Heyco Strain Reliefs - Pigtail with Integral Nylon Spring

Material: Nylon 6/6

Certifications:

File E15331

File 8919

Flammability Rating: 94V-2

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

Integral nylon spring eases the cable into a lazy bend; prevents sharp bending and assures longest cable and product life.
Adds reliability, longevity and safety. Will pass CSA's 50,000 cycle "vacuum cleaner" test (C22.2 No.67).
Protects the lifeline of your electric/electronic products by absorbing forces of pull, push, twist, and flex.
Securely anchors, insulates, and protects cables at panel entry points.
Not recommended for applications where the power supply cord is subject to whipping or "jump rope" type motion.
Fill blank/unused mounting holes with Heyco Double D Plugs.
Part markings

Heyco^® Original Strain Relief Bushings
Pigtail with Integral Nylon Spring, for Flat and Round Cables
Will Fit These Cables	Panel Dimensions	Part Number	UL/CSA Designation	Part Dimensions
For Flat Cables
SPT-1	18/3	.12 x .30	3,0 x 7,6	.500	12,7	.465	11,8	.062	1,6	1541	1542	SR 4N-7	1.718	43,6	1.984	50,4
SPT-2 & HPN	18/2	.15 x .28	3,8 x 7,1
For Round Cables
SV & SVT	18/2	.250	6,4	.500	12,7	.450	11,4	.062	1,6	1590	1591	SR 5N-7	1.703	43,3	1.984	50,4
18/3	.255	6,5	.500- .515	12,7- 13,1
HPD	18/2	.270	6,9	.500	12,7
16/2	.290	7,4	.500- .515	12,7- 13,1
Same as SR 5N-7 above except	.125	3,2	1593	1594	SR 5P-7	1.703	43,3	1.984	50,4
SJ, SJO & SJT	18/2	.300	7,6	.625	15,9	.550	14,0	.062	1,6	1596	1597	SR 6N-7	1.718	43,6	2.109	53,6
Same as SR 6N-7 above except	.125	3,2	1602	1603	SR 6P-7	1.718	43,6	2.109	53,6
SJ, SJO & SJT	16/2 18/3 14/2 16/3 18/4	.315 .320 .350 .355 .360	8,0 8,1 8,9 9,0 9,1	.625	15,9	.550	14,0	.062	1,6	1599	1600	SR 6N3-7	1.718	43,6	2.109	53,6
Same as SR 6N3-7 above except	.125	3,2	1605	1606	SR 6P3-7	1.718	43,6	2.109	53,6
1604	–	SR 6P3-7S *
SJT SJT & SJTO	18/4 14/3	.360 .370	9,1 9,4	.750	19,1	.660	16,8	.125	3,2	1611	1612	SR 7P-7	2.156	54,8	2.598	66,0
S & ST	18/2 18/3 16/2	.390 .405 .405	9,9 10,3 10,3
16/3	.430	10,9	.750- .781	19,0- 19,8

Heyco^® Original Strain Relief Bushings
Pigtail with Integral Nylon Spring, for Flat and Round Cables

Will Fit These Cables

Panel Dimensions

Part
Number

UL/CSA
Designation

Part Dimensions

UL Type Designation

AWG/ Conductors

Approximate Size

A
Mounting Hole
Diameter

B
To Prevent
Rotation

¹Finished Fit
Panel Thickness

C
Extension Length

D
Body Length

in.

mm.

in.

mm.

in.

mm.

in.

mm.

Black

White

in.

mm.

in.

mm.

For Flat Cables

SPT-1

18/3

.12 x .30

3,0 x 7,6

.500

12,7

.465

11,8

.062

1,6

1541

1542

SR 4N-7

1.718

43,6

1.984

50,4

SPT-2 & HPN

18/2

.15 x .28

3,8 x 7,1

For Round Cables

SV & SVT

18/2

.250

6,4

.500

12,7

.450

11,4

.062

1,6

1590

1591

SR 5N-7

1.703

43,3

1.984

50,4

18/3

.255

6,5

.500-
.515

12,7-
13,1

HPD

18/2

.270

6,9

.500

12,7

16/2

.290

7,4

.500-
.515

12,7-
13,1

Same as SR 5N-7 above except

.125

3,2

1593

1594

SR 5P-7

1.703

43,3

1.984

50,4

SJ, SJO & SJT

18/2

.300

7,6

.625

15,9

.550

14,0

.062

1,6

1596

1597

SR 6N-7

1.718

43,6

2.109

53,6

Same as SR 6N-7 above except

.125

3,2

1602

1603

SR 6P-7

1.718

43,6

2.109

53,6

SJ, SJO & SJT

16/2
18/3
14/2
16/3
18/4

.315
.320
.350
.355
.360

8,0
8,1
8,9
9,0
9,1

.625

15,9

.550

14,0

.062

1,6

1599

1600

SR 6N3-7

1.718

43,6

2.109

53,6

Same as SR 6N3-7 above except

.125

3,2

1605

1606

SR 6P3-7

1.718

43,6

2.109

53,6

1604

–

SR 6P3-7S *

SJT
SJT & SJTO

18/4
14/3

.360
.370

9,1
9,4

.750

19,1

.660

16,8

.125

3,2

1611

1612

SR 7P-7

2.156

54,8

2.598

66,0

S & ST

18/2
18/3
16/2

.390
.405
.405

9,9
10,3
10,3

16/3

.430

10,9

.750-
.781

19,0-
19,8