ASME B16.11 Threaded Fitting Dimensions
Dimensions of ASME B16.11 forged threaded (screwed) fittings in millimetres for 90° and 45° elbows, tees, crosses, couplings, half couplings, caps, plugs and bushings in Class 2000, 3000 and 6000, from NPS ⅛" to 4".
Threads are NPT to ASME B1.20.1 unless BSPT is ordered. Teshi Group manufactures these fittings as an OEM from ASTM A105 and A182 forgings.
Key to dimensions
- A
- Centre to end — 90° elbow, tee and cross
- C
- Centre to end — 45° elbow
- H
- Outside diameter of band
- B
- Minimum length of thread
- L2
- Minimum effective thread length
- W
- End to end — full coupling
- P
- End to end — half coupling (W ÷ 2)
- D
- Outside diameter of coupling
- G
- End to end — cap
ASME B16.11 Threaded Fitting dimensions — tables
Threaded elbows, tees and crosses (mm)
| NPSin | DN | A2000 | A3000 | A6000 | C 45°2000 | C 45°3000 | C 45°6000 | H2000 | H3000 | H6000 | BThread length | L2Effective thread |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ⅛" | 6 | 21 | 21 | 25 | 17 | 17 | 19 | 22 | 22 | 25 | 6.4 | 6.7 |
| ¼" | 8 | 21 | 25 | 28 | 17 | 19 | 22 | 22 | 25 | 33 | 8.1 | 10.2 |
| ⅜" | 10 | 25 | 28 | 33 | 19 | 22 | 25 | 25 | 33 | 38 | 9.1 | 10.4 |
| ½" | 15 | 28 | 33 | 38 | 22 | 25 | 28 | 33 | 38 | 46 | 10.9 | 13.6 |
| ¾" | 20 | 33 | 38 | 44 | 25 | 28 | 33 | 38 | 46 | 56 | 12.7 | 13.9 |
| 1" | 25 | 38 | 44 | 51 | 28 | 33 | 35 | 46 | 56 | 62 | 14.7 | 17.3 |
| 1¼" | 32 | 44 | 51 | 60 | 33 | 35 | 43 | 56 | 62 | 75 | 17.0 | 18.0 |
| 1½" | 40 | 51 | 60 | 64 | 35 | 43 | 44 | 62 | 75 | 84 | 17.8 | 18.4 |
| 2" | 50 | 60 | 64 | 83 | 43 | 44 | 52 | 75 | 84 | 102 | 19.0 | 19.2 |
| 2½" | 65 | 76 | 83 | 95 | 52 | 52 | 64 | 92 | 102 | 121 | 23.6 | 28.9 |
| 3" | 80 | 86 | 95 | 106 | 64 | 64 | 79 | 109 | 121 | 146 | 25.9 | 30.5 |
| 4" | 100 | 106 | 114 | 114 | 79 | 79 | 79 | 146 | 152 | 152 | 27.7 | 33.0 |
Threaded couplings, caps, plugs and bushings (mm)
| NPSin | DN | WFull coupling | PHalf coupling | D3000 | D6000 | GCap, 3000 | GCap, 6000 | Square head plugMin. length |
|---|---|---|---|---|---|---|---|---|
| ⅛" | 6 | 32 | 16.0 | 16 | 22 | 19 | — | 10 |
| ¼" | 8 | 35 | 17.5 | 19 | 25 | 25 | 27 | 11 |
| ⅜" | 10 | 38 | 19.0 | 22 | 32 | 25 | 27 | 13 |
| ½" | 15 | 48 | 24.0 | 28 | 38 | 32 | 33 | 14 |
| ¾" | 20 | 51 | 25.5 | 35 | 44 | 37 | 38 | 16 |
| 1" | 25 | 60 | 30.0 | 44 | 57 | 41 | 43 | 19 |
| 1¼" | 32 | 67 | 33.5 | 57 | 64 | 44 | 46 | 21 |
| 1½" | 40 | 79 | 39.5 | 64 | 76 | 44 | 48 | 21 |
| 2" | 50 | 86 | 43.0 | 76 | 92 | 48 | 51 | 22 |
| 2½" | 65 | 92 | 46.0 | 92 | 108 | 60 | 64 | 27 |
| 3" | 80 | 108 | 54.0 | 108 | 127 | 65 | 68 | 28 |
| 4" | 100 | 121 | 60.5 | 140 | 159 | 68 | 75 | 32 |
Fitting class and matching pipe schedule
| Type | Class | Pipe schedule |
|---|---|---|
| Threaded | 2000 | Sch 80 (XS) |
| Threaded | 3000 | Sch 160 |
| Threaded | 6000 | XXS |
| Socket-welding | 3000 | Sch 80 (XS) |
| Socket-welding | 6000 | Sch 160 |
| Socket-welding | 9000 | XXS |
Notes
- Dimensions are in millimetres unless stated otherwise.
- The half-coupling length P is calculated as half the full-coupling length W.
- A dash means the standard does not list that size in that class.
Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.
Equivalent and related standards to ASME B16.11 Threaded Fitting Dimensions
All equivalents| Region | Standard | Relationship |
|---|---|---|
| USA | MSS SP-79 / SP-83 / SP-95 / SP-97 | Inserts, unions, swage nipples and integrally reinforced branch outlets |
| China | GB/T 14383 | Forged steel socket-welding and threaded fittings — ASME B16.11 dimensions |
| China | SH/T 3410 | Petrochemical forged fittings |
| Japan | JIS B2316 | Steel socket-welding pipe fittings |
| UK | BS 3799 | Steel pipe fittings, screwed and socket-welding (withdrawn) |
| India | IS 1239-2 | Mild steel tubular and threaded fittings |
Teshi Group manufactures flanges and fittings to all of these standards on request, including Chinese GB / HG / SH and European EN dimensions for export projects. Always confirm bolting, facing and thickness when substituting one standard for another.
Dimension finder
Pick a product, standard and size — or just type — to see every dimension and download a watermarked PDF for that one size.
ASME B16.11 Threaded Fitting Dimensions — size by size
Every size has its own page with a drawing, mm and inch values and a one-size PDF.
FAQ
ASME B16.11 threaded fitting dimensions: common questions
Which schedule of pipe is used with Class 3000 threaded fittings?
Schedule 160. Class 2000 threaded fittings match Schedule 80 pipe and Class 6000 match XXS.
Related products, data sheets and standards
Forged Threaded Fittings
OEM manufacturer
View online · PDFASME B16.11ASME B16.11 socket weld fitting dimensions
Socket weld elbow, tee, cross, coupling and cap dimensions, Class 3000, 6000 and 9000.
View online · PDFASME B1.20.1NPT thread dimensions (ASME B1.20.1)
Threads per inch, pitch, engagement lengths and pitch diameters of NPT taper pipe threads.
View online · PDFOEM manufacturerThreaded Fittings
NPS ⅛"–4" · CS / SS
Open
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.