External Dimensions —
Allowance
| Max | Min | Mean | Tol | |
|---|---|---|---|---|
| Major dia | — | — | — | — |
| Pitch dia | — | — | — | — |
| Minor dia | — | — | — |
Flat at root
Root rad max
Root rad min
Height (basic)
Pipe diameter
| Pipe Face | Gage Notch | |
|---|---|---|
| Major dia | — | — |
| Pitch dia | — | — |
| Minor dia | — | — |
Crest radius
Root radius
Height (mean)
Taper angle
Thread angle
Internal Dimensions —
| Min | Max | Mean | Tol | |
|---|---|---|---|---|
| Minor dia | — | — | — | — |
| Pitch dia | — | — | — | — |
| Major dia | — | — |
Flat at root
Height (basic)
| Pipe End L1 | Pipe Face | |
|---|---|---|
| Minor dia | — | — |
Pitch (gage notch)
Tap drill
Tap depth (ref)
Display Options
Length units
Thread angle units
Appearance
Measurement Over Wires
| MOW max | — |
|---|---|
| MOW min | — |
| Wire best | — |
| Wire max | — |
| Wire min | — |
| Constant | — |
Thread Type & Size
Classes of Fit
Starts · Pitch · Lead
Pitch
Lead
Lead angle
Thread Mill · Fusion PDOFusion PDO (Ø) — a diametric offset (not radial) for Autodesk Fusion's Thread toolpath. Enter a thread mill Ø here to compute it (blank until then); values are per the NYC CNC method: external 1.4·base − √3·c, internal 1.2·base − √3·c, where base = major − minor and the tip flat c is your measured value or an estimate of Ø ÷ 100. A starting value — verify fit on a test cut; other CAM may differ. Method after Saunders Machine Works / NYC CNC.
Tip flat used
Ext. PDO (Ø)
Int. PDO (Ø)
Tap Drills
Hole (theoretical)
| Drill | Dia | % |
|---|
Pipe Thread Detail
| Crest | Root | |
|---|---|---|
| Flat (min–max) | — | — |
| Truncation (min–max) | — | — |
L1 hand-tight
L2 effective
L3 wrench makeup
L4 overall
Notes & Provenance
—
Data & formulas from public standards.
Fresh reimplementation of ME ThreadPal by Michael Rainey — gratefully acknowledged.
Prerelease software, verify critical values against the governing standard.
This software is provided free of charge and without any warranty, express or implied. The
user is responsible for verifying accuracy and is solely liable for any unintended
consequences.
Please report any issues or inaccuracies you find to
github.com/npolanosky/threadbuddy/issues.
Coating / Polishing
| Before max | Before min | After max | After min | |
|---|---|---|---|---|
| Major | — | — | — | — |
| Pitch | — | — | — | — |
| Minor | — | — | — | — |
Adds material on the selected hand; 4× rule for 60° pitch diameter.