Industrial Brass Electrical Pin / Mechanical Coupler (Non-Gold Cosmetic Finish)
Hardware / Electrical Component (Banana Plug or Expansion Pin) · Simulated gold appearance (Brass/Bronze alloy with a high copper-zinc content).
Purity: Non-precious; appears to be industrial brass or gold-colored plating on base metal (0% gold content).
Type
Hardware / Electrical Component (Banana Plug or Expansion Pin)
Purity
Non-precious; appears to be industrial brass or gold-colored plating on base metal (0% gold content).
Gold Type
Simulated gold appearance (Brass/Bronze alloy with a high copper-zinc content).
Weight
5 to 10 grams depending on whether the core is solid brass or hollowed for wiring.
Description
An industrial-grade mechanical pin, frequently used as a banana plug for audio speakers or a tensioning peg for electrical grounding. The item features a flat base with a set-screw and a split-shaft designed to compress upon insertion into a socket for a tight frictional fit. The color mimics gold to prevent corrosion and improve conductivity in higher-grade variants, though this specific piece appears to be standard brass.
Key Features
Slotted expansion tip, side-entry set screw, machined cylindrical body, and high-friction surface texture.
Color & Finish
Dull, brassy yellow with a machined cylindrical finish and visible lateral tool marks. Significant surface oxidation and patina.
Hallmarks & Stamps
None visible. Industrial components typically lack precious metal hallmarks; there may be a manufacturer part number on the flat face not shown.
Dimensions Estimate
Approximately 20mm to 30mm in length with a 4mm to 6mm diameter; standard technical hardware scale.
Gemstones & Inlays
None; this is a functional industrial fastening or conducting component.
Clasp & Closure
Mechanical slotted expansion tip (tension fit) and a flat-head set screw for secure wire attachment.
Chain & Links
N/A; item is a solid machined peg with a split tension shaft.
Craftsmanship Details
Lathe-turned machining with a cut-out slot and a tapped hole for the set screw. Basic industrial precision.
Authentication Indicators
Red flags for gold: The presence of a steel/brass set screw, machined tool marks inconsistent with jewelry, and the characteristic oily-yellow hue of industrial brass rather than the rich luster of karat gold.
Origin & Maker
Likely a generic hardware manufacturer for audio, electronics, or aerospace applications.
Era & Period
Modern Industrial/Contemporary Technical (mid-20th century to present).
Age Estimate
Unknown; likely 1-20 years old based on the screw style and level of oxidation.
Cultural Significance
Represents the utilitarian use of gold-colored alloys in modern infrastructure and electronics.
Condition Notes
Fair to Good. Shows significant surface scratching, minor oxidation (tarnishing), and wear on the screw head consistent with tool use.
Value Estimate
Minimal; less than $1.00 USD. Value is purely functional rather than intrinsic or collectible.
Care & Maintenance
Clean with a mild abrasive or brass polish to remove oxidation. Avoid moisture if used for electrical purposes.
Similar Items
24K Gold-Plated Audio Banana Plugs, Brass Dowel Pins, Expansion Bolts.
Interesting Facts
Brass is often used as a 'placeholder' for gold in industrial settings because its thermal and electrical conductivity is sufficient for many tasks at a fraction of the cost.