Loom-&-Loom-Clamps > Loom-Clips-&-Connectors

Strain Relief Cord Connectors - NPT Flex Type

Wire Strain Relief Connector

Secure and protect your connections with a wire strain relief connector. These connectors are designed to secure a power supply cord to a piece of electrical equipment. With a liquid-tight seal, the wire strain relief connector securely protects the connected end of the wire. The flexible coil design of the wire strain relief connector greatly reduces wire stress at the connection point, to keep your connection healthy and lasting. This flexible body also helps prevent any cable kinking that could compromise your connection. Manufactured with nylon and a TPE gland seal, the wire strain relief connector protects from dust, salt, water, weak acids, alcohol, gas, minerals, and other oils. Easily create a secure, flexible, and long lasting connection with a wire strain relief cord connector from Del City.


  • Internationally approved: UL #E51579, CSA #93876C, IP 68.
  • Liquid tight, optimum seal connector with vibration proof protection (up to 70 psi).
  • Resistant to salt water, weak alkalis, alcohol, gasoline, grease, and common solvents.
  • Working Temperature: -4° F(-20°C) to 212°F (100°C).
  • Locknuts not included.
  • NPT Flex Type Connector Specs

Item Description Price
1+ I Ext. Price I 500+ Ext. Price I I 1000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
2738 Heyco 3254, Strain Relief Cord Connectors - 3/8" (.181" - .312") - Flex
2.20600 2.21 I 1.58400 1.58 I 1.28300 1.28
1 EA ✓
2712 Heyco 3251, Strain Relief Cord Connectors - 1/2" (.170" - .470") - Flex
2.85700 2.86 I 2.04900 2.05 I 1.60400 1.60
1 EA ✓
3712 Heyco 3266, Strain Relief Cord Connectors - 1/2" (.230" - .546") - Flex
2.85700 2.86 I 2.04900 2.05 I 1.60400 1.60
1 EA ✓
3734 Heyco 3462, Strain Relief Cord Connectors - 3/4" (.250" - .485") - Flex
5.28900 5.29 I 3.72600 3.73 I 3.04300 3.04
1 EA ✓
2734 Heyco 3239, Strain Relief Cord Connectors - 3/4" (.450" - .709") - Flex
5.28900 5.29 I 3.72600 3.73 I 3.04300 3.04
1 EA ✓

Strain Relief Power Cord Connectors - STD NPT Thread

Power Cord Strain Relief Connector - STD NPT Thread

Power cord strain relief connectors have a STD NPT thread and is designed to secure a power supply cord to a piece of electrical equipment. This power cord strain relief connector provides a liquid-tight seal on the power cord entry and reduces wire stress at connection point.


  • Liquid tight strain relief cord connectors feature vibration proof protection (up to 70 psi) and an optimum seal.
  • Internationally approved: UL #E51579, CSA #93876C, IP 68
  • Dust protection and resistant to salt water, weak alkalis, alcohol, gasoline, grease, and common solvents.
  • Standard dome nut for strain relief only.
  • Working Temperature: -4° F(-20°C) to 212°F (100°C).
  • NPT nut required. (not included)
  • STD NPT Thread Dims
Item Description Price
1+ I Ext. Price I 500+ Ext. Price I I 1000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
3614 Heyco M4514, Strain Relief Cord Connectors - 1/4" (.065" - .210") - NPT
1.66600 1.67 I 1.29400 1.29 I 1.06600 1.07
1 EA ✓
3014 Heyco M4516, Strain Relief Cord Connectors - 1/4" (.115" - .250") - NPT
1.66600 1.67 I 1.29400 1.29 I 1.06600 1.07
1 EA ✓
3638 Heyco 3458, Strain Relief Cord Connectors - 3/8" (.069" - .187") - NPT
1.72800 1.73 I 1.34600 1.35 I 1.03200 1.03
1 EA ✓
2638 Heyco 3228, Strain Relief Cord Connectors - 3/8" (.115" - .312") - NPT
1.72800 1.73 I 1.34600 1.35 I 1.03200 1.03
1 EA ✓
2612 Heyco 3231, Strain Relief Cord Connectors - 1/2" (.170" - .450") - NPT
2.21600 2.22 I 1.67700 1.68 I 1.29400 1.29
1 EA ✓
3612 Heyco 3200, Strain Relief Cord Connectors - 1/2" (.230" - .546") - NPT
2.21600 2.22 I 1.67700 1.68 I 1.29400 1.29
1 EA ✓
3634 Heyco 3460, Strain Relief Cord Connectors - 3/4" (.250" - .485") - NPT
3.18800 3.19 I 2.29800 2.30 I 1.77 1.77
1 EA ✓
2634DL Heyco 3234, Strain Relief Cord Connectors - 3/4" (.450" - .709") - NPT
3.18800 3.19 I 2.29800 2.30 I 1.77 1.77
1 EA ✓
3001 Heyco M8439, Strain Relief Cord Connectors - 1" (.490" - .785") - NPT
7.36900 7.37 I 5.56800 5.57 I 4.52300 4.52
1 EA ✓
2601 Heyco 8437, Strain Relief Cord Connectors - 1" (.590" - 1.00") - NPT
7.36900 7.37 I 5.56800 5.57 I 4.52300 4.52
1 EA ✓
3644 Heyco M4522, Strain Relief Cord Connectors - 1-1/4" (.787" - 1.020") - NPT
11.56100 11.56 I 9.43900 9.44 I 7.84600 7.85
1 EA ✓
2644 Heyco M4524, Strain Relief Cord Connectors - 1-1/4" (.865" - 1.260") - NPT
11.56100 11.56 I 9.43900 9.44 I 7.84600 7.85
1 EA ✓

