Six free, instant tools for design engineers and buyers — bar weight, thread specs and tap drills across Metric/UNC/BSP/NPT, ISO 286 limits & fits, insert torque and alloy density. Built by a brass manufacturer, not a generic calculator site.
Dedicated page (linkable & printable): Metal Weight Calculator →
Estimate the weight of round, hex, square, octagon or rectangular bar, plate and hollow rod (tube) stock by alloy — brass, copper, aluminium or steel — in kg or lb. Useful for costing raw material, freight and per-piece yield.
Densities as on each datasheet (mid-range where a range is given); actual mass varies with exact composition and tolerance. Round: π·(d/2)²·L. Hex: (√3/2)·AF²·L. Square: side²·L. Octagon: 2(√2−1)·AF²·L. Rectangle: W·T·L. Hollow rod: π/4·(OD²−ID²)·L.
Reference: alloy densities as on each datasheet in the materials & alloys library (Copper Development Association, Kupferverband/DKI; the EN standards set no density value). Where a range is given, the calculator uses its middle. Steel: 7.85 g/cm³ for carbon steel (EN 1993-1-1), 7.9 and 8.0 g/cm³ for 1.4301 / 304 and 1.4401 / 316 stainless (EN 10088-1). Conversions: 1 in = 25.4 mm, 1 lb = 453.592 g.
Dedicated page (linkable & printable): Thread Size Chart →
Live thread dimensions across four systems — ISO metric coarse, UNC inch, BSP parallel (G, ISO 228) and NPT taper. Pick a series and size; the table below follows your selection.
| Thread | Pitch / TPI | Major Ø | Pitch Ø | Minor Ø (ext) | Tap drill | Clearance |
|---|
Coarse-pitch series per ISO 261. Basic diameters per ISO 724: d₂ = d − 0.6495·P, d₃ = d − 1.2269·P (external), D₁ = d − 1.0825·P (internal). Fine-pitch threads (e.g. M8×1) use different pitches — ask us for the full fine series.
References: ISO 261 / ISO 724 / ISO 965 / ISO 273 (metric), ASME B1.1 (UNC), ISO 228-1 (BSP parallel G), ASME B1.20.1 (NPT). See also our thread standards guide.
Dedicated page (linkable & printable): Tap Drill Chart →
Select a thread series and size for the recommended tap-drill (~75% engagement for metric/UNC). The table follows your selected series.
| Thread | Pitch / TPI | Tap drill (mm) | Tap drill (inch) | Clearance (close / normal) |
|---|
Metric/UNC tap-drill ≈ major Ø − pitch (≈75% engagement); use a slightly larger drill in free-machining brass to reduce tap load. BSP G drills are for parallel threads (ISO 228-1). NPT holes should be drilled then reamed with a 1:16 taper reamer before tapping for full thread form.
References: ISO 261 / ISO 724 / ISO 273 (metric), ASME B1.1 & Machinery's Handbook tapping data (UNC), ISO 228-1 (G), ASME B1.20.1 (NPT).
Dedicated page (linkable & printable): Limits & Fits →
For turned brass rod and CNC parts. Use the ISO 286 fits table to pick shaft/hole pairs for assemblies, the IT-grade table for the actual tolerance band at a given size, and ISO 2768 for untoleranced dimensions on the drawing.
Type a nominal size and a tolerance class — e.g. 8 + H6 — or a complete fit like H7/g6 to get limit sizes and the fit character. Computed per ISO 286-1:2010 / ISO 286-2:2010 (the current editions, confirmed June 2026).
