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Manufacturing services
CNC milling and turning · From 1 part
Terminal blocks, connectors, bus bars, bushings and hardware in C260 brass, machined from your file. Upload your CAD and order online, starting at a single part.
Terminal block
C260 Brass · 50 × 16 × 14 mm · 3 × Ø6 wire holes · 3 × M4 tapped holes · 2 mounting holes · CNC milled
1 pc
$79.03 USD
per part
25 pcs
$17.73 USD
per part
-77.57%100 pcs
$15.41 USD
per part
-80.50%C260 brass (UNS C26000, ASTM B36), also called cartridge brass or 70/30 brass, is a copper alloy with about 30% zinc. It conducts electricity and heat well, resists corrosion in air and fresh water, and has a golden color that polishes very well. That is why it is used for terminal blocks, electrical connectors, hardware and decorative parts. At PREMSA we CNC mill and turn it from your file, starting at a single part with an instant price.
C260 brass properties: mechanical, physical and electrical data to choose the material for your machined part.
Alloy Type
70/30 cartridge brass (copper-zinc alloy)
Primary Characteristics
Very ductile, conducts electricity and heat well, corrosion resistant, golden color that polishes well
Tensile Strength (Ultimate)
45–75 ksi (310–515 MPa) depending on temper
Tensile Strength (Yield)
15–55 ksi (100–380 MPa)
Elongation at Break
30–70% (depending on temper)
Hardness
Rockwell B 35–80 (varies by temper)
Density
8.5 g/cm³ (0.307 lb/in³)
Elastic Modulus
15,000 ksi (103 GPa)
Poisson’s Ratio
0.34
Electrical Conductivity
≈ 28% IACS
Thermal Conductivity
≈ 120 W/m·K
Melting Range
915–955 °C (1680–1750 °F)
Formability
Excellent: it bends, stamps and deep draws cold
Machinability
Medium: it cuts cleanly with sharp positive-rake tooling, good chip evacuation and coolant
Weldability
Joins well by brazing and soldering
Corrosion Resistance
Good (resistant to atmospheric and freshwater environments)
Common Forms
Plate, sheet, flat bar, bar and tube
Typical Applications
Terminal blocks, electrical connectors, bus bars, bushings, hardware, decorative parts
Material Composition
Copper (Cu): 68.5–71.5%, Zinc (Zn): balance (~28.5–31.5%)
ASTM Standard
ASTM B36 (plate, sheet, strip and rolled bar); B135 (tube)
Rating across key engineering and manufacturing criteria.
Strength
Weight
Machinability
Formability
Fatigue Resistance
Corrosion Resistance
Electrical Conductivity
Cost Efficiency
Upload your CAD file and get an instant price and delivery date. CNC milling and turning from one part to production.
We CNC mill and turn C260 brass parts that carry current, resist moisture or have to look good.
Terminal blocks
Electrical connectors and terminals
Bus bars
Bushings and spacers
Plates and brackets
Hardware and decorative parts
Name plates
Instrument parts
Custom C260 parts
What people ask most about C260 brass parts: what it is, why it is called cartridge brass, composition, uses, machining, conductivity, magnetism, tarnish, soldering, equivalents, price and tolerances.
C260 brass is chosen for parts that carry current, resist moisture or have to look good: terminal blocks, connectors, hardware and decorative parts.
At PREMSA Industries we machine C260 with CNC milling and turning from your file, from a prototype to production.
C260 is chosen when the part has to conduct, resist moisture and look good.
If your drawing doesn’t specify tolerances, we machine to ISO 2768-m (medium). On dimensions you call out —holes, threads, fits and contact surfaces— we can hold ±0.025 mm (±0.001 in), and critical dimensions are checked in inspection.
C260 is machined with CNC milling, CNC turning, drilling and tapping. It is ductile and makes long chips, so it is run with sharp tooling and good chip evacuation.
Because it conducts, resists moisture and looks good, C260 is used in many parts made with CNC machining.
C260 is usually the right choice when the part has to carry current, resist moisture or look good.