THE NASTY BASTARD
NUT & BOLT GENERATOR
// Nut & Bolt Generator
Finally, nuts you can make bigger.
Bolts you can make longer & thicker.
Nut and bolt designs generated faster than your new brother.
NUT & BOLT GENERATORLIVE
Tap drill◇Clearance hole◇Thread pitch◇Seating torque◇Tap drill◇Clearance hole◇Thread pitch◇Seating torque◇
// spec it out
// thread size
// pitch
// length · mm
M8 × 1.25 × 40
Class 8.8Thread pitch1.25 mm
Tap drill Ø6.75 mm
Clearance hole Ø9.0 mm
Threads engaged32 ×
Seating torque25 Nm
Why it holds
01
Full control
Set the major diameter, pitch, thread angle, length, head and nut by hand — every dimension is yours to dial in.
02
Bench-ready numbers
Tap drill, clearance, torque and a spec plate that comes out 3D-print, CNC, or lathe ready.
03
Standard presets for fast moves
M3–M20 and UNC/UNF off the shelf when you just need it to fit — no fields to guess at.
For the production run
Pro
$5/mo
or $50/yr · save two months
- +Every standard & class
- +Torque + drill charts (PDF)
- +Counterbore & countersink
- +Unlimited saved specs
Nut up,
bolt down.
Make a fastener →// FAQ
Frequently asked questions
- What does the Nut & Bolt Generator do?
- It's a thread generator that builds matched nut-and-bolt pairs from a diameter, pitch, and clearance — the helix math done for you — ready to 3D print or machine.
- Can I 3D print the nuts and bolts it makes?
- Yes. The clearance is built in so the threads actually spin together instead of fusing solid, and it favors printer-friendly coarse pitches. Print the bolt standing up and the nut flat.
- Can I match an existing fastener?
- Yes. Measure the major diameter and pitch of the part you are matching, enter them, and generate a mating nut or bolt.
- Does it support metric and imperial threads?
- Both, coarse and fine, with the tap-drill and clearance-hole sizes worked out for you.
- Do I need to understand thread geometry?
- No. You pick the numbers and the generator builds the helical profile and its matching mate.