Maboti a hexagonalamagwiritsidwa ntchito kulumikiza mbali zachitsulo pamodzi. Amagwiritsidwa ntchito kwambiri pomanga, makina ndi ntchito zamagalimoto. Mutu wa hex wa bawuti umalola kumangika mosavuta ndikumasula ndi wrench kapena socket, ndikupangitsa kukhala chisankho chodziwika bwino chosungira zinthu zolemetsa.

Kuti muyeze bawuti ya metric, muyenera kudziwa kukula kwake, kukwera kwake, ndi kutalika kwake.

1. Diameter: Gwiritsani ntchito caliper kuyeza kukula kwa bawuti. Mwachitsanzo, ngati ndi bawuti M20, m'mimba mwake ndi 20mm.

2. Mamvekedwe a ulusi: Gwiritsani ntchito pitch gauge kuyesa mtunda wa pakati pa ulusi. Izi zidzakuthandizani kudziwa kukwera kwa ulusi, komwe kuli kofunikira kuti mufanane ndi bolt ndi nati yoyenera.

3. Utali: Gwiritsani ntchito wolamulira kapena tepi kuyeza kutalika kwa bawuti kuchokera pansi pamutu mpaka kumapeto.

Mwa kuyeza mbali zitatuzi molondola, mutha kuzindikira ndikusankha bawuti yoyenera pakugwiritsa ntchito kwanu.

"TPI" imayimira "mizere pa inchi." Ndi muyeso womwe umagwiritsidwa ntchito kusonyeza kuchuluka kwa ulusi womwe umapezeka mu bawuti ya inchi imodzi kapena screw. TPI ndi mfundo yofunika kuiganizira pofananiza mabawuti ndi mtedza kapena kudziwa kugwirizana kwa chigawocho. Mwachitsanzo, bawuti ya 8 TPI imatanthauza kuti bawutiyo ili ndi ulusi wathunthu 8 mu inchi imodzi.

Kuti mudziwe ngati bolt ndi metric kapena mfumu, mutha kutsatira izi:

1. Dongosolo la kuyeza: Yang'anani zolembera pa mabawuti. Ma metric bolts nthawi zambiri amalembedwa ndi chilembo "M" chotsatiridwa ndi nambala, monga M6, M8, M10, ndi zina zotero, kusonyeza kukula kwake mu millimeters. Maboti a Imperial nthawi zambiri amalembedwa ndi kachigawo kakang'ono kapena nambala yotsatiridwa ndi "UNC" (Unified National Coarse) kapena "UNF" (Unified National Fine), kusonyeza muyezo wa ulusi.

2. Mamvekedwe a ulusi: Amayesa mtunda pakati pa ulusi. Ngati muyeso uli mu millimeters, ndiye kuti ndi metric bolt. Ngati muyeso uli mu ulusi pa inchi (TPI), ndiye kuti ndi bolt yachifumu.

3. Zolemba pamutu: Mabawuti ena amatha kukhala ndi zolembera m'mitu mwawo kusonyeza giredi kapena muyezo. Mwachitsanzo, ma bawuti a metric amatha kukhala ndi zolembera monga 8.8, 10.9, kapena 12.9, pomwe mabawuti achifumu amatha kukhala ndi zolembera monga "S" kapena zilembo zina zamabawu omangidwa.

Poganizira izi, mutha kudziwa ngati bolt ndi metric kapena mfumu.