Crest Diameter And Ovality Gages

Crest Diameter and Ovality Gages – MRP®

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Thirty years ago, Gagemaker introduced the MRP® crest diameter and ovality gage which forever changed the industry. Today, the MRP® series of gages is the industry standard worldwide. Whether you call it Crest Diameter, Root Diameter, or Ball PD, Pitch Diameter governs the strength of the actual thread assembly and ensures API dimensional measurement specs are met. (Check out the new carbon fiber MRP AIR.)

The Gagemaker MRP® crest diameter gages measure the internal and external pitch diameters of tapered threaded connections. Any slight variations in diameter or ovality are immediately detected with these precision gages granting you total control over your quality. These versatile gages easily adjust to measure thread diameters ranging from 1½” – 20”. The ability to inspect a range of diameters with one gage, eliminates the need for a room full of ring or plug gages.


MRP® Crest Diameter and Ovality Gages

This MRP® series of gages detect variations in crest diameter (or pitch diameter) by the use of a gage shoe that rests on the crest of the threads. Variation in diameter is detected by the indicator readout. All of these gages are API approved for use on tubing connections sized 1” – 4½”.
This MRP® series of gages detect variations in crest diameter (or pitch diameter) by the use of a gage shoe that rests on the crest of the threads. Variation in diameter is detected by the indicator readout. All of these gages are API approved for use on tubing connections sized 1” – 4½” and casing connections sized 2⅜” – 20”. To check out the new carbon fiber MRP AIR, go here.
“This MRP® series of gages detect variations in crest diameter (or pitch diameter) by the use of a gage shoe that rests on the crest of the threads. Variation in diameter is detected by the indicator readout. All of these gages are API approved for use on casing connections sized 8⅝” – 24”.
This MRP® series of gages detect variations in crest diameter (or pitch diameter) by the use of a gage shoe that rests on the crest of the threads. Variation in diameter is detected by the indicator readout. All of these gages are approved for use on tubing and premium connections sized 1½” – 24”.

MRP® Setting Standards

MRP® Rod Style Setting Standards

Gagemaker MRP Standards Box and Pin 300x135 - Crest Diameter And Ovality Gages

Rod style setting standards are designed to preset MRP® crest diameter gages for accurate inspection of API threaded

connections. Each set of standards consists of two precision ground rods that are ground to lengths in accordance with API Specifications 5B. The rod sets are securely attached together and labeled with the connection size and serial number. The rods set the location of the thread shoe and the distance between shoes for accurate inspection of threaded connections.

MRP® Frame Style Setting Standards

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Frame style setting standards are designed to preset the MRP® crest diameter gages for accurate inspection of API threaded connections. These standards consist of a rigid, non-adjustable steel block


precision machined to proper size to tolerances of ±.0003″. Round style standards, smaller than 2⅜”, are available as specials (contact us directly for more information).

Tubing Connections Rod & Frame Standards


Casing Connections Rod & Frame Standards


MRP® Step Style Setting Standards

The step style setting standards are designed to preset several models of the MRP® Crest Diameter gage series for accurate inspection of API threaded connections. These standards consist of a rigid, non-adjustable steel block precision machined to proper size to tolerances of ±.0003”.


MRP® Gage Shoes, Accessories and Replacement Parts

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