Strain Relief Cord Connector Nuts - NPT

NPT Strain Relief Cord Connector Nut

This NPT strain relief cord connector nut is required for use on STD NPT strain relief cord connectors. This locking nut completes the connection of a STD NPT cord connector to a power cord, providing a liquid-tight seal that prevents moisture or any other damaging liquid from ruining the power cord connection.


  • NPT nut required for use on Std NPT Thread Strain Relief Cord Connector.
  • Std NPT Thread internationally approved: UL #E79903, CSA #LR50370-10, VDE #57986, SEV #100989
  • Working Temperature: -22° F(-30°C) to 221°F (105°C).
  • NPT Nuts Connector Specs
Item Description Price
1+ I Ext. Price I 500+ Ext. Price I I 1000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
2615 Heyco M9142, NPT Locking Nut, 1/4"
0.48800 0.49 I 0.29700 0.30 I 0.22800 0.23
1 EA ✓
2639 Heyco 8461, NPT Locking Nut, 3/8"
0.63300 0.63 I 0.43900 0.44 I 0.34800 0.35
1 EA ✓
2613 Heyco 8463, NPT Locking Nut, 1/2"
0.57700 0.58 I 0.38 0.38 I 0.27200 0.27
1 EA Call
2635 Heyco 8465, NPT Locking Nut, 3/4"
0.82300 0.82 I 0.61700 0.62 I 0.47800 0.48
1 EA ✓
2602DL Heyco 8467, NPT Locking Nut, 1"
1.82200 1.82 I 1.50100 1.50 I 1.22100 1.22
1 EA ✓
2645 Heyco M9144, NPT Locking Nut, 1-1/4"
2.15300 2.15 I 1.61600 1.62 I 1.29400 1.29
1 EA ✓

Strain Relief Cord Connectors - PG Flex Type

PG Flex Type Strain Relief Connector

The flexible strain relief cord connector is unique because it features a partially flexible body that helps prevent cable kinking and sharp bends which extends cable life. It is recommended to use the cordgrip with the smallest maximum diameter that will fit your application. Flamability Rating: 94V-2.


  • Liquid tight strain relief cord connectors feature vibration proof protection (up to 70 psi) and an optimum seal.
  • Internationally approved: UL #E51579, CSA #93876C, IP 68.
  • Resistant to salt water, weak acids, alcohol, gasoline, oil, grease, and common solvents.
  • PG hub threads are steel conduit threads per DIN 40430.
  • Working Temperature: -4° F(-20°C) to 212°F (100°C).
  • Unassembled Nylon Locknut INCLUDED.
  • PG Flex Type Connector Specs
Item Description Price
1+ I Ext. Price I 500+ Ext. Price I I 1000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
2751 Heyco 3237, Strain Relief Cord Connectors - PG 7 Flex (.114" - .250")
2.66 2.66 I 1.99800 2.00 I 1.58400 1.58
1 EA ✓
2750 Heyco 3240, Strain Relief Cord Connectors - PG 9 Flex (.181" - .312")
2.53600 2.54 I 1.89400 1.89 I 1.51100 1.51
1 EA ✓
2753 Heyco 3246, Strain Relief Cord Connectors - PG 13.5 Flex (.170" - .450")
3.32200 3.32 I 2.50600 2.51 I 1.98700 1.99
1 EA ✓
2756 Heyco 3454, Strain Relief Cord Connectors - PG 21 Flex (.450" - .709")
5.41300 5.41 I 4.04700 4.05 I 3.25 3.25
1 EA ✓

Strain Relief Power Cord Connectors - STD PG Thread

Power Cord Strain Relief Connector - STD PG Thread

These power cord strain relief connectors have a STD PG thread and is designed to secure a power supply cord to a piece of electrical equipment. The STD PG thread cable strain relief provides a liquid-tight seal on the power cord entry and reduces wire stress at connection point.


