UNC · UNF · NPT · Jamnagar, India
Inch-series brass hardware to ASME B18.2.2, B18.6.3 and B18.3, plus catalog-standard standoffs, inserts and SAE J512 flare nuts — all machined to order in C36000 brass.
Home / Products / Standard Parts / Imperial & ANSI
Imperial (inch-series) brass parts use Unified threads — UNC coarse and UNF fine per ASME B1.1 — and ANSI/ASME dimensional standards such as B18.2.2 for hex nuts, B18.6.3 for machine screw nuts and B18.3 for socket set screws. Brassland machines the full range from C36000 free-machining brass (commonly cross-referenced to EN CW614N), with EN 10204 3.1 certificates per shipment, on a fleet of 79+ CNC machines including 28+ Swiss-type lathes.
Finished hex and jam nuts, 1/4–3/4 in., full verified tables.
View →ASME B18.6.3Small hex nuts #0–3/8 — the standard below 1/4 in.
View →Catalog standard2-56 to 1/4-20 — US catalog hex pairings and lengths.
View →ASME B18.3Cup, flat, cone and half-dog points, #4–1/2 in.
View →Per drawingHeat-set and press-in inserts, 2-56 to 3/8-16.
View →SAE J512Verified 45° and inverted-flare thread charts.
View →| Size | TPI | Basic major dia (in.) | Basic pitch dia (in.) | Tap drill | Drill dia (in.) |
|---|---|---|---|---|---|
| #4-40 | 40 | 0.1120 | 0.0958 | #43 | 0.0890 |
| #6-32 | 32 | 0.1380 | 0.1177 | #36 | 0.1065 |
| #8-32 | 32 | 0.1640 | 0.1437 | #29 | 0.1360 |
| #10-24 | 24 | 0.1900 | 0.1629 | #25 | 0.1495 |
| 1/4-20 | 20 | 0.2500 | 0.2175 | #7 | 0.2010 |
| 5/16-18 | 18 | 0.3125 | 0.2764 | F | 0.2570 |
| 3/8-16 | 16 | 0.3750 | 0.3344 | 5/16 | 0.3125 |
| 1/2-13 | 13 | 0.5000 | 0.4500 | 27/64 | 0.4219 |
Basic (nominal) profile per ASME B1.1; tap drills are the customary ≈75% thread-engagement drills. Interactive versions: thread size chart · tap drill chart.
| NPT size | Pipe OD (in.) | TPI |
|---|---|---|
| 1/16 | 0.3125 | 27 |
| 1/8 | 0.405 | 27 |
| 1/4 | 0.540 | 18 |
| 3/8 | 0.675 | 18 |
| 1/2 | 0.840 | 14 |
| 3/4 | 1.050 | 14 |
| 1 | 1.315 | 11.5 |
| 1-1/4 | 1.660 | 11.5 |
| 1-1/2 | 1.900 | 11.5 |
| 2 | 2.375 | 11.5 |
NPT threads per ASME B1.20.1: taper 1:16 on diameter (3/4 in./ft), 60° thread angle. Brass NPT plugs, fittings and ported components are machined to your drawing with full B1.20.1 gauging data applied at machining.
The US free-machining standard — full datasheet.
View →MaterialCommonly cross-referenced to C36000.
View →MaterialSilicon brass for potable / RoHS work.
View →US-market drawings call out inch fasteners by ANSI/ASME standard — and those standards do not always mirror the metric ones. Hex nuts below 1/4 in. move from ASME B18.2.2 to B18.6.3 with different thicknesses; hex standoffs have no ASME standard at all and follow catalog convention; insert geometry is proprietary per manufacturer. Each page above states which of these applies, publishes only independently verified dimensions, and marks everything else “per drawing” — so what you see is what gets machined. Metric counterparts are cross-linked on every page (for example UNC hex nuts ↔ DIN 934).
Give the standard, thread, finish and quantity. We machine inch-series brass parts in Jamnagar, India, and export to 40+ countries.
Both are Unified inch threads per ASME B1.1; UNC is the coarse series and UNF the fine series. A 1/4 in. screw is 1/4-20 in UNC and 1/4-28 in UNF — same basic major diameter, different pitch. For nuts, the body dimensions are identical; only the internal thread changes.
No. They are commonly cross-referenced as the standard free-machining brasses of the US and Europe, and both are rated at 100% machinability, but their compositions differ: C36000 has 60–63 % copper and 2.5–3.0 % lead, CW614N (CuZn39Pb3) 57–59 % copper and 2.2–3.5 % lead. The EN grade that matches C36000 is CW603N; the closest UNS equivalent of CW614N is C38500, whose copper range contains that of CW614N but whose lead starts at 2.5 % instead of 2.2 %. Datasheets for all four are on this site.
Yes — NPT per ASME B1.20.1 (1:16 taper, 60 degree thread angle), from 1/16 to 2 in. nominal, on plugs, fittings and ported components machined to your drawing.
Hex standoffs and threaded inserts for plastics. Both follow manufacturer catalog conventions rather than an ASME table, so our pages publish verified catalog ranges and mark the rest per drawing — the drawing is always the controlling document.
Usually, yes. Send the part number or drawing; we machine to the referenced dimensions in C36000 brass and confirm everything on the drawing supplied with the quotation, with EN 10204 3.1 certification per shipment.