Covers Ø0–500 mm, grades IT1–IT16, deviation letters D–P / d–p incl. H, h, JS, js (uppercase = hole, lowercase = shaft). Press-fit classes r, s and beyond — ask our engineers.
| Fit | Type | Character | Typical use on turned brass parts |
|---|---|---|---|
| H7/g6 | Clearance | Close running / sliding | Spindles, guided pins, rotating shafts needing fine fit |
| H7/h6 | Clearance | Location / slide | Slip-fit locating spigots, parts assembled by hand |
| H8/f7 | Clearance | Free running | Bushings, bearings with lubrication, looser running fits |
| H11/c11 | Clearance | Loose | Wide clearance, weldments, non-critical assemblies |
| H7/k6 | Transition | Light keying | Located parts needing accuracy but occasional disassembly |
| H7/n6 | Transition | Tight | Press-located parts, light-duty drive without slip |
| H7/p6 | Interference | Press / drive | Inserts, bushes & pins retained by interference |
| H7/s6 | Interference | Heavy drive | Permanent press fits, shrink/force assembly |
Tolerance band width for a given nominal size. A hole H7 = 0 to +IT7; a shaft h6 = 0 to −IT6. Apply the fundamental deviation for other letters.
| Nominal size (mm) | IT6 | IT7 | IT8 | IT9 | IT11 |
|---|---|---|---|---|---|
| over 3 to 6 | 8 | 12 | 18 | 30 | 75 |
| over 6 to 10 | 9 | 15 | 22 | 36 | 90 |
| over 10 to 18 | 11 | 18 | 27 | 43 | 110 |
| over 18 to 30 | 13 | 21 | 33 | 52 | 130 |
| over 30 to 50 | 16 | 25 | 39 | 62 | 160 |
| over 50 to 80 | 19 | 30 | 46 | 74 | 190 |
| over 80 to 120 | 22 | 35 | 54 | 87 | 220 |
Worked example: a Ø20 mm H7 bore = 20.000 / 20.021 mm (0 to +21 µm). A Ø20 mm g6 shaft = 19.993 / 19.980 mm (−7 to −20 µm), giving a close-running clearance fit.
Applies to dimensions without an individual tolerance. We work to class medium (m) by default; tighter classes available on request.
| Nominal length (mm) | Fine (f) | Medium (m) | Coarse (c) | Very coarse (v) |
|---|---|---|---|---|
| 0.5 to 3 | ±0.05 | ±0.1 | ±0.2 | — |
| over 3 to 6 | ±0.05 | ±0.1 | ±0.3 | ±0.5 |
| over 6 to 30 | ±0.1 | ±0.2 | ±0.5 | ±1.0 |
| over 30 to 120 | ±0.15 | ±0.3 | ±0.8 | ±1.5 |
| over 120 to 400 | ±0.2 | ±0.5 | ±1.2 | ±2.5 |
| over 400 to 1000 | ±0.3 | ±0.8 | ±2.0 | ±4.0 |
Typical turned-brass capability: we routinely hold IT7–IT8 on diameters and ISO 2768-m or finer on lengths; critical features can be held to IT6 / ±0.01 mm with in-process gauging. State the fit or tolerance on your drawing and we quote to it.
References: ISO 286-1:2010 & ISO 286-2:2010 (GPS — code system for tolerances on linear sizes; current editions), ISO 1829 (selection of tolerance zones), ISO 2768-1 (general tolerances — linear & angular), ISO 2768-2 (geometrical; withdrawn in 2021, replaced by ISO 22081). Values cross-checked against Machinery's Handbook. See our tolerances guide.
Dedicated page (linkable & printable): Insert Installation →
Typical guidance for heat-set and press-in brass inserts in thermoplastics. Values are a starting point — always confirm with pull-out and jack-out testing on your own host material.
