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

Flexfab 5415-125, 1.25" x 3 ft, 3-Ply Glossy Blue Silicone Coolant Hose, 32mm

by Flexfab
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$ 73.29
$ 73.29 - $ 73.29
$ 73.29
$ 58.69
$ 58.69 - $ 58.69
$ 58.69
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Quick Specs

BrandFlexfab
Series5415
TypeHose
Body Size1-1/4"
Length3 ft
ColorBlue

Performance & Construction

Construction Glossy silicone hose w/ 3-ply polyester reinforcement
Inside Diameter 1.25" (32 mm)
Outside Diameter 1.57" (40 mm)
Actual Burst Pressure 425 PSI
Working Pressure ~142 PSI (1/3 of burst)
Temperature Range -65F to +350F
Wall Thickness .140"/.190"
Standards SAE J20 R1 Class A; TMC RP303B Class I Grade II
Origin Made in USA

Product Details

Product Details

The Flexfab 5415-125 is a glossy silicone hose w/ 3-ply polyester reinforcement 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

  • Glossy silicone hose w/ 3-ply polyester reinforcement — 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 R1 Class A; TMC RP303B Class I Grade II — engineered to recognized heavy-duty hose standards.

Frequently asked questions

What clamp does it take?
Use the Flexfab 2582‑0020 or 2584‑0175 clamp, sized to this hose’s outside diameter. Two clamps per connection is standard practice.

Flexfab 5415 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
5415‑038 0.38" 10 0.70" 18 500 PSI 425 125 0.12 2582‑0004
5415‑050 0.50" 13 0.82" 21 500 PSI 425 125 0.16 2582‑0006
5415‑062 0.63" 16 0.95" 24 485 PSI 425 125 0.2 2582‑0010
5415‑075 0.75" 19 1.07" 27 475 PSI 325 125 0.24 2582‑0012
5415‑087 0.88" 22 1.20" 30 465 PSI 300 125 0.28 2582‑0012
5415‑100 1.00" 25 1.32" 34 450 PSI 300 125 0.32 2582‑0016
5415‑112 1.13" 29 1.45" 37 435 PSI 300 125 0.36 2582‑0016 or 2584‑0175
5415‑125 1.25" 32 1.57" 40 425 PSI 275 125 0.4 2582‑0020 or 2584‑0175
5415‑138 1.38" 35 1.70" 43 400 PSI 250 125 0.44 2582‑0020 or 2584‑0212
5415‑150 1.50" 38 1.82" 46 375 PSI 250 125 0.48 2582‑0024 or 2584‑0212
5415‑162 1.63" 41 1.95" 50 350 PSI 225 125 0.52 2582‑0024 or 2584‑0212
5415‑175 1.75" 44 2.07" 53 300 PSI 225 125 0.56 2582‑0028 or 2584‑0262
5415‑187 1.88" 48 2.20" 56 250 PSI 200 100 0.6 2582‑0032 or 2584‑0262
5415‑200 2.00" 51 2.32" 59 250 PSI 200 100 0.64 2582‑0032 or 2584‑0262
5415‑225 2.25" 57 2.57" 65 225 PSI 175 100 0.72 2582‑0036 or 2584‑0312
5415‑238 2.38" 60 2.70" 69 210 PSI 150 100 0.76 2582‑0040 or 2584‑0312
5415‑250 2.50" 64 2.82" 72 200 PSI 150 100 0.8 2582‑0040 or 2584‑0312
5415‑275 2.75" 70 3.07" 78 200 PSI 125 100 0.88 2582‑0044 or 2584‑0362
5415‑300 3.00" 76 3.32" 84 200 PSI 100 100 0.96 2582‑0048 or 2584‑0362
5415‑400 4.00" 102 4.32" 110 125 PSI 50 100 1.28 2582‑0064 or 2584‑0462

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. $ 20.49
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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