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DIN 933 Hex Bolt
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DIN 933 Hex Bolt

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Product Description

DIN 933 - Hexagon head bolts with thread up to head

Leader-Fastener® DIN 933 Hex Head Cap Screws are fully threaded, have external coarse machine screw threads and, like other hex head screws, are used with both tapped holes and nuts. Their dimensions are similar to ISO 4017 and are available in Class 8.8, 10.9 and 12.9 steel and Class 70 (A2-70, A4-70) stainless steel; less common stainless steel sizes may be Class 50. Zinc plating protects against corrosion while plain finish is unplated and can rust. A2 stainless steel is considered the same as 18-8 and A4 is essentially 316. Class 8.8 and 10.9 thread tolerance for plain finish is 6g and 6h for plated; stainless steel is 6g; right-hand threads are standard. Also known as hex head bolts and tap bolts, all lengths are fully threaded. Length is measured from under the head to the tip. DIN 933 Hex Head Cap Screws are similar to ISO 4017, JIS B1180 and ANSI B18.2.3.1M. In contrast, DIN 931 is partially threaded and DIN 961 has fine threads. (Note: Thread pitch, the distance between threads, is traditionally omitted for fasteners with coarse threads but is included here for reference.)


Leader-Fastener® DIN 933 Hex Bolt


Screw Thread d M1.6 M2 M2.5 M3 (M3.5) M4 M5 M6 (M7) M8 M10 M12 (M14) M16
P Pitch 0.35 0.4 0.45 0.5 0.6 0.7 0.8 1 1 1.25 1.5 1.75 2 2
a max 1.05 1.2 1.35 1.5 1.8 2.1 2.4 3 3 3.75 4.5 5.25 6 6
c min 0.1 0.1 0.1 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.2
max 0.25 0.25 0.25 0.4 0.4 0.4 0.5 0.5 0.5 0.6 0.6 0.6 0.6 0.8
da max 2 2.6 3.1 3.6 4.1 4.7 5.7 6.8 7.8 9.2 11.2 13.7 15.7 17.7
dw Grade A min 2.4 3.2 4.1 4.6 5.1 5.9 6.9 8.9 9.6 11.6 15.6 17.4 20.5 22.5
Grade B min - - - - - 5.7 6.7 8.7 9.4 11.4 15.4 17.2 20.1 22
e Grade A min 3.41 4.32 5.45 6.01 6.58 7.66 8.79 11.05 12.12 14.38 18.9 21.1 24.49 26.75
Grade B min - - - - - 7.5 8.63 10.89 11.94 14.2 18.72 20.88 23.91 26.17
k Nominal Size 1.1 1.4 1.7 2 2.4 2.8 3.5 4 4.8 5.3 6.4 7.5 8.8 10
Grade A min 0.98 1.28 1.58 1.88 2.28 2.68 3.35 3.85 4.65 5.15 6.22 7.32 8.62 9.82
max 1.22 1.52 1.82 2.12 2.52 2.92 3.65 4.15 4.95 5.45 6.56 7.68 8.98 10.18
Grade B min - - - - - 2.6 3.26 3.76 4.56 5.06 6.11 7.21 8.51 9.71
max - - - - - 3 3.74 4.24 5.04 5.54 6.69 7.79 9.09 10.29
k1 min 0.7 0.9 1.1 1.3 1.6 1.9 2.28 2.63 3.19 3.54 4.28 5.05 5.96 6.8
r min 0.1 0.1 0.1 0.1 0.1 0.2 0.2 0.25 0.25 0.4 0.4 0.6 0.6 0.6
s max=nominal size 3.2 4 5 5.5 6 7 8 10 11 13 17 19 22 24
Grade A min 3.02 3.82 4.82 5.32 5.82 6.78 7.78 9.78 10.73 12.73 16.73 18.67 21.67 23.67
Grade B min - - - - - 6.64 7.64 9.64 10.57 12.57 16.57 18.48 21.16 23.16
Weight of per 1000 steel products(≈kg) - - - - - - - - - - - - - -


Screw Thread d (M18) M20 (M22) M24 (M27) M30 (M33) M36 (M39) M42 (M45) M48 (M52)
P Pitch 2.5 2.5 2.5 3 3 3.5 3.5 4 4 4.5 4.5 5 5
a max 7.5 7.5 7.5 9 9 10.5 10.5 12 12 13.5 13.5 15 15
c min 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.3 0.3 0.3 0.3 0.3
max 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 1 1 1 1 1
da max 20.2 22.4 24.4 26.4 30.4 33.4 36.4 39.4 42.4 45.6 48.6 52.6 56.6
dw Grade A min 25.3 28.2 30 33.6 - - - - - - - - -
Grade B min 24.8 27.7 29.5 33.2 38 42.7 46.5 51.1 55.9 59.9 64.7 69.4 74.2
e Grade A min 30.14 33.53 35.72 39.98 - - - - - - - - -
Grade B min 29.56 32.95 35.03 39.55 45.2 50.85 55.37 60.79 66.44 71.3 76.95 82.6 88.25
k Nominal Size 11.5 12.5 14 15 17 18.7 21 22.5 25 26 28 30 33
Grade A min 11.28 12.28 13.78 14.78 - - - - - - - - -
max 11.72 12.72 14.22 15.22 - - - - - - - - -
Grade B min 11.15 12.15 13.65 14.65 16.65 18.28 20.58 22.08 24.58 25.58 27.58 29.58 32.5
max 11.85 12.85 14.35 15.35 17.35 19.12 21.42 22.92 25.42 26.42 28.42 30.42 33.5
k1 min 7.8 8.5 9.6 10.3 11.7 12.8 14.4 15.5 17.2 17.9 19.3 20.9 22.8
r min 0.6 0.8 0.8 0.8 1 1 1 1 1 1.2 1.2 1.6 1.6
s max=nominal size 27 30 32 36 41 46 50 55 60 65 70 75 80
Grade A min 26.67 29.67 31.61 35.38 - - - - - - - - -
Grade B min 26.15 29.16 31 35 40 45 49 53.8 58.8 63.1 68.1 73.1 78.1
Weight of per 1000 steel products(≈kg) - - - - - - - - - - - - -


①,This standard specifies requirements for M1,6 to M52 hexagon head screws threaded up to the head, assigned to product grade A, for sizes up to M24 and lengths not exceeding 10d or 150 mm, and to product grade B for sizes greater than M24 or lengths exceeding 10 d or 150 mm.

②,For thread sizes not greater than M4,also permitted without chamfered end.




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