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- A square nut is a four-sided nut. Compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening (though also greater resistance to tightening). They are also much less likely to become rounded-off after repeated loosening/tightening cycles. Square nuts are typically mated with square-headed bolts. Square nuts are used along with flat washers to avoid damage from its sharp edges and increase the strength of the fastener. Square nuts can have standard, fine or coarse threading with platings of zinc yellow, plain, zinc clear, tin and cadmium, among others. Most can meet either the ASTM A194, ASTM A563, or ASTM F594 standard. (en)
- 方形螺母是一個四方形螺母。在反复鬆動/擰緊循環後，它們也不太可能變圓。方形螺母通常與方頭螺栓配合。方形螺母與平墊圈一起使用，以避免其鋒利邊緣的損壞，並有助於增加緊固件的強度。方形螺母可以具有標準，細或粗的螺紋，表面具有鉻酸鹽轉化鍍層。大多數可以符合ASTM A194，ASTM A563或ASTM F594標準。 (zh)
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- A square nut is a four-sided nut. Compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening (though also greater resistance to tightening). They are also much less likely to become rounded-off after repeated loosening/tightening cycles. Square nuts are typically mated with square-headed bolts. Square nuts are used along with flat washers to avoid damage from its sharp edges and increase the strength of the fastener. Square nuts can have standard, fine or coarse threading with platings of zinc yellow, plain, zinc clear, tin and cadmium, among others. Most can meet either the ASTM A194, ASTM A563, or ASTM F594 standard. (en)
- 方形螺母是一個四方形螺母。在反复鬆動/擰緊循環後，它們也不太可能變圓。方形螺母通常與方頭螺栓配合。方形螺母與平墊圈一起使用，以避免其鋒利邊緣的損壞，並有助於增加緊固件的強度。方形螺母可以具有標準，細或粗的螺紋，表面具有鉻酸鹽轉化鍍層。大多數可以符合ASTM A194，ASTM A563或ASTM F594標準。 (zh)
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- Square nut (en)
- 方形螺母 (zh)
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