Dave Brown Vortech Adapters for Pattern RC Airplanes

These steel prop adapter nuts include prop washers and are also CNC machined to offer the best possible quality. They are available in different crankshaft threads to fit many engines on the market (see the chart below).

To avoid the problem of long screws, which tend to flex and break at the point where they enter the adapter nut, Dave Brown offers 4 lengths of adapter nuts: Short, Long, X-Long and XX- Long. This allows for the use of shorter screws, which won’t be as likely to flex or break.

Depending on the thickness of your prop and the spinner size, as a general rule, you should always use the longest adapter nut possible.

Use SHORT adapters (see below) with spinners 2 1/2” and under.

Use LONG adapters with 2 3/4” to 3” spinners.

Use X-LONG adapters with 3 1/4” to 4" spinners.

Use XX-LONG adapters with spinners 4 1/2" and up.

Use a LOCK NUT with the adapter nut on 4-stroke engines.

Vortech Adapter Nut Selection Chart

Crank Shaft Dia	Thread	Length of Adapter Nut	Our Product #	Price	Purchase
8-32	8-32	2.75 inch — 6.985cm	DAV4832	$5.95
1/4 inch	28	1.625 inch — 4.1275cm	DAV6428	$5.95
1/4 inch	28	1.25 inch — 3.175cm	DAV9428	$5.95
1/4 inch	28	0.875 inch — 2.2225cm	DAV8428	$5.95
5/16 inch	24	1.625 inch — 4.1275cm	DAV6524	$5.95
5/16 inch	24	1.25 inch — 3.175cm	DAV9524	$5.95
5/16 inch	24	0.875 inch — 2.2225cm	DAV8524	$5.95
3/8 inch	24	1.25 inch — 3.175cm	DAV9324	$5.95
3/8 inch	24	1.625 inch — 4.1275cm	DAV6324	$5.95
5mm	0.8	2.75 inch — 6.985cm	DAV4508	$5.95
6mm	1.0	1.25 inch — 3.175cm	DAV9610	$5.95
6mm	1.0	0.875 inch — 2.2225cm	DAV8610	$5.95
7mm	1.0	2.75 inch — 6.985cm	DAV4710	$8.95
7mm	1.0	1.625 inch — 4.1275cm	DAV6710	$5.95
7mm	1.0	1.25 inch — 3.175cm	DAV9710	$5.95
7mm	1.0	0.875 inch — 2.2225cm	DAV8710	$5.95
8mm	1.0	2.75 inch — 6.985cm	DAV4810	$8.95
8mm	1.0	1.625 inch — 4.1275cm	DAV6810	$5.95
8mm	1.0	1.25 inch — 3.175cm	DAV9810	$5.95
8mm	1.0	0.875 inch — 2.2225cm	DAV8810	$5.95
8mm	1.25	2.75 inch — 6.985cm	DAV4812	$8.95
8mm	1.25	1.625 inch — 4.1275cm	DAV6812	$5.95
8mm	1.25	1.25 inch — 3.175cm	DAV9812	$5.95
10mm	1.0	2.75 inch — 6.985cm	DAV4110	$8.95
10mm	1.0	1.25 inch — 3.175cm	DAV9110	$5.95
10mm	1.25	2.75 inch — 6.985cm	DAV4112	$8.95
10mm	1.25	1.625 inch — 4.1275cm	DAV6112	$5.95

Go to Vortech Lock Nuts for Adapters

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