Description
Midland Industries MM-39903 is a brass push-on hose barb x male jic 37° flare adapter that mates 1/2″ hose ID push-on (SAE 100R6 style) hose to a 1/2″ male JIC 37° flare connection. Replaces AMC 07205-0808 and is used on auxiliary air, oil-return, fuel-return, coolant-overflow, and other low- to medium-pressure hose lines throughout heavy-duty Class 6–8 trucks and trailers.
Specifications
| Manufacturer | Midland Industries |
|---|---|
| Part Number | MM-39903 |
| Part Type | Brass Push-On Hose Barb x Male JIC 37° Flare Adapter |
| Thread | 1/2″ male JIC 37° flare |
| Tube/Hose Size | 1/2″ hose ID |
| Configuration | straight adapter |
| Material | Brass |
Cross References
This part replaces or is equivalent to the following part numbers:
- Anderson Metals (AMC): 07205-0808
- McMaster-Carr: 53485K74
- Also known as: 29PO11-88, 310-88, 737-88, 73788, JM-08-08, JM-8-8
Applications
Light- to medium-pressure pneumatic, vacuum, and low-pressure fluid-transfer hose assemblies — auxiliary air, oil drain, coolant overflow, fuel return, and DEF lines on heavy-duty trucks and equipment.
Representative platforms:
Universal fitment for any heavy-duty truck, trailer, or off-highway equipment using SAE 100R6 push-on style hose with matching ID. Common on Freightliner, Kenworth, Peterbilt, Mack, Volvo, International, and Western Star Class 8 platforms.
Verify your fitting size, thread type, and application pressure rating before ordering to confirm fitment.









