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Wing Nut: Sand-Cast in Brass, Drilled and Tapped
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Forge

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Forge

18. October 2026NO
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Wing Nut: Sand-Cast in Brass, Drilled and Tapped

A wing nut has two wings so it can be turned by hand without tools. The standard (ASME B18.6.9) sorts them by how they are made: cold forged, hot forged, die cast or stamped from sheet. In a workshop the cast kind can be made by sand casting brass from a wooden pattern, then drilling and tapping the hole. Method and sizes are ours. The picture: our drawing.
Intermediate
1 day

Instructions

1

Make the pattern

Saw and file a hardwood pattern: a round boss 16 mm across and 12 mm high with two flat wings rising from opposite sides, 40 mm tip to tip. Taper every face a little so it draws from the sand. Make several nuts at once from one mould.

Tools needed:

Hardwood BlockHardwood Block
Coping SawCoping Saw
File SetFile Set
Digital Caliper 6-InchDigital Caliper 6-Inch
2

Ram the mould

Ram the patterns up in the flask, draw them, and cut a sprue and runners to each cavity.

Tools needed:

Casting SandCasting Sand
Moulding FlaskMoulding Flask
Hand TrowelHand Trowel
3

Melt and pour

Melt the brass in a clay crucible in the furnace and pour the mould full in one go. Let it cool.

Materials for this step:

Brass IngotBrass Ingot300 g
CharcoalCharcoal1 as required

Tools needed:

Clay Crucible - DeepClay Crucible - Deep
Brick FurnaceBrick Furnace
BellowsBellows
Crucible TongsCrucible Tongs
Welding GlovesWelding Gloves
Leather ApronLeather Apron
Face ShieldFace Shield
4

Clean up

Shake out, saw off the runners and file the wings smooth and the boss faces flat.

Tools needed:

HacksawHacksaw
Bench ViseBench Vise
File SetFile Set
5

Drill and tap

Drill the boss through square to its face with the tapping drill for M8 (6.8 mm), then tap M8 with cutting oil. Check it runs on M8 threaded rod.

Tools needed:

Drill PressDrill Press
Drill Bit SetDrill Bit Set
Bench ViseBench Vise
Tap and Die SetTap and Die Set
Tap WrenchTap Wrench
Cutting OilCutting Oil
Threaded RodThreaded Rod
Safety GlassesSafety Glasses

Materials

2

Tools Required

23

This blueprint makes

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Wing Nut

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