Product Overview
Size M 5.5mm OD x 2.1mm ID Threaded Coaxial DC Power Connector
Condition
Unused new old stock (NOS). Nickel-plated solder lugs and threaded exterior are clean and corrosion-free. Includes knurled panel-mounting hardware.
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Product Overview
RadioShack catalog number 274-1563 is a panel-mount coaxial DC power jack designed for chassis installation in low-voltage electronics. Classified as Size M in the RadioShack connector system, it features a standard 5.5mm outer diameter barrel socket with a 2.1mm center pin. The metal threaded body mounts securely through equipment enclosures using the included knurled retaining ring, while two rear solder terminals provide dependable wiring attachment.
Key Features
- Size M coaxial DC power receptacle
- Tip size: 5.5 mm outer diameter by 2.1 mm inner diameter
- Requires a 7/16-inch panel mounting hole
- Threaded metal body with knurled mounting nut
- Nickel-plated solder lug terminals
- Two-conductor chassis-mount configuration
Applications
- Installing low-voltage DC power inputs on DIY project enclosures and audio gear
- Replacing damaged 5.5mm x 2.1mm barrel jacks on guitar effect pedals and synthesizers
- Restoring vintage RadioShack electronic accessories and custom bench power supplies
Frequently Asked Questions
What size mounting hole is required for panel installation?
This jack installs into a 7/16-inch diameter chassis hole and tightens into place using the supplied knurled nut.
What mating plug dimensions does this jack accept?
It mates with standard 5.5mm O.D. by 2.1mm I.D. coaxial barrel power plugs.
Can this jack be used with a 2.5mm inner diameter plug?
No. A 2.5mm inner diameter plug will fit loosely over the 2.1mm center pin, causing intermittent contact or loss of power. This connector is matched specifically to 2.1mm center pins.
The classic RadioShack Size M was the backbone of countless bench supplies, pedalboards, and custom enclosures. Thread it into your chassis, solder your leads, and bring your build under power.
