Alloy Grade UNS No. IS Standard Key Properties Applications
Free Cutting Brass C36000 IS 319 Excellent Machinability, Good Strength Precision Turned Parts, Fasteners, Gears
Forging Brass C37700 IS 6912 Exceptional Hot Forgeability Valves, Fittings, Builder Hardware
High Tensile Brass C86300 IS 320 High Strength, Wear Resistance Marine Hardware, Heavy Duty Bushings
Lead-Free Brass C68000 / DZR RoHS Compliant Eco-friendly, Dezincification Resistant Potable Water Components, Medical Parts

Alloy Type UNS No. BS Standard Key Properties Applications
Phosphor Bronze C54400 PB102 High Wear Resistance, Fatigue Strength Electrical Contacts, Bearings, Springs
Aluminum Bronze C61400 CA104 High Strength, Extreme Corrosion Resist Marine Hardware, Pumps, Heavy Equipment
Gunmetal C83600 LG2 Pressure Tightness, Good Machinability Pump Impellers, Valve Bodies, Castings
Silicon Bronze C65500 CS101 High Corrosion Resistance, Weldable Fasteners, Architectural Fittings

Thread Type Standard Ref Flank Angle Pitch / TPI Range Primary Application
ISO Metric ISO 68-1 60° 0.35 mm - 6.0 mm General Purpose, Automotive Fasteners
BSP / BSPT ISO 7 / EN 10226 55° 28 - 11 TPI Pipe Fittings, Pneumatic/Fluid Sealing
NPT / NPTF ANSI B1.20.1 60° 27 - 11.5 TPI Pressure Tight Pipe Joints (USA Standard)
UNC / UNF ANSI B1.1 60° 80 - 12 TPI American Standard Fasteners & Hardware

Fit Type Description Hole Tolerance Shaft Tolerance Example Application
Clearance Fit Loose or free-running fit with guaranteed gap H7 / H8 f7 / e8 Bearings, Pulleys, Sliding Assemblies
Transition Fit Snug or push fit; exact location with slight interference H7 k6 / j6 Precision Locating Pins, Spigots
Interference Fit Press or shrink fit requiring force to assemble H7 p6 / s6 Gears on Shafts, Permanent Bushings

Finish Type Process Specification Thickness Range Primary Benefit
Natural Brass Acid Dipped / Passivated N/A Clean surface, Natural golden aesthetic
Nickel Plating Bright / Dull Nickel 5 - 15 µm Excellent Corrosion Resistance & Hardness
Tin Plating Matte / Bright Tin 3 - 10 µm Superior Solderability & Food Grade Safety
Silver Plating Hard Silver 2 - 8 µm High Electrical Conductivity & Anti-galling
Chrome Plating Hexavalent / Trivalent 10 - 25 µm Extreme Wear & Scratch Resistance

Packaging Layer Material Used Function / Benefit
Primary (Inner) VCI Bags / LDPE Plastic Wrap Prevents tarnishing, oxidation and moisture ingress
Secondary Corrugated Partitions / Bubble Wrap Prevents part-to-part scratches and collision during transit
Tertiary 7-Ply Heavy Duty Carton Boxes Provides structural rigidity and burst protection
Outer / Pallet Fumigated Wooden Pallet (ISPM 15) Enables safe forklift handling and sea container stuffing
Securing Stretch Wrap & PP Strapping Weatherproofs and tightly secures the entire pallet load

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