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Home / Hardware / Washers /Countersunk Washers
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Countersunk Washers

44 Reviews 3 Answered Questions
From $0.29 to $0.38
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MFG No. PN Screw Size I.D.
(in.)		 O.D.
(in.)		 Approx.
Thickness		 Price Price per
100		 Buy
A3236-012-193
A3236-012-193
6.140.500.016"$0.38--
Quantity
A3135-017-193
A3135-017-193
8.171.560.024"$0.29$23.00
Quantity
A3235-028-193
04-02036
10.196.750.035"$0.37$30.00
Quantity
Subtotal $0.00
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Overview

Washers for use with 100° flat-head screws such as MS24693 and MS24694 machine screws and NAS548 sheet metal screws to provide reinforced, low-profile attachments. Made of spring steel, Zinc plated.
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Reviews

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Richard D Verified Purchase

Washer A3235-028-193 Tinnerman
October 12, 2024

Richard D Verified Purchase

Tinnerman Washer Alt.FW135-17
October 12, 2024

Richard D Verified Purchase

Tinnerman Washer A3236-012-193
October 12, 2024

I use the 1.25 inch diameter cone shaped washers to fasten rigid cement board to substrate plywood and substrate rigid insulation board, so fasteners be flush-mounted to the finished surface. The 0.75 inch diameter washers are too small for this purpose. May i suggest to restore the availability of the 1.25 inch diameter units.

Ed M Verified Purchase

Washer A3235-028-193 Tinnerman
October 11, 2024

Michel C Verified Purchase

Washer A3235-028-193 Tinnerman
July 9, 2024

Michel C Verified Purchase

Tinnerman Washer Alt.FW135-17
July 9, 2024

Ronnie M Verified Purchase

Tinnerman Washer Alt.FW135-17
July 9, 2024

Perfect for a short wing Piper cowl!

Dan P Verified Purchase

Washer A3235-028-193 Tinnerman
June 6, 2024

Steve S Verified Purchase

Washer A3235-028-193 Tinnerman
March 6, 2024

Kent B Verified Purchase

Washer A3235-028-193 Tinnerman
February 24, 2024

Q&A

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Please note, Aircraft Spruce Canada'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 Canada 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 material thickness of these countersunk washers?

Approximate material thicknesses: #6 = 0.016", #8 = 0.024", #10 = 0.035", 1/4 = 0.035".

Q: Are these Tinnerman countersunk washers silver in color or yellow?

These washers are silver.

Q: What size countersink tool should be used?

For this particular part number you would want a .140-.147" hole, a #28 or #27 drill would work.

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