Milton S-506 Dual Head Tire Inflator Gauge
- 10 to 160 PSI, read in 2 lb increments
- 15 inch hose to a dual head chuck
- 1/4 inch NPT air inlet for a compressor coupler
- Replaceable gauge and valve cartridges
- Magnifying lens for full view of the scale
- 1 year warranty from Milton
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A long running Milton design for topping up tires from a compressor, with parts that can be serviced. Its dual head chuck cannot begin filling a tire that has no air in it.
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ASIN: B0002SRL20Model: S-506Category: Tire Gauges
Overview
A driver with a home compressor gets a gauge and inflator in one tool, filling through a dual head chuck and reading pressure through a magnifying lens. Milton's original design runs the hose from a trigger to the chuck, and the trigger controls the air flow into the tire.
Serviceable gauge and valve cartridges let a worn part be swapped instead of the whole tool. The listing does not mention lock-on threads, so plan on holding the chuck to the valve while filling.
Who it's for
Home mechanics who already own a compressor and want to fill and read pressure in one squeeze will get the most use from it. Owners of a flat tire with no air left, or anyone who only wants a pocket checker, need another tool.
Pros and cons
- Gauge cartridge can be replaced
- Valve cartridge can be replaced
- Magnifying lens for reading the scale
- Fine steps across a wide range
- Cannot fill a tire with zero pressure
- Off-side head may leak until reseated
- Lock-on threads not listed
- Metric scale only by special order
Performance notes
Air passes from the compressor through the inlet and hose to the chuck, where a self-sealing valve inside the dual head closes the unused side using tire pressure. With no pressure in the tire that valve has nothing to push it, so air escapes. Reading accuracy rests on the replaceable gauge cartridge.
Specifications
| Brand | Milton |
|---|---|
| Model | S-506 |
| Dimensions & fit | |
| Item weight | 0.1 pounds |
| Item dimensions | 4.3 × 14.6 × 0.9 inches |
| Hose length | 15 inches |
| Capacity & performance | |
| Pressure range | 10 psi |
| Construction & materials | |
| Material Type | Alloy Steel |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Scale increments | 2 lb |
| Chuck type | Dual head |
| Thread Style | NPT |
| Air inlet | 1/4 inch NPT |
| DUAL HEAD CHUCK | Makes tire valves more accessible with the two heads for easier access |
| MILTON | This is the first original gauge of this type ever built! |
| REPLACEABLE PARTS | Gauge and valve cartridges can both be replaced |
Frequently asked questions
Why does air leak from the other side of the Milton S-506 chuck?
Release the trigger and remove the chuck. Point the straight side up, squeeze the trigger so the sealing valve drops, then place the chuck on the Schrader valve while air is still flowing.
Can the Milton S-506 fill a completely flat tire?
No. The self-sealing valve needs tire pressure to close the unused side, and a tire at 0 pressure has none.
What can the Milton S-506 inflate?
Milton lists cars, SUVs, trucks, bicycles, trailers, motor homes, wheelbarrows, golf carts, lawn tractors, motorcycles and ATVs.