Retaining Rings come in 56 metric sizes.

Press Release Summary:

Made of carbon spring steel, Metric Retaining Rings provide tensile strength of 3,164 kg/cm² and are oil-dipped for added protection. Featuring constant circularity and groove pressure, external Series MD0471M is stocked for 3-120 mm shafts and conforms to DIN 471. Internal Series MD0472M have housing bores from 8-25 mm and meet DIN 472. Identified as Series MD6799M, E-rings are available for 1-13 mm shafts and conform to DIN 6799.

Original Press Release:

New Line of Off-The-Shelf Metric Retaining Rings Introduced by SDP

New Hyde Park, New York - A new line of off-the-shelf metric external, internal and E-type retaining rings have been introduced by Stock Drive Products to meet an increasing U.S. demand.

There are 56 of the most commonly used sizes stocked in carbon spring steel ( SAE 1065-1090), which has a tensile strength of 3164 kg/cm2. They have been oil-dipped for added protection. Complete technical specifications including shaft, groove and free diameters, groove widths and ring thicknesses, plus ring thrust strength are shown for each size.

The external rings, known as the MD0471M Series, feature constant circularity and groove pressure making them suitable for use even under heavy thrust loads and high rotational speeds. They are stocked for 3 mm through 120 mm shafts and conform to DIN 471.

The internal rings, known as the MD0472M Series, are offered for 8 mm through 25 mm housing bores and meet DIN 472.

The E-Rings, identified as the MD6799M Series, are available for 1 mm through 13 mm shafts. They conform to DIN 6799. List prices range from $4.76 to $13.75 per 100 rings.

Complete technical specifications are shown in Catalog D785, available free upon request from Stock Drive Products, 2101 Jericho Turnpike, P.O. Box 5416, New Hyde Park, NY 11042-5416. Phone: 516-328-3300 Fax: 516-326-8827 Web:

Company Name: Stock Drive Products/Sterling Instrument
Address 1: 2101 Jericho Tpke.
Address 2: P.O. Box 5416
City: New Hyde Park
State: NY
Zip: 11042-5416
Country: USA
Phone: 516-328-3300

Contact Name: Herb Arum
Title: Marketing Manager

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