Farqiga fasalka bolt hexagon?

Kala-soocidda boolal saddex geesood ah:
1. Marka loo eego habka xoogga isku xirka, boolalyada loo isticmaalo godadka la isku dhejiyo waa in lagu dhejiyaa cabbirka godadka oo loo isticmaalo kiiska xoogga leexinta;
2, marka loo eego qaabka madaxa ee madaxa laba geesoodka, madaxa wareega, madaxa labajibbaaran, madaxa countersunk, iyo wixii la mid ah madaxa countersunk guud ee loo isticmaalo shuruudaha ka dib markii dusha sare ee isku xirka uu siman yahay iyada oo aan lahayn meel protuberant, sababtoo ah madaxa countersunk ayaa lagu dhejin karaa qaybaha

Dhererka boodhka ee fasalka A iyo fasalka B way kala duwan yihiin

Daboolka A wuxuu ka dheer yahay bolt B.
2. Saxnaanta wax-soo-saarku way ka duwan tahay
Saxnaanta wax soo saarka ee darajada A way ka sarraysaa ta fasalka B.
Heerka A iyo fasalka B waa boolal la safeeyey, oo leh dusha siman, cabbir sax ah, shuruudaha sare ee tayada daloolka, wax soo saarka adag iyo rakibida, iyo qiimaha sare, kuwaas oo dhif ah loo isticmaalo qaab dhismeedka birta.

https://www.china-bolt-pin.com/hex-excavator-bolt-and-nuts-1a2029-1a8063-2a1538-for-wear-part.html