Tectran HK300 Cross Reference
Tectran HK300 is a Tectran aftermarket part number. The OneTouch Exim replacement is OTX-4CT300S, a heavy-duty constant torque clamp with a clamping range of 2-1/4 in to 3-1/8 in (57–79 mm). It fits the same hose or pipe and installs the same way, so OTX-4CT300S can be ordered wherever Tectran HK300 is called for.

OneTouch replacement
Constant Torque Clamp HD 2.25 in to 3.13 in
Part No. OTX-4CT300S
- Clamping Range 2-1/4 in to 3-1/8 in (57–79 mm)
- Band Width 5/8 in
- Band Material 301 Stainless Steel
OTX-4CT300S specifications (replaces Tectran HK300)
| Clamp Type | Heavy-Duty Constant Torque Clamp |
| Application | Coolant & Heater Hoses |
| Clamping Range | 2-1/4 in to 3-1/8 in (57–79 mm) |
| Hex Size | 3/8 in |
| Torque Rating | 92 in-lbs |
| SAE | 312 |
| Band Width | 5/8 in |
| Band Material | 301 Stainless Steel |
| Screw | 410 Stainless Steel | 3/8 in hex |
| Sold As | Each |
Where the Tectran HK300 clamp is used
Constant torque clamps have a spring washer stack that keeps the clamp tight as the hose expands when hot and shrinks when cold, so coolant and heater lines do not seep after a cold start. OTX-4CT300S is used on coolant & heater hoses.
Other part numbers that match OTX-4CT300S
10 more OEM and aftermarket numbers cross to the same clamp. Any of them can be ordered as OTX-4CT300S.
| Name | Part Number | Type |
|---|---|---|
| Automann | 561.25300 | Aftermarket |
| Automann | 56125300 | Aftermarket |
| Breeze | CT 300 L SS | Aftermarket |
| Breeze | CT300LSS | Aftermarket |
| Excoh | 4CT300S | Aftermarket |
| Gates | 32630 | Aftermarket |
| Norma | 0156 0005 068 | Aftermarket |
| Norma | 1560005068 | Aftermarket |
| Norma | 01560005068 | Aftermarket |
| Tectran | HK300 | Aftermarket |
| Velvac | 022430 | Aftermarket |
Ordering OTX-4CT300S
Send us the Tectran HK300 number with the quantity you need and your delivery country. We reply within 24 hours with price and lead time for OTX-4CT300S.
Questions about this number
Is OTX-4CT300S the same as Tectran HK300?
Yes. OTX-4CT300S matches Tectran HK300: clamping range 2-1/4 in to 3-1/8 in (57–79 mm), band width 5/8 in. If the hose has been changed since the old clamp was fitted, measure the hose outside diameter before ordering.
What size is the Tectran HK300 clamp?
Tectran HK300 fits 2-1/4 in to 3-1/8 in (57–79 mm). The band is 301 Stainless Steel.