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O-RINGS AN6230B-2 MS28775-224

Part# AN6230B-2
MFR Model# MS28775-224
PNMS EquivalentWidthIDOD


O-rings give effective sealing over wide ranges of pressure, temperature, and movement, with the advantage of sealing pressure in both directions and reducing friction and wear on moving parts. The use of O-rings as gaskets or static seals permits metal-to-metal contact and allows almost unlimited pressures under extreme vibration.

All O-rings should be lubricated before installation and constant lubrication should be provided for running seals to avoid excessive wear. Avoid sharp edges, threads, and cross-drilled ports over or through which rings must be installed. AN6227B and AN6230B O-rings are manufactured to Spec. MIL-P 25732 for use in hydraulic systems using MIL-0-5606 hydraulic oils. MS28775 O-rings meet Spec. MIL-P- 5510A and are suitable for MIL-0-5606 hydraulic fluid at 160 F.
California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.

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The part arrived quickly, was in excellent condition, and was the correct dimensions required for the job.

Nancy E Verified Purchase

O-RINGS AN6230B-2 MS28775-224

April 6, 2022

Adam Verified Purchase

O-RINGS AN6230B-2 MS28775-224

March 19, 2022

great Product

Usa I Verified Purchase

O-RINGS AN6230B-2 MS28775-224

March 12, 2022


Crafton M Verified Purchase

O-RINGS AN6230B-2 MS28775-224

January 14, 2022

Exact fit for my brake piston.

Timothy R Verified Purchase

O-RINGS AN6230B-2 MS28775-224

September 25, 2021

An O ring is an O ring.

Siskiyou A Verified Purchase

O-RINGS AN6230B-2 MS28775-224

August 19, 2021

just hardware

Keith P Verified Purchase

O-RINGS AN6230B-2 MS28775-224

August 13, 2021

Laurence G Verified Purchase

O-RINGS AN6230B-2 MS28775-224

July 2, 2021

Good replacement o-rings when you need them.

William J Verified Purchase

O-RINGS AN6230B-2 MS28775-224

June 10, 2021

Didnt have a part number and was surprised that your outstanding folks couldnt find it right off hand. Once I called back with the part number, no problem. And your phone folks are always fun to talk to. Ed

Ed W
May 12, 2021


Please note, Pilotshop's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Pilotshop assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Can these O rings be used in fuel cells with 100LL fuel?

These o-rings, AN6227B series, are not fuel resistant. For fuel resistant o-rings, see the MS29513 series. MS29513 are aviation fuel resistant, but not resistant to automotive fuel. Search for MS29513 on our web site to find the page with the fuel resistant o-rings.

Q: Are the O-rings Butyl rubber?

These are POLYTETRAFLUOROETHYLENE per the mil spec.

Q: What is the shelf life of these o-rings?

15 years per the cert.