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Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant

Flexfab 5934-112x150, 1-1/8" ID x 150 ft Spool Premium Blue Silicone Heater Hose, 29mm 350F Radiator Coolant

by Flexfab
Save 20% Save 20%
$ 38,510.00
$ 38,510.00 - $ 38,510.00
$ 38,510.00
$ 30,808.00
$ 30,808.00 - $ 30,808.00
$ 30,808.00
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Quick Specs

BrandFlexfab
Series5934
TypeHose
Body Size1-1/8"
Length150 ft
ColorBlue

Performance & Construction

Construction Blue silicone premium, 1-ply
Inside Diameter 1.13" (29 mm)
Outside Diameter 1.52" (38 mm)
Actual Burst Pressure 250 PSI
Working Pressure ~83 PSI (1/3 of burst)
Temperature Range -65F to +350F
Wall Thickness -
Standards SAE J20 R3 Class A; TMC RP303B Cl I Gr II
Origin Made in USA

Product Details

Product Details

The Flexfab 5934-112x150 is a blue silicone premium, 1-ply 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 premium, 1-ply — 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 2582‑0020 clamp, sized to this hose’s outside diameter. Two clamps per connection is standard practice.

Flexfab 5934 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
5934‑112X25
5934‑112X50
5934‑112X150 		1.13" 29 1.52" 38 250 PSI 275 125 0.438 2582‑0020

Pairs With

Flexfab 2582-0020 Lined Worm Gear Clamp, 0.88"–1.25" ID, 300 SS, 10 Per Box Flexfab 2582-0020 Lined Worm Gear Clamp The matching half for this connection. Most buyers need both. $ 361.00
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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