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

Imiyalelo

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.

Amathuluzi adingekayo:

Ibhulokhi Lokhuni OluqinileIbhulokhi Lokhuni Oluqinile
Isaha Se-CopingIsaha Se-Coping
Iqoqo LamafayelaIqoqo Lamafayela
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
2

Ram the mould

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

Amathuluzi adingekayo:

Isihlabathi sokubumbaIsihlabathi sokubumba
Ibhokisi lokubumbaIbhokisi lokubumba
Ifosholo LesandlaIfosholo Lesandla
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.

Izinto zokwakha zalesi sinyathelo:

Ingqimba yebhrasiIngqimba yebhrasi300 g
AmalahleAmalahle1 as required

Amathuluzi adingekayo:

Imbiza Yobumba EjulileImbiza Yobumba Ejulile
Iziko lezitiniIziko lezitini
Umfutho WomoyaUmfutho Womoya
Udlawu Lwesitsha SokuncibilikisaUdlawu Lwesitsha Sokuncibilikisa
Amagilavu okushiselaAmagilavu okushisela
Ipheshana LesikhumbaIpheshana Lesikhumba
Isivikelo SobusoIsivikelo Sobuso
4

Clean up

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

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
Isibambo SebhentshiIsibambo Sebhentshi
Iqoqo LamafayelaIqoqo Lamafayela
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.

Amathuluzi adingekayo:

Ibhola ElimileIbhola Elimile
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isibambo SebhentshiIsibambo Sebhentshi
Isethi yokusika izikulufuIsethi yokusika izikulufu
Isibambo sokusika ngaphakathiIsibambo sokusika ngaphakathi
Uwoyela wokusikaUwoyela wokusika
Insika enemicu yesikulufuInsika enemicu yesikulufu
Izibuko zokuphephaIzibuko zokuphepha

Izinto

2

Amathuluzi Adingekayo

23

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

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

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