Male-Female, Female-Female, and Male-Male hex standoffs in CW614N brass. ISO metric (M2.5–M8) and American inch UNC/UNF (#4-40–¼-20) threads — class 6H/6g or 2A/2B. Lengths 5 mm to 50 mm and inch equivalents. All made to order — custom lengths, threads, and hex sizes on request.
All types machined from CW614N (CuZn39Pb3) free-machining brass bar. Custom configurations on request.
All three standoff types available in ISO metric (M2.5–M8) and American inch UNC/UNF (#4-40–¼-20). Metric dimensions are shown below, followed by the inch series; inch sizes are cut to ASME B1.1 with hex and length matched to your assembly. Custom lengths, threads, and hex sizes machined to order. Thread class: metric 6g / 6H, inch 2A / 2B · Tolerance ±0.1 mm on L.
A/F = Across Flats (hex width) · Thread class: External 6g, Internal 6H · Tolerance: ±0.1 mm on L
| Thread (d) | A/F Hex (mm) | Male Thread Length (mm) | Total Length L (mm) — Standard | Custom L Available |
|---|---|---|---|---|
| M2.5 | 4.0 | 5 | 5 · 6 · 8 · 10 · 12 · 15 | Yes |
| M3 | 5.5 | 6 | 6 · 8 · 10 · 12 · 15 · 16 · 18 · 20 | Yes |
| M4 | 7.0 | 8 | 8 · 10 · 12 · 15 · 16 · 20 · 25 · 30 | Yes |
| M5 | 8.0 | 10 | 10 · 12 · 15 · 20 · 25 · 30 · 35 · 40 | Yes |
| M6 | 10.0 | 12 | 10 · 12 · 15 · 20 · 25 · 30 · 40 · 50 | Yes |
| M8 | 13.0 | 14 | 15 · 20 · 25 · 30 · 40 · 50 | Yes |
Tapped hole depth ≥ 1.5× diameter both ends · Thread class: Internal 6H · Tolerance: ±0.1 mm on L
| Thread (d) | A/F Hex (mm) | Tapped Hole Depth (mm) | Total Length L (mm) — Standard | Custom L Available |
|---|---|---|---|---|
| M2.5 | 4.0 | 5 | 5 · 6 · 8 · 10 · 12 · 15 | Yes |
| M3 | 5.5 | 6 | 6 · 8 · 10 · 12 · 15 · 20 · 25 | Yes |
| M4 | 7.0 | 8 | 10 · 12 · 15 · 20 · 25 · 30 · 40 | Yes |
| M5 | 8.0 | 10 | 10 · 12 · 15 · 20 · 25 · 30 · 40 · 50 | Yes |
| M6 | 10.0 | 12 | 15 · 20 · 25 · 30 · 40 · 50 | Yes |
| M8 | 13.0 | 14 | 20 · 25 · 30 · 40 · 50 | Yes |
External thread both ends · Thread class: External 6g · Tolerance: ±0.1 mm on L
| Thread (d) | A/F Hex W (mm) | Thread Length B each end (mm) | Body Length L (mm) — Standard | Custom Available |
|---|---|---|---|---|
| M3 | 5.5 | 6 | 6 · 8 · 10 · 12 · 15 · 20 | Yes |
| M4 | 7.0 | 8 | 8 · 10 · 12 · 15 · 20 · 25 | Yes |
| M5 | 8.0 | 10 | 10 · 12 · 15 · 20 · 25 · 30 | Yes |
| M6 | 10.0 | 12 | 12 · 15 · 20 · 25 · 30 · 40 | Yes |
| M8 | 13.0 | 14 | 20 · 25 · 30 · 40 · 50 | Yes |
American standard threads · Class 2A external / 2B internal · Typical hex shown — A/F and length matched to your assembly · Tolerance ±0.13 mm on L
| Thread (d) | Series | Thread Class | Typical Hex A/F (in · mm) | Custom Available |
|---|---|---|---|---|
| #4-40 | UNC | 2A / 2B | 3/16″ · 4.8 | Yes |
| #6-32 | UNC | 2A / 2B | 1/4″ · 6.4 | Yes |
| #8-32 | UNC | 2A / 2B | 1/4″ · 6.4 | Yes |
| #10-32 | UNF | 2A / 2B | 5/16″ · 7.9 | Yes |
| ¼-20 | UNC | 2A / 2B | 3/8″ · 9.5 | Yes |
We machine standoffs to your exact specification — any length, any thread combination, non-standard hex sizes, knurled bodies, grooves, or cross-holes. If you have a 2D drawing or even a sketch, we'll quote it.
All parts made to order. Send your specifications or use our standard programme. Quote within 24 hours. Worldwide export from Jamnagar, India.
Male-Female standoffs have a threaded stud on one end and an internal thread on the other, so they stack board-to-board or board-to-chassis. Female-Female standoffs have internal threads both ends and are fixed with screws from both sides — the most common PCB spacer. Male-Male standoffs have studs both ends and mount between two tapped or through-hole panels.
Threads cover M2.5, M3, M4, M5, M6 and M8 ISO metric plus #4-40 to ¼-20 UNC, with across-flats of 4, 5, 6, 7, 8, 10, 11 and 13 mm and lengths from 4 mm to 100 mm. Non-standard lengths and threads are machined to order.
Yes. Alongside ISO metric M2.5–M8 (class 6g/6H), we machine American inch UNC/UNF threads — #4-40, #6-32, #8-32, #10-32 and ¼-20 — to ASME B1.1 class 2A/2B. Mixed metric-and-inch combinations (e.g. a metric stud with an inch tapped hole) are made to order.
Brass is conductive (useful for grounding paths), non-magnetic, corrosion resistant and machines to tighter tolerances than nylon mouldings, while resisting thread stripping far better than plastic. Tin or nickel plating is available where solderability or a harder surface is needed — see the surface finishes guide.
Standoffs are machined from CW614N (CuZn39Pb3) brass per EN 12164, RoHS and REACH compliant, manufactured under ISO 9001, 14001 and 45001. All production is made to order with mill certificates available.
Brassland manufactures to the published EN, ISO and ASTM specifications below. Mill certificates per EN 10204 Type 3.1 are supplied as standard; Type 3.2 (third-party witnessed) available on request. Open any link to verify the standard directly with the publishing body.
Last reviewed: June 2026. All Brassland products are made to order — please confirm grade, surface finish, plating and packaging requirements at quotation stage. Standards listed above are referenced; production lots are released against the EN 10204 Type 3.1 inspection certificate accompanying each shipment.