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News

ISO 16028 flat face hydraulic quick coupler relief tools
Sep 13, 2026
ISO 16028 Flat Face Hydraulic Couplers: Complete Identification & Size Guide

Tractor Relief Tool™

TractorReliefTool.com

California, USA

TractorReliefTool.com is a Division of PT Squared Trading Co LLC, Manufacturer of these Tools.

A USA Family Owned Small Business

Tractor Relief Tool™ Online Store

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Hydraulic Coupler Guides, Tips & News

Example photos to send us

Send 2 photos of the male coupler end: 1) a side view, and 2) a measurement across the male end diameter — calipers are best, a tape measure works too. We’ll reply with your size.

Example photo 1: side view of a male hydraulic coupler end with the stamped markings visible
Photo 1Side view of the male coupler end Get the whole male end in the shot, close and in focus. If there’s a number stamped on it, turn it so the stamp shows.
Example photo 2: digital calipers measuring across the male coupler end diameter, reading 24.46 mm
Photo 2 · BestCalipers across the male end Clamp the jaws across the male end diameter (not the female end). Make sure the reading is clear — mm is most accurate.

— or —

Example photo 2 alternative: tape measure held straight across the end of the male coupler
Photo 2 · No calipers?Tape measure across the male end Hold the tape flat and straight across the end of the male coupler, with the hook lined up on one edge, so we can read the marks.
Email my 2 photos to Relief@ReliefTool.com

Please don’t guess — we’ll tell you the right size.

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