  • Liquid tight strain relief cord connectors feature vibration proof protection (up to 70 psi) and an optimum seal.
  • Std PG Thread 6/6 Nylon w/ TPE gland. UL listed under #E-51579, CSA #LR-93876.
  • Resistant to salt water, weak alkalis, alcohol, gasoline, grease, and common solvents.
  • Standard dome nut for strain relief only.
  • Working Temperature: -4° F(-20°C) to 212°F (100°C).
  • Unassembled Nylon Locknut INCLUDED.
  • STD PG Thread Connector Specs
Item Description Price
1+ I Ext. Price I 500+ Ext. Price I I 1000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
3651 Heyco 3444, Strain Relief Cord Connectors - PG 7 (.064" - .210")
1.65600 1.66 I 1.24200 1.24 I 0.98900 0.99
1 EA ✓
3650 Heyco 3446, Strain Relief Cord Connectors - PG 9 (.069" - .187")
1.81100 1.81 I 1.44900 1.45 I 1.08700 1.09
1 EA ✓
2650 Heyco 3210, Strain Relief Cord Connectors - PG 9 (.181"- .312")
1.81100 1.81 I 1.44900 1.45 I 1.08700 1.09
1 EA ✓
3652 Heyco 3448, Strain Relief Cord Connectors - PG 11 (.069" - .260")
2.15300 2.15 I 1.61600 1.62 I 1.28300 1.28
1 EA ✓
2652 Heyco 3213, Strain Relief Cord Connectors - PG 11 (.230" - .395")
2.15300 2.15 I 1.61600 1.62 I 1.28300 1.28
1 EA ✓
2653 Heyco 3216, Strain Relief Cord Connectors - PG 13.5 (.170"- .450")
2.38100 2.38 I 1.89400 1.89 I 1.44900 1.45
1 EA ✓
2654 Heyco 3219, Strain Relief Cord Connectors - PG 16 (.230" - .546")
2.83600 2.84 I 2.11100 2.11 I 1.69700 1.70
1 EA ✓
3656 Heyco 3454, Strain Relief Cord Connectors - PG 21 (.250" - .485")
3.31200 3.31 I 2.78400 2.78 I 2.21600 2.22
1 EA ✓
2656 Heyco 3222, Strain Relief Cord Connectors - PG 21 (.450"- .709")
3.31200 3.31 I 2.78400 2.78 I 2.21600 2.22
1 EA ✓
2659 Heyco 3225, Strain Relief Cord Connectors - PG 29 (.590"- .990")
5.81700 5.82 I 4.85400 4.85 I 4.00600 4.01
1 EA ✓

Strain Relief Cord Connectors - Sealing Washer

Sealing Washer

Nylon 6/6 sealing washers will provide a liquid tight, dust tight, and oil tight seal at the enclosure. Washers are ideal for wet locations that require a separate gasket between the box and fitting. The washer will aso make your connector suitable for several other panel sealing applications. The washer is easy to install, and it has special double sealing ridges to compensate for minor unevenness at the enclosure. Flammability Rating: 94V-2.


Item Description Price
1+ I Ext. Price I 500+ Ext. Price I I 1000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
3615 Heyco 3258, Strain Relief Cord Sealing Washer, 1/4"
1.52100 1.52 I 1.13900 1.14 I 0.91300 0.91
1 EA ✓
3639 Heyco 3259, Strain Relief Cord Sealing Washer, 3/8"
1.48 1.48 I 1.10700 1.11 I 0.88 0.88
1 EA ✓
3613 Heyco 3260, Strain Relief Cord Sealing Washer, 1/2"
1.18 1.18 I 0.90200 0.90 I 0.70600 0.71
1 EA ✓
3635 Heyco 3261, Strain Relief Cord Sealing Washer, 3/4"
1.34600 1.35 I 1.01100 1.01 I 0.80400 0.80
1 EA ✓
3602 Heyco 3262, Strain Relief Cord Sealing Washer, 1"
2.45300 2.45 I 1.84200 1.84 I 1.47 1.47
1 EA ✓
3645 Heyco 3264, Strain Relief Cord Sealing Washer, 1-1/4"
2.15300 2.15 I 1.61600 1.62 I 1.29400 1.29
1 EA ✓
Prop65 Warning