McCauley Propeller Systems A1633-52 O-Rings

One of the unsung heroes of aircraft maintenance and manufacturing are O-rings. O-rings keep oil and grease in and dirt and grime out of all kinds of things. That said, there are many types of O-rings, and some sensitive applications require a specific O-ring kind and composition. 

McCauley Propeller Systems is one of the best-known propeller brands in the world, and it has been powering airplanes for decades.  

What Are O-Rings Used For? 

O-rings are used all over every machine on the planet, and aircraft are no different. They are typically a means of keeping either a fluid or other type of lubricant within a system. Some are packing for bolts and drain plugs, while others are for the propeller assembly itself. 

In this case, it is an O-ring used in the hub of variable-pitch propellers made by McMauley Propeller Systems. 

Product Description

The McCauley Propeller Systems A1633-52 O-ring is used as a seal within the propeller assembly, specifically in the hub of certain McCauley propellers. 

As with all parts, make sure the A-1633-52 is the correct O-ring for your exact application. With hundreds of Lycoming-powered aircraft in the federal fleets, some of your aircraft likely use this item. We stock it for immediate delivery to complete your propeller maintenance and repair, and get your plane airborne.

Ordering and Availability

The A-1633-52 o-ring set is available for purchase online, with detailed product information and pricing available upon request. Make sure to check out our GSA Advantage listing for McCauley A1633-52 five-packs to get a great, guaranteed price and availability. 

Product Overview

Alright, so let’s talk about these O-rings. Remember, make sure you are only using approved stock and that it is the correct O-ring for the job.

Quality and Standards

The McCauley Propeller Components A-1633-52 is a genuine McCauley aviation part, designed to meet the highest standards of quality and performance. Do not accept any substitutes for your propulsion components, even down to the smallest components like O-rings. 

Stock and Shipping

Greenwood Aerospace maintains a stock of thousands of different items for your aviation maintenance and MRO operations. We work extensively with Textron and its many brands, including selling brand-new and factory-remanufactured Lycoming engines, which we will also be selling through GSA Advantage! All eligible federal, state, and even some local agencies can get a guaranteed price for items as small as an O-ring, up to a complete Lycoming piston engine. 

No haggling. 

No red tape. 

Just one guaranteed price point.  

We stock McCauley A1633-52 in packs of five to complete your propeller overhaul or as standard bench stock. 

O-Ring Specifications

Part Number and Compatibility

  • Part Number: A1633-52

  • Manufacturer: McCauley Propeller Systems (a division of Textron Aviation)

  • Pack Size: 5 O-rings per pack

  • Function: Propeller hub seal for select McCauley variable-pitch models

  • Material: Aircraft-grade elastomer (material type subject to specific aircraft model requirements)

This product is compatible with a range of McCauley propeller models and is designed to provide a secure and reliable seal under varying RPM and pressure conditions. As always, reference your aircraft maintenance manual or contact your aircraft OEM support team to confirm compatibility.

Shop McCauley A1633-52 O-Rings Now on GSA Advantage

Greenwood Aerospace is proud to support aviation maintenance professionals across the federal and defense sectors. Our parts inventory includes everything from McCauley propeller parts, such as the A1633-52, to complete Lycoming engines and consumables for both shop and flightline use.

Order your A1633-52 O-rings today and keep your fleet airworthy, safe, and mission-ready.

Greenwood Aerospace is Your Military Procurement Partner!

When you serve this country as a military procurement professional, you want to fill your cart with parts sourced through Greenwood Aerospace. We have been in the business for over 40 years and have served every branch of the military, as well as numerous federal government agencies. 

You can start this online quote today, or you can reach out to Greenwood Aerospace at gsasales@greenwood.aero or give us a call at 580-865-6000 or 833-GSA-EBUY (833-472-3289).

Greenwood Aerospace is a U.S. Department of State ITAR-registered company, which enables us to partner with large defense contractors on various military initiatives involving the export of ITAR-controlled items. We hold the following certifications:

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UEI: KVSUYYSJS174

DUNS: 604006874

Cage Code: 2Y735

ITAR DDTC Export Compliant

AS9120B QMS Certified

NAICS: 488190, 336413, 332722, 336411, 336413, 481212, 532411