Product Details
The Flexfab 5780-038 is a red silicone + meta-aramid 4-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.
Performance & Construction
| Construction | Red silicone + meta-aramid 4-ply |
| Inside Diameter | 0.38″ (10 mm) |
| Outside Diameter | 0.77″ (20 mm) |
| Actual Burst Pressure | 600 PSI |
| Working Pressure | ~200 PSI (1/3 of burst) |
| Temperature Range | -65F to +500F |
| Wall Thickness | 0.17″/0.22″ |
| Standards | SAE J20 R1 H.T. |
| Origin | Made in USA |
Why this hose
- Red silicone + meta-aramid 4-ply — durable construction engineered for demanding cooling-system service.
- -65F to +500F 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 H.T. — engineered to recognized heavy-duty hose standards.
Frequently asked questions
Flexfab 5780 Series — Complete Size Chart
Every size in the series. Click a part number to open that product.
| Part | ID (in) |
ID (mm) |
OD (in) |
OD (mm) |
Actual Burst |
SAE | TMC | Weight (lb/ft) |
|---|---|---|---|---|---|---|---|---|
| 5780‑038 5780‑038X12 |
0.38″ | 10 | 0.77″ | 20 | 600 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑050 5780‑050X12 |
0.50″ | 13 | 0.89″ | 23 | 600 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑062 5780‑062X12 |
0.63″ | 16 | 1.02″ | 26 | 575 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑075 5780‑075X12 |
0.75″ | 19 | 1.14″ | 29 | 575 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑087 5780‑087X12 |
0.88″ | 22 | 1.27″ | 32 | 550 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑100 5780‑100X12 |
1.00″ | 25 | 1.39″ | 35 | 550 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑112 | 1.13″ | 29 | 1.52″ | 39 | 500 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑125 5780‑125X12 |
1.25″ | 32 | 1.64″ | 42 | 500 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑138 5780‑138X12 |
1.38″ | 35 | 1.77″ | 45 | 450 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑150 | 1.50″ | 38 | 1.89″ | 48 | 450 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑175 | 1.75″ | 44 | 2.14″ | 54 | 400 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑200 5780‑200X12 |
2.00″ | 51 | 2.39″ | 61 | 400 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑225 5780‑225X12 |
2.25″ | 57 | 2.64″ | 67 | 350 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑250 5780‑250X12 |
2.50″ | 64 | 2.89″ | 73 | 300 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑262 | 2.63″ | 67 | 3.13″ | 79 | 275 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑275 | 2.75″ | 70 | 3.25″ | 83 | 275 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
| 5780‑300 | 3.00″ | 76 | 3.50″ | 89 | 250 PSI | N/A (J20 R1 H.T.) | — | (not in catalog) |
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