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Flexfab 5526-038, 3/8" x 50 ft Blue Silicone Heater Hose, .38"

Flexfab 5526-038, 3/8" x 50 ft Blue Silicone Heater Hose, .38"

by Flexfab
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$ 217.19
$ 217.19 - $ 217.19
$ 217.19
$ 152.03
$ 152.03 - $ 152.03
$ 152.03
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Quick Specs

BrandFlexfab
Series5526
TypeHose
Body Size3/8"
Length50 ft
ColorBlue

Performance & Construction

Construction Blue silicone, 1-ply nylon
Inside Diameter 0.38" (10 mm)
Outside Diameter 0.71" (18 mm)
Actual Burst Pressure 310 PSI
Working Pressure ~103 PSI (1/3 of burst)
Temperature Range -65F to +350F
Wall Thickness .140"/.170"
Standards SAE J20 R3 Class A; TMC RP303B Cl I Gr II
Origin Made in USA

Product Details

Product Details

The Flexfab 5526-038 is a blue silicone, 1-ply nylon hose engineered for demanding engine environments. It resists hardening, cracking, cold leaks, aging, and many chemicals, making it a durable, long-lasting solution for diesel, automotive, marine, agricultural, and industrial cooling systems. The recommended Flexfab clamp for this size is shown in the chart below.

Why this hose

  • Blue silicone, 1-ply nylon — durable construction engineered for demanding cooling-system service.
  • -65F to +350F range — stays flexible in cold and handles under-hood heat without hardening or cracking.
  • Resists hardening, cracking, cold leaks, aging, and many chemicals — long service life where ordinary rubber fails.
  • Meets SAE J20 R3 Class A; TMC RP303B Cl I Gr II — engineered to recognized heavy-duty hose standards.

Frequently asked questions

Is this hose fuel-rated?
No. Silicone heater hose is for coolant, radiator, and heater applications — it is not fuel-resistant. Do not use for fuel or oil lines.

What clamp does it take?
Use the Flexfab 2582‑0006 clamp, sized to this hose’s outside diameter. Two clamps per connection is standard practice.

Flexfab 5526 Series — Complete Size & Clamp Chart

Every size in the series. Click a part number to open that product. The clamp column shows the Flexfab clamp(s) that fit each hose OD.

Part ID
(in)		 ID
(mm)		 OD
(in)		 OD
(mm)		 Actual
Burst		 SAE TMC Weight
(lb/ft)		 Matching
Clamp
5526‑025X25
5526‑025X50
5526‑025X250
5526‑025X800 		0.25" 6 0.58" 15 320 PSI 250 125 0.111 2582‑0004
5526‑031X25
5526‑031X50
5526‑031X600		 0.31" 8 0.64" 16 310 PSI 250 125 0.128 2582‑0006
5526‑038X25
5526‑038X50
5526‑038X250
5526‑038X600 		0.38" 10 0.71" 18 310 PSI 250 125 0.145 2582‑0006
5526‑050X25
5526‑050X50
5526‑050X250
5526‑050X500 		0.50" 13 0.83" 21 310 PSI 250 125 0.181 2582‑0006
5526‑062X25
5526‑062X50
5526‑062X250
5526‑062X400 		0.63" 16 0.96" 24 300 PSI 250 125 0.216 2582‑0008
5526‑075X25
5526‑075X50
5526‑075X250
5526‑075X300 		0.75" 19 1.08" 27 300 PSI 200 125 0.25 2582‑0010
5526‑087X25
5526‑087X50
5526‑087X200 		0.88" 22 1.21" 31 250 PSI 175 125 0.287 2582‑0012
5526‑100X25
5526‑100X50
5526‑100X200 		1.00" 25 1.33" 34 250 PSI 175 125 0.324 2582‑0016
5526‑125X25
5526‑125X50
5526‑125X150 		1.25" 32 1.58" 40 200 PSI 175 125 0.385 2582‑0020

Pairs With

Flexfab 2582-0006 Lined Worm Gear Clamp, 0.375"–0.50" ID, 300 SS, 10 Per Box Flexfab 2582-0006 Lined Worm Gear Clamp The matching half for this connection. Most buyers need both. $ 17.49
FLEXFAB

Industrial silicone hose engineered for heater, coolant, and high temperature service. Genuine Flexfab product with correct part numbers and specifications.

Shop All Flexfab

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