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Wing Nut: Sand-Cast in Brass, Drilled and Tapped
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18. Oktoba 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.
Kati
1 day

Maagizo

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.

Zana zinazohitajika:

Kipande cha mbao ngumuKipande cha mbao ngumu
Msumeno wa kukata mikunjoMsumeno wa kukata mikunjo
Seti ya tupaSeti ya tupa
Kipima-unene cha dijitali cha inchi 6Kipima-unene cha dijitali cha inchi 6
2

Ram the mould

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

Zana zinazohitajika:

Mchanga wa kusubuMchanga wa kusubu
Sanduku la kuundiaSanduku la kuundia
Mwiko mdogo wa bustaniMwiko mdogo wa bustani
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.

Vifaa kwa hatua hii:

Kitofali cha shaba nyeupeKitofali cha shaba nyeupe300 g
MkaaMkaa1 as required

Zana zinazohitajika:

Kaure ya Udongo Yenye KinaKaure ya Udongo Yenye Kina
Tanuru la matofaliTanuru la matofali
MivuoMivuo
Koleo la kaure ya kuyeyushiaKoleo la kaure ya kuyeyushia
Glavu za kulehemuGlavu za kulehemu
Aproni ya NgoziAproni ya Ngozi
Ngao ya UsoNgao ya Uso
4

Clean up

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

Zana zinazohitajika:

Msumeno wa chumaMsumeno wa chuma
Kibano cha meza ya kaziKibano cha meza ya kazi
Seti ya tupaSeti ya tupa
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.

Zana zinazohitajika:

Kekee cha NguzoKekee cha Nguzo
Seti ya vichimbuziSeti ya vichimbuzi
Kibano cha meza ya kaziKibano cha meza ya kazi
Seti ya kukata nyuzi za skrubuSeti ya kukata nyuzi za skrubu
Mpini wa kukata nyuzi za ndaniMpini wa kukata nyuzi za ndani
Mafuta ya kukatiaMafuta ya kukatia
Fimbo yenye nyuziFimbo yenye nyuzi
Miwani ya usalamaMiwani ya usalama

Vifaa

2

Zana Zinazohitajika

23

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Nati ya mabawa

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Brass Fittings: Sand-Cast on a Core, Then Tapped

Brass Fittings: Sand-Cast on a Core, Then Tapped

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