| Thread | Typical insert OD (mm) | Boss hole Ø (mm) | Heat-set tip temp | Typical seating force |
|---|---|---|---|---|
| M2 | 3.2–3.6 | 3.0–3.2 | 200–260 °C | Light hand press |
| M2.5 | 3.6–4.0 | 3.4–3.6 | 200–260 °C | Light hand press |
| M3 | 4.0–4.6 | 3.8–4.2 | 220–280 °C | Light–medium |
| M4 | 5.6–6.0 | 5.4–5.6 | 220–280 °C | Medium |
| M5 | 6.4–7.1 | 6.2–6.5 | 240–300 °C | Medium |
| M6 | 8.0–8.5 | 7.8–8.0 | 240–300 °C | Firm |
| M8 | 9.5–10.5 | 9.3–9.6 | 260–320 °C | Firm (press) |
Boss hole sizes assume amorphous/semi-crystalline thermoplastics; glass-filled grades may need a larger hole. Heat-set tip temperature is set above the polymer melt point, not the insert. Brassland supplies inserts to DIN 16903, IUTB/IUTC/IUTD and customer-specific profiles.
References: DIN 16903 (threaded inserts for plastics) and published heat-set boss-design guidance. Always validate with pull-out / jack-out testing on your own host material. See our brass inserts range.
Dedicated page (linkable & printable): Alloy Density →
Nominal densities for 19 alloys of the Brassland materials library. Each links to its full datasheet.
| Alloy (EN / UNS) | Common name | Density (g/cm³) | Typical use |
|---|---|---|---|
| CW614N / CuZn39Pb3 | Free-machining brass (machining std.) | 8.46–8.47 | Precision turned components |
| CW617N / CuZn40Pb2 | Hot-working brass | 8.40–8.44 | Forged & machined fittings |
| CW602N / CuZn36Pb2As | DZR brass | 8.43–8.45 | Water fittings (dezincification-resistant) |
| CW607N / CuZn38Pb1 | Free-machining brass | 8.41–8.44 | Water-side components |
| CW608N / CuZn38Pb2 | Free-machining and hot-stamping brass | 8.44 | Forged and turned fittings |
| CW612N / CuZn39Pb2 | Machining/forging brass | 8.43–8.45 | Forged blanks, machined parts |
| CW625N / CuZn35Pb1.5AlAs | DZR brass (Pb 1.2–1.6%) | 8.44 | Water fittings (dezincification-resistant) |
| CW510L / CuZn42 | No-lead-added brass (Pb ≤0.2%) | 8.40 | Hot-forged and extruded parts |
| CuZn37 / CW508L | Deep-drawing brass | 8.44 | Cold-formed parts |
| CuZn40 / CW509L | Duplex brass | 8.39–8.41 | General engineering |
| CW724R / CuZn21Si3P | Lead-free silicon brass | 8.28–8.30 | Drinking-water, RoHS-critical |
| C36000 | Free-cutting brass (UNS) | 8.50 | High-speed turned parts |
| C37700 | Forging brass (UNS) | 8.44 | Hot-forged components |
| C35330 | DZR brass (UNS) | 8.45 | Water fittings (dezincification-resistant) |
| C27450 | Low-lead brass (UNS) | 8.44 | Plumbing & hardware |
| C46400 | Naval brass | 8.41 | Marine & corrosive duty |
| C69300 / CuZn21Si3P | Lead-free silicon brass (UNS) | 8.30 | Lead-free programmes |
| C11000 (ETP) | Electrolytic tough pitch copper | 8.91 | Electrical / EV terminals |
| C14500 | Tellurium copper | 8.94 | High-conductivity machined parts |
See the full materials & alloys library for chemistry, mechanical properties and standards equivalents.
References: the Copper Development Association database and the Kupferverband (DKI) data sheets, as on each alloy’s datasheet on this site. The EN and ASTM product standards set no density value.
Static, printable dimension tables for inch-series brass hardware — the chart pages behind our Imperial & ANSI parts range.
Last reviewed: September 2026. Calculator outputs are estimates; verify against the governing standard and your drawing for procurement-critical work.
Send a drawing or sample. We quote custom CNC and hot-forged brass parts — no MOQ surprises.
Request a Quote →Brassland manufactures brass turned parts and CNC machined components to your drawing in Jamnagar, India, including precision turned brass components on 28+ Swiss-type lathes, with an EN 10204 3.1 certificate on every shipment.