G-8 Washers

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Part# 04-01989


A No. 8 washer with the same O.D. as a No. 10 (0.75). Great for those oversize holes in fairings. Unlike the No. 10 washer with a No. 8 screw, these washers will tighten down on the fairing (not bottom out on the cone) thus providing the proper "clamp up" between the fastener and the fairing.

The G-8 washers are Made in the USA from 304 (1/2 hard) Stainless Steel and are machine tumbled for a shiny finish.
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This is better than the regular Tinnerman washer. The outer edge makes contact with the surface before the inner cup and thus it spreads the pressure more evenly. As a usage tip, I added extra epoxy below the cup that created a mold of the screw hole below the cup and this will create a even more tighter fit and will increase the longevity of the hole.

Phat V Verified Purchase


December 11, 2021

Well made and strong. Used them to fasten plastics on motorcycle

Bruce R
February 12, 2019

I tested this on my wing tip. I absolutely love them. They clamp down on the wing tip very nicely and you should stop tightening them before the screw bottoms out. The washer does the work not the screwhead. You will need to buy the screws that go with the washers.

April 22, 2018

Wasnt what I wanted. I guess I miss-read the description. However, it came in the mail very promptly.

James H
February 3, 2018

Joseph C Verified Purchase


June 17, 2021


Please note, Aircraft Spruce'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. Aircraft Spruce 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: What is the OD of the G-8 Washers?

The outside diameter of the G-8 Washers is 0.75".

Q: What is the overall height of the G-8 washer? What is the nominal thickness of the flange?

Per the supplier: overall height is approximately 0.090", thickness of material approximately 0.020".

Q: What is the countersink angle for these G-8 washers?

These have a 100 degree countersink.

Q: What size, diameter, screw do these G-8 accept?

These washers are designed to be used with #8 countersunk screws, and the O.D. of the washer is as large as a #10 washer.

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