male 74° cone / JIC female 74° seat adapter, SAE J514 / ISO 8434-2. C45 carbon steel, zinc plated, dash 04-24. Free quote in one day.

The 50011 metric standpipe straight connects metric steel tubing (6–42 mm) to braided or spiral hydraulic hoses per DIN 2353 / ISO 8434-1. Available in light series to 315 bar and heavy series to 630 bar, machined from C45 steel with zinc-nickel plating. Part-number matched sets include standpipe, ferrule, nut, and cutting ring.The 50011 metric standpipe straight connects metric steel tubing (6–42 mm) to braided or spiral hydraulic hoses per DIN 2353 / ISO 8434-1. 

The 1JFS9 is a 90-degree elbow hydraulic adapter that connects a JIC male 74-degree cone (SAE J514, UNF thread) to an S-Series split flange (ISO 6162-2, SAE J518 Code 62, 6000 PSI). It routes hydraulic lines around obstacles without extra couplings. The body is 45# medium carbon steel with zinc plating that passes 96+ hours of salt spray testing. Thirteen sizes are available from 1/2" to 1-1/2" flange bore, including reducing configurations.