Heyco Sealing Washers

Material: Thermoplastic Elastomer

Flammability Rating: 94V-0

Material Temperature Index: 125°C (257°F)–Max. temperature on part not to exceed 105°C (221°F)

For use with Heyco-Flex™ Fittings.
Liquid tight, dust tight and oil tight at enclosure.
Suitable for wet locations requiring a separate gasket between the box and fitting.
Also suitable for other panel sealing applications.
Easy to install since washers seal off on the perimeter, not on the connector threads.
Special double sealing ridges compensate for minor unevenness at enclosure.

Heyco^® Sealing Washers
Will Fit These Electrical Fitting NPT Trade Sizes	Part Number	Description	Part Dimensions
1/4	3258	SW 1/4	.54	13,7	.80	20,2	.13	3,2
3/8	3259	SW 3/8	.67	17,0	1.01	25,7
1/2	3260	SW 1/2	.85	21,6	1.24	31,5
3/4	3261	SW 3/4	1.03	26,2	1.50	38,1	.14	3,4
1	3262	SW 1	1.28	32,5	1.77	45,0	.18	4,6
1-1/4	3264	SW 1-1/4	1.66	42,2	2.16	54,9	.16	4,1
1-1/2	3265	SW 1-1/2	1.86	47,2	2.44	62,0
2	3257	SW 2	2.32	58,9	2.93	74,4	.18	4,6

Heyco^® Sealing Washers

Will Fit These
Electrical Fitting
NPT Trade Sizes

Part
Number

Description

Part Dimensions

A
Inside Diameter

B
Outside Diameter

C
Thickness

Black

in.

mm.

in.

mm.

in.

mm.

1/4

3258

SW 1/4

.54

13,7

.80

20,2

.13

3,2

3/8

3259

SW 3/8

.67

17,0

1.01

25,7

1/2

3260

SW 1/2

.85

21,6

1.24

31,5

3/4

3261

SW 3/4

1.03

26,2

1.50

38,1

.14

3,4

3262

SW 1

1.28

32,5

1.77

45,0

.18

4,6

1-1/4

3264

SW 1-1/4

1.66

42,2

2.16

54,9

.16

4,1

1-1/2

3265

SW 1-1/2

1.86

47,2

2.44

62,0

3257

SW 2

2.32

58,9

2.93

74,4

.18

4,6