Enrichment Code IDs Description of IDs EXTID-21649 Commercial and industrial, precision, Mil-Spec series, selflubricating, and aircraft. Sold under the Heim®, Unibal®, and Spherco® names. Available in inch and metric sizes. EXTID-21650 Precision ground, semiground, unground. High loads, long life, smooth operation. Nice® branded products are offered in caged and full complement configurations EXTID-21651 Shaft couplings serve as components to time, join, or align shafts at lower speeds and torque, especially when zero backlash is desired.Enrichment Code IDs Description of IDs EXTID-21647 Case-hardened tapered roller thrust bearings for oilfield top drives and swivels. Available in full complement, maximum capacity versions. EXTID-21648 Standard cross sections to one inch. Bore sizes to 40 inches. Stainless steel and other materials are available. Seals are available on all sizes and standard cross sections. Super duplex configurationsEnrichment Code IDs Description of IDs EXTID-21649 Commercial and industrial, precision, Mil-Spec series, selflubricating, and aircraft. Sold under the Heim®, Unibal®, and Spherco® names. Available in inch and metric sizes. EXTID-21650 Precision ground, semiground, unground. High loads, long life, smooth operation. Nice® branded products are offered in caged and full complement configurations EXTID-21651 Shaft couplings serve as components to time, join, or align shafts at lower speeds and torque, especially when zero backlash is desired.