Dry Break, -4 AN JIC Aluminum, ETP, Brakes
Quick Overview
- Dry break, -4 AN JIC male ends
- Compact body for brake and clutch lines
- Push and turn; both halves seal when apart
- Viton Extreme ETP seals: E85, methanol, brake fluid
- Black anodized 6061-T6 aluminum
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$59.38
per EACH (USD)Brake Dry Break, -4 AN JIC Male, Aluminum, ETP Seals
Miniaturized dry break for brake and clutch lines: -4 AN JIC male (7/16"-20) both ends, black anodized aluminum, ETP-600S (Viton Extreme) seals. Both halves seal shut when disconnected.
Current production may vary slightly from the photo.
The Racetronix QDS-B0304AE is a matched-set dry break (male and female halves) coupling for -4 AN lines. Push the two halves together and turn to lock: the valves inside open for full flow. Turn and pull apart and both halves close before they separate, so the line stays full and almost nothing spills. Its compact body suits brake and clutch lines, for example to remove a caliper, master cylinder or a whole corner without bleeding the system again.
Key features
- -4 AN JIC male (7/16"-20, 37-degree flare) on both ends: fits any -4 AN female hose end or swivel.
- Sold as a matched set: male and female halves.
- Dry break: both halves close before they part, so the system stays full and clean.
- Push and turn to connect; turn and pull to disconnect. No tools.
- ETP-600S (Viton Extreme) seals: All automotive fluids: gasoline, race fuel, E85, methanol and fuel additives, engine and transmission oil, coolant, brake fluid, power steering fluid, grease, air and nitrogen, and solvents such as acetone.
- Black anodized 6061-T6 aluminum.
Connecting and disconnecting
- Connect: line up the two halves, push them together and turn the locking collar until it stops.
- Disconnect: turn the collar back and pull the halves apart. Both valves close as they separate.
- Keep the mating faces clean. Wipe them before connecting.
- Tighten the AN connections on each end with an AN wrench; do not use the coupling body as a handle.
Expect a few drops on disconnecting: the space between the two closed valves is very small, but it is not zero.
Seals and fluids
| Seal | Use with | Parts |
|---|---|---|
| ETP-600S (Viton Extreme) | All automotive fluids: gasoline, race fuel, E85, methanol and fuel additives, engine and transmission oil, coolant, brake fluid, power steering fluid, grease, air and nitrogen, and solvents such as acetone | QDS-0504AE, QDS-0504TE, QDS-0506AE, QDS-0506TE, QDS-0808AE, QDS-0808TE, QDS-1210AE, QDS-1210TE, QDS-B0303AE, QDS-B0303TE, QDS-B0304AE, QDS-B0304TE, QDS-M0303AE, QDS-M0303TE, QDSP-0806E, QDSP-0808E, QDSP-1210E, QDSP-1212E |
| Fluorocarbon (FKM / Viton) | Gasoline, oil, grease, air and nitrogen. Not for brake fluid | QDS-1210T |
| EPDM | Brake fluid only. Not for oil, mineral grease or gasoline | QDS-M0303T |
Choose the seal for the fluid in the line. If in doubt, the ETP versions (part numbers ending in E) cover the widest range of fluids.
Specifications
| Part number | QDS-B0304AE |
| Series | Brake: Miniaturized dry break for brake and clutch lines |
| Ends | -4 AN JIC male, 7/16"-20, 37-degree flare, both ends |
| Material | Black anodized 6061-T6 aluminum |
| Seals | ETP-600S (Viton Extreme) |
| Fluids | All automotive fluids: gasoline, race fuel, E85, methanol and fuel additives, engine and transmission oil, coolant, brake fluid, power steering fluid, grease, air and nitrogen, and solvents such as acetone |
| Operation | Bayonet: push and turn to connect; both halves seal when disconnected |
| Supplied as | Matched set, male and female halves |
Dry break chart: the full range
Every Racetronix dry break. Click a column heading to sort.
| Part | Series | AN size | Ends | Seals |
|---|---|---|---|---|
| QDS-B0303AE | Brake | -3 | Aluminum | ETP-600S (Viton Extreme) |
| QDS-B0303TE | Brake | -3 | Titanium | ETP-600S (Viton Extreme) |
| QDS-M0303AE | Motorcycle | -3 | Aluminum | ETP-600S (Viton Extreme) |
| QDS-M0303T | Motorcycle | -3 | Titanium | EPDM (end of line) |
| QDS-M0303TE | Motorcycle | -3 | Titanium | ETP-600S (Viton Extreme) |
| QDS-B0304AE | Brake | -4 | Aluminum | ETP-600S (Viton Extreme) |
| QDS-B0304TE | Brake | -4 | Titanium | ETP-600S (Viton Extreme) |
| QDS-0504AE | Standard | -4 | Aluminum | ETP-600S (Viton Extreme) |
| QDS-0504TE | Standard | -4 | Titanium | ETP-600S (Viton Extreme) |
| QDSP-0806E | Shrouded | -6 | Aluminum | ETP-600S (Viton Extreme) |
| QDS-0506AE | Standard | -6 | Aluminum | ETP-600S (Viton Extreme) |
| QDS-0506TE | Standard | -6 | Titanium | ETP-600S (Viton Extreme) |
| QDSP-0808 | Shrouded | -8 | Aluminum | Earlier-generation seals (end of line) |
| QDSP-0808E | Shrouded | -8 | Aluminum | ETP-600S (Viton Extreme) |
| QDS-0808AE | Standard | -8 | Aluminum | ETP-600S (Viton Extreme) |
| QDS-0808TE | Standard | -8 | Titanium | ETP-600S (Viton Extreme) |
| QDSP-1210 | Shrouded | -10 | Aluminum | Earlier-generation seals (end of line) |
| QDSP-1210E | Shrouded | -10 | Aluminum | ETP-600S (Viton Extreme) |
| QDS-1210AE | Standard | -10 | Aluminum | ETP-600S (Viton Extreme) |
| QDS-1210T | Standard | -10 | Titanium | Fluorocarbon (FKM / Viton) (end of line) |
| QDS-1210TE | Standard | -10 | Titanium | ETP-600S (Viton Extreme) |
| QDSP-1212E | Shrouded | -12 | Aluminum | ETP-600S (Viton Extreme) |
Frequently asked questions
Do I need to bleed the system after disconnecting?
Normally not. Both halves close before they separate, so very little fluid escapes and almost no air gets in. On brake systems, check the pedal after reconnecting and bleed if it feels soft.
Why Viton Extreme ETP-600S seals?
Standard Viton (FKM) handles fuel and oil but is attacked by brake fluid; EPDM handles brake fluid but not fuel or oil. ETP-600S is a premium, specialist fluoroelastomer that resists almost every fluid and solvent a car uses: all fuels including race fuel, E85 and methanol with their additives, engine and transmission oils, brake fluid, coolant and power steering fluid, and even aggressive solvents such as acetone. One dry break works on any line in the car.
Can I use this on brake lines?
Yes. The ETP seals are compatible with brake fluid, as well as every other automotive fluid.
What do the letters in the part number mean?
A = aluminum ends, T = titanium ends, E = ETP seals. B = brake series, M = motorcycle (miniature), P = shrouded. The digits give the body size and the AN size of the ends.
Questions and support
Questions before you order? Email [email protected].
Racetronix provides technical support to verified customers through our support forum, not by phone or email. Please request forum access when you place your order so your account is approved before your parts arrive. The forum is moderated, open 24/7, and holds a knowledge base going back to 1999.
