Model Engine Company of America
SPINNER NUTS
Be sure to scroll to see HEX, BULLET, and FLANGED BULLET Spinner Nuts
MECOA has a large selection of aluminum and brass safety and bullet spinner nuts.
02-22-2022
MECOA SAFETY SPINNER NUTS WITH FULL RADIUS NOSE

Each is made on one of MECOA's computer controlled turning machines
in virtually every US and metric thread size and hex combination.

Do you have a tail heavy plane?
Try our brass spinner nut and add the weight at the best place, far forward so you don't have to add as much.

These also act as a flywheel so your engine will idle more reliably.

HEX
size

THREAD
size

ALUMINUM

BRASS

Part Number

Weight (grams)

Part Number
Weight (grams)

1/2"

5x.8 mm

4.6

12

1/2"

6x32

4

12

1/2"
7x1 mm
3.9
12

1/2"

10x32

3.7

12

1/2"

1/4x28

3.5

12

5/8"

5x.8 mm

9.2

27.5

5/8"

6x1 mm

8.3

24.9

5/8"

7x1 mm

8.2

24.9

5/8"

8x1 mm

7.7

23.1

5/8"

8x1.25 mm

7.7

23.1

5/8"

10x32

9.5

28

5/8"

1/4x28

8.6

26

5/8"

5/16x24

7.7

23.1

3/4"

5x.8 mm

15.8

924-403

45

3/4"

6x1 mm

15

45

3/4"

7x1 mm

14.5

43.5

3/4"

8x1 mm

14

42.5

3/4"

8x1.25 mm

14.2

43

3/4"

10x32

15.5

46

3/4"

1/4x28

14.8

43.8

3/4"

5/16x24

14

42.5

3/4"

3/8x24

14

40.3

7/8"

6x1 mm

20.7

62

7/8"

7x1 mm

20.3

60.8

7/8"

8x1 mm

20

60

7/8"

8x1.25 mm

19.7

58.5

7/8"

1/4x28

20.6

61.5

7/8"

5/16x24

19.7

58.5

7/8"

3/8x24

18.3

58.5

1"

8x1 mm

29.8

89

1"

8x1.25 mm

30

90

1"

10x1.25 mm

28.3

84

1"

1/4x28

30.5

91.5

1"

5/16x24

30

88.5

1"

3/8x24

28.5

84.2

 

FOX BULLET SPINNER NUTS
in Aluminum

Fox bullet style spinner nuts give that realistic look.

Approximate
DIAMETER
Approximate
LENGTH

THREAD
size

ALUMINUM

Part Number

Weight (grams)

.500"
.440"

8-32

.600"
.920"

10-32

.960"
1.120"
1/4x28
20
.960"
1.120"

5/16x24

20
.600"
.920"

5x.8

.700"
.825"

5x.8 mm

8
.700"
.825"
6x1 mm
8
.960"
1.120"

6x1 mm

20
.960"
1.120"
7x1 mm
20
.960"
1.120"

8x1.25 mm

20
.960"
1.120"

8x1 mm

20
 

WEBRA FLANGE BACK BULLET SPINNER NUTS
in Aluminum

WEBRA Flange Style bullet style spinner nuts give are a style for
Model Engines for 50 years.

Approximate
DIAMETER

Approximate
LENGTH

THREAD
size

ALUMINUM

Part Number

Weight (grams)

28mm
25mm
1/4x28
17
28mm
25mm

8x1.25 mm

17
28mm
25mm

8x1

17
 
Steel 1/2a Spinner nuts
COX Style 5-40 Thread Engine Spinner Nut Made by MECOA in USA Fits COX Engines

For COX 5-40 Thread - 7/16" Hex 5/8" long
Picture shows side and bottom view.

Made from steel and chrome plated.

Approx. 8.5 grams

Part number 924-cx

8-32 Thread Spinner Nut Fits most Wen-Mac FOX Atwood .049 Engines. Same as pictured above.

For 8-32 Thread - 7/16" Hex 5/8" long
Picture above shows side and bottom view.

Fits most WEN-MAC, FOX, and Atwood .049's

We have found some early engines with a different thread
size so be sure and check your engine before ordering.

Made from steel and chrome plated.

Approx. 8.5 grams

Part number 924-as

Special Spinner Nuts


NEW 1/2" HEX BULLET STYLE SPINNER NUTS

While supply lasts. We are discontintuning these.


6x32
5x.8mm
1/4x28
6x1mm
10x32