Insultherm Ultra Flex
Protect Exposed Wires and Cables from Engine & Exhaust
Insultherm® Ultra Flex® fiberglass sleeving provides reliable protection for wires and hoses exposed to the intense heat generated by high‑performance engines and exhaust systems. The heat‑treated fiberglass construction delivers outstanding thermal resistance, while remaining highly flexible and easy to cut with standard scissors.
Designed for convenience and precision, Ultra Flex® expands slightly to slide smoothly over wires, hoses, and curved surfaces without binding or fraying. Available in Natural, it offers durable, long‑lasting performance in demanding heat‑exposed environments.
Features
- Continuous Filament E-Type Glass
- Resists Abrasion, Vibration, and Mechanical Stress
- Easy to Install - Cuts with Scissors
- Stays Flexible in Low Temperatures
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Product Sizes |
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Nominal Size |
Part Number |
Min Expansion |
Max Expansion |
Wall Max |
Shop Spool |
Bulk Spool |
Price and Availability |
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24 AWG |
FHNG.24NT |
0.02" |
0.027" |
0.005" |
250' |
500' |
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|
22 AWG |
FHNG.22NT |
0.025" |
0.032" |
0.005" |
250' |
500' |
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|
20 AWG |
FHNG.20NT |
0.032" |
0.039" |
0.009" |
250' |
500' |
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|
18 AWG |
FHNG.18NT |
0.04" |
0.049" |
0.011" |
250' |
500' |
|
|
17 AWG |
FHNG.17NT |
0.045" |
0.054" |
0.011" |
250' |
500' |
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16 AWG |
FHNG.16NT |
0.051" |
0.061" |
0.011" |
250' |
500' |
|
|
14 AWG |
FHNG.14NT |
0.064" |
0.074" |
0.011" |
250' |
500' |
|
|
13 AWG |
FHNG.13NT |
0.072" |
0.082" |
0.011" |
250' |
500' |
|
|
12 AWG |
FHNG.12NT |
0.081" |
0.091" |
0.011" |
100' |
250' |
|
|
11 AWG |
FHNG.11NT |
0.091" |
0.101" |
0.011" |
100' |
250' |
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10 AWG |
FHNG.10NT |
0.102" |
0.112" |
0.011" |
100' |
250' |
|
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9 AWG |
FHNG.09NT |
0.114" |
0.124" |
0.011" |
100' |
250' |
|
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8 AWG |
FHNG.08NT |
0.129" |
0.141" |
0.011" |
100' |
250' |
|
|
7 AWG |
FHNG.07NT |
0.144" |
0.158" |
0.013" |
100' |
250' |
|
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6 AWG |
FHNG.06NT |
0.152" |
0.178" |
0.013" |
100' |
250' |
|
|
5 AWG |
FHNG.05NT |
0.182" |
0.198" |
0.013" |
100' |
250' |
|
|
4 AWG |
FHNG.04NT |
0.204" |
0.224" |
0.016" |
100' |
250' |
|
|
3 AWG |
FHNG.03NT |
0.229" |
0.249" |
0.016" |
100' |
250' |
|
|
2 AWG |
FHNG.02NT |
0.258" |
0.278" |
0.016" |
100' |
250' |
|
|
1 AWG |
FHNG.01NT |
0.289" |
0.311" |
0.016" |
50' |
100' |
|
|
0 AWG |
FHNG.00NT |
0.325" |
0.347" |
0.016" |
50' |
100' |
|
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1/4" |
FHN0.25NT |
1/4" |
0.313" |
0.01" |
50' |
100' |
|
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5/16" |
FHN0.31NT |
0.313" |
0.333" |
0.016" |
50' |
100' |
|
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3/8" |
FHN0.38NT |
3/8" |
1/2" |
0.012" |
50' |
100' |
|
|
7/16" |
FHN0.44NT |
0.438" |
0.462" |
0.018" |
50' |
100' |
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1/2" |
FHN0.50NT |
1/2" |
5/8" |
0.013" |
50' |
100' |
|
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5/8" |
FHN0.63NT |
5/8" |
3/4" |
0.024" |
50' |
100' |
|
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3/4" |
FHN0.75NT |
3/4" |
7/8" |
0.024" |
50' |
100' |
|
|
1" |
FHN1.00NT |
1" |
5/4" |
0.024" |
50' |
100' |
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