Milton S-505 Analog Tire Inflator — 15" Hose, Single-Head Swivel Chuck, 10–60 PSI, Heavy-Duty Metal Body

The Milton S-505 is a heavy-duty analog tire inflator with a 15" hose and single-head swivel chuck that delivers dependable, field-serviceable tire pressure readings from 10–60 PSI.

Built by Milton in the USA, the S-505 combines a rugged metal body, magnified window scale, and replaceable internal cartridges so you can keep this inflator in service for years. Its single-head design and full-swivel chuck make it especially useful for motorcycles and other valves tucked into tight spaces, while the 15" hose gives comfortable reach for trunks, garages, and busy shops.

How accurate is the Milton S-505 for everyday tire inflation?

The S-505 is performance-tested and factory calibrated to provide reliable PSI readings from 10 to 60 in 2-psi increments. For users who need metric readings, kilopascal (kPa) scales are available via special order.

• Range: 10–60 PSI with 2-psi increments
• Optional kPa scale: 80–840 kPa, 20 kPa increments (special order)
• Magnifying window lens improves visibility of the dial
• Calibrated during manufacture for consistent results

Will the S-505 reach hard-to-access tire valves like those on motorcycles?

Yes — the single head air chuck paired with a 15" flexible hose and full-swivel chuck is designed for valves in tight or awkward positions. The single-head format is deliberately chosen to better fit small valve stems and recessed valve locations.

• 15-inch hose for extended reach and maneuverability
• Single head chuck tailored for motorcycles and tight valves
• Full-swivel chuck for easier alignment and reduced hose stress
• Compact, heavy-duty construction suited to rough use

Can parts be replaced if the gauge or chuck wear out?

Milton designed the S-505 so key service parts can be replaced rather than replacing the whole unit. Replacement cartridges and chucks extend the tool’s working life and make maintenance straightforward.

• Replaceable gauge and valve cartridges (Milton #507 and #512 for 500 series)
• Replacement hose whip available (Milton #508)
• Replacement chuck available (Milton #P500-44) with 7/16"-27 UNS threads
• 1/4" NPT air inlet and 3/8-24 thread compatibility for fittings

Who is this for? The Milton S-505 is aimed at motorists, motorcycle owners, small-fleet operators, and DIY mechanics who want a durable, serviceable analog inflator for everyday maintenance. It’s also a practical choice for garages and tire shops needing a single-head inflator for hard-to-reach valves. If you work with very large truck or dually tires, consider Milton’s dual-head large-bore gauges instead.