RETAINER,BEARING (P/N 21803) - Overhauled

The 21803 is a bearing retainer that separates and guides rolling elements within aircraft accessory drive bearings. This steel component maintains proper spacing between balls or rollers, reducing friction and enabling consistent lubrication flow. Installed directly inside the bearing assembly, the retainer keeps elements aligned during high-speed rotation in engine accessories, hydraulic pumps, and alternators.

Installation requires matching the retainer to its specified bearing and following torque and fit specifications in the aircraft maintenance manual.

What is the RETAINER,BEARING (P/N 21803)?

The 21803 is a bearing retainer that separates and guides rolling elements within aircraft accessory drive bearings. This steel component maintains proper spacing between balls or rollers, reducing friction and enabling consistent lubrication flow.

Does the 21803 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The RETAINER,BEARING conforms to its applicable AN (Air Force-Navy), MS (Military Standard), or NAS (National Aerospace Standard) specification. Contact us for specific specification details.

What material is the 21803 manufactured from?

Aviation hardware is available in various materials including cadmium-plated steel, stainless steel, aluminum alloy, and titanium depending on the application. Contact us for material certification and specifications for the 21803.

Can I order the 21803 in custom quantities?

Yes, we sell hardware in various quantities from single units to bulk lots. The RETAINER,BEARING is available in: Overhauled. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.