home Products Hexagon head bolts

Square Nuts

  • Brand:

    T,TGR,XDM,OEM as requirement

  • Brief:

    DIN557 square nut

  • Surface:

    Black oxide, Nickel, Possivation, Tin, Zinc Clear, Zinc Yellow, Zinc black

  • Material:

    stainless steel304,316,316L,317,317L,carbon steel,etc

  • Size:

    M5-M20,1/4-1-1/2,Custom-made

  • MOQ:

    According to size
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product details

These are square nuts.They’re easily gripped with a wrench due to their flat, broad sides, which also prevent them from rotating in channels and square holes. Compared to hex nuts, a greater area is in contact with the fastened surface. And compared to steel nuts, they’re slightly less strong.

Screw Thread d M5 M6 M8 M10 M10 M12 M12 M16 M20
P Pitch（Coarse thread） 0.8 1 1.25 1.5 1.5 1.75 1.75 2 2.5
e ≈ 11.3 14.1 18.4 22.6 24 25.4 26.9 33.9 42.4
k Nominal Size 4 5 6.5 8 8 10 10 13 16
max 4.6 5.6 7.25 8.75 8.75 10.75 10.75 13.9 16.9
min 3.4 4.4 6.75 7.25 7.25 9.25 9.25 12.1 15.1
s max 8 10 13 16 17 18 19 24 30
min 7.64 9.64 12.57 15.57 16.57 17.57 18.48 23.16 29.16
per 1000 units ≈ kg 1.31 2.77 5.5 10.7 13 16.3 19.1 38.2 73.5
Screw Thread d 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 (1-3/8) 1-1/2 (1-5/8)
PP BSW 20 18 16 14 12 12 11 10 9 8 7 7 6 6 5
BSF 26 22 20 18 16 16 14 12 11 10 9 9 8 8 8
s max 0.45 0.53 0.6 0.71 0.82 0.92 1.01 1.2 1.3 1.48 1.67 1.86 2.05 2.22 2.41
min 0.44 0.52 0.585 0.695 0.8 0.9 0.985 1.175 1.27 1.45 1.64 1.815 2.005 2.175 2.365
k max 0.22 0.27 0.332 0.395 0.467 0.53 0.602 0.728 0.81 0.935 1.06 1.205 1.33 1.455 1.58
min 0.2 0.25 0.312 0.375 0.437 0.5 0.562 0.687 0.75 0.875 1 1.125 1.25 1.375 1.5
Screw Thread d 1-3/4 2 2-1/4 2-1/2 2-3/4 3 (3-1/4) 3-1/2 (3-3/4) 4 4-1/2 5 5-1/2 6 -
PP BSW 5 4.5 4 4 3.5 3.5 3.25 3.25 3 3 2.875 2.75 2.625 2.5 -
BSF 7 7 6 6 6 5 5 4.5 4.5 4.5 4 4 4 4 -
s max 2.58 2.76 3.15 3.55 3.89 4.18 4.53 4.85 5.18 5.55 6.38 7.3 8.35 9.45 -
min 2.52 2.7 3.09 3.49 3.83 4.08 4.43 4.75 5.08 5.45 6.255 7.175 8.225 9.325 -
k max 1.73 1.85 1.975 2.225 2.475 2.775 3.025 3.275 3.525 3.775 4.2 4.7 5.2 5.7 -
min 1.63 1.75 1.875 2.125 2.375 2.625 2.875 3.125 3.375 3.625 4 4.5 5 5.5 -