Dorman 12701 — Quick Bleeder — 3/8-24
3/8-24, 1-3/16 in (1.188 in); 2 quick bleeders. Steel bleeder screw with an internal check valve. Compare thread pitch and seat with the existing caliper or wheel cylinder.
Check item details and conditionDorman Brake Bleeder Screws: Quick Bleeders, Threads & Lengths
Brake bleeder screws look alike, but thread diameter, pitch, overall length, tip geometry and whether a check valve is built in can differ. Dorman offers quick-bleeding screws and conventional bleeders in several imperial and metric sizes. Match the exact original part number or Dorman-approved vehicle application before selecting a replacement for a caliper or wheel cylinder.
Quick Bleeders versus conventional bleed screws
Quick Bleeder: built-in check valveDorman 12701 and 12702 include an internal check valve. This differs from a conventional vent screw and requires the corresponding manufacturer service procedure.
Standard bleeder: no check valve13901, 13902 and 13908 are standard two-piece packages. They have different threads and lengths; do not select by external appearance.
Assortment: several separate thread types13949 contains ten conventional bleeders across five sizes, two of each. The assortment does not mean the same screw fits all of the listed applications.
Dorman brake bleeder thread pitch, length and quantity chart
Specifications are based on the identified Dorman MPNs. Thread notation shows the manufacturer-listed nominal thread, while overall length is the full screw length rather than the exposed section after installation.
| Dorman MPN | Thread | Overall length | Internal check valve | Package |
|---|---|---|---|---|
| 12701 | 3/8-24 | 1-3/16 in (1.188 in) | Yes | 2 quick bleeders |
| 12702 | M10 × 1.5 | 33 mm | Yes | 2 quick bleeders |
| 13901 | 3/8-24 | 1-1/4 in | No | 2 standard screws |
| 13902 | M8 × 1.25 | 24 mm | No | 2 standard screws |
| 13908 | M10 × 1.5 | 30 mm | No | 2 standard screws |
| 13949 | 1/4-28; 5/16-24; 3/8-24; M10 × 1.0; M10 × 1.5 | Size-specific; see contents | No | 10 screws; 2 of each size |
Same thread does not establish direct interchangeability: Dorman 12701 and 13901 are both 3/8-24, but their listed lengths differ (1-3/16 versus 1-1/4 inch) and only 12701 has a check valve. Similarly, 12702 and 13908 both use M10 × 1.5, but are 33 and 30 mm long, respectively. The correct screw must also seal properly against the original brake component.
What is actually in Dorman 13949?
The assortment contains 10 standard bleeder screws: two each of 1/4-28 × 15/16 inch, 5/16-24 × 1 inch, 3/8-24 × 1-1/4 inch, M10 × 1.0 × 35 mm and M10 × 1.5 × 30 mm. Dorman lists no built-in check valve for this kit. This is useful for servicing several systems only when the correct replacement has been independently identified for each brake.
How to avoid an incorrect brake bleeder replacement
- Identify the exact caliper or wheel cylinder: Use the manufacturer's current vehicle fitment and original hardware number. A general model-year or brand match is not sufficient.
- Verify thread size and pitch: Distinguish 3/8-24, M8 × 1.25, M10 × 1.0 and M10 × 1.5. Mixing metric pitch sizes can damage a threaded brake component.
- Compare overall length and tapered seat: An apparently similar screw may have a different tip or protrusion. A correct thread does not ensure a fluid-tight hydraulic seal.
- Confirm the bleeder type: Check-valve products and ordinary bleed screws have different mechanisms; use only parts approved for the vehicle and the appropriate bleeding procedure.
- Use professional brake service: Hydraulic brake systems are safety-critical. A qualified technician should confirm the part, tighten it to the vehicle maker's specification, bleed the circuit correctly and verify there are no leaks before use.
Frequently asked questions
Does Dorman 12701 contain two screws? Yes. Dorman specifies two quick bleeders with check valves per package.
Are 12702 and 13908 the same part? No. Both are M10 × 1.5, but 12702 is a 33-mm quick bleeder with a check valve, whereas 13908 is a 30-mm conventional bleeder.
Is 13949 a universal brake bleeder kit? No. It is an assortment of five specific nominal thread-and-length combinations. Each individual vehicle still requires fitment confirmation.
Compare exact Dorman bleeder products
Each card links to the corresponding UsedRVParts listing. Check current availability, item condition and packaging before ordering; catalog photos identify the manufacturer item rather than documenting the exact condition of an individual product.
Quick Bleeders with check valves
Two Dorman HELP! screw sets, each with a built-in one-way check valve.
Dorman 12702 — Quick Bleeder — M10 × 1.5
M10 × 1.5, 33 mm; 2 quick bleeders. Metric 10 mm check-valve bleeder. Do not confuse 1.5 mm thread pitch with M10 × 1.0 components.
Check item details and conditionConventional bleeder screw pairs
Standard steel screws without check valves, in three distinct thread sizes and lengths.
Dorman 13901 — Standard bleeder — 3/8-24
3/8-24, 1-1/4 in; 2 standard screws. Standard bleeder with the same nominal thread as 12701 but a different listed overall length. Confirm seat and original fitment.
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Dorman 13902 — Standard bleeder — M8 × 1.25
M8 × 1.25, 24 mm; 2 standard screws. A smaller metric screw for an exact M8 × 1.25 application. It does not substitute for the M10 bleeder family.
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Dorman 13908 — Standard bleeder — M10 × 1.5
M10 × 1.5, 30 mm; 2 standard screws. Non-check-valve option with the same nominal thread as 12702, but 3 mm shorter overall. Verify original installation.
Check item details and conditionMultiple-size conventional bleeder assortment
One kit covering several sizes; not a substitute for matching each original application.
Dorman 13949 — Multi-size standard bleeder assortment
1/4-28; 5/16-24; 3/8-24; M10 × 1.0; M10 × 1.5, Size-specific; see contents; 10 screws; 2 of each size. Kit includes two each: 1/4-28 × 15/16 in; 5/16-24 × 1 in; 3/8-24 × 1-1/4 in; M10 × 1.0 × 35 mm; M10 × 1.5 × 30 mm.
Check item details and conditionManufacturer identification references
Check the latest Dorman information for the exact MPN and its approved applications: 12701 Quick Bleeder, 12702 Quick Bleeder, 13902 standard bleeder, and 13949 assortment.
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