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Click Specification

(Non-preferred) dimensions in parentheses.

Unit:mm

Small Hexagon Nuts

GB 51 - 1976

Display drawing:

国标GB 51 - 1976 GB51 51GB Small Hexagon Nuts
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Calculate weight and price. Weight 1000 pcs : kg x $ per kg = $ 1000 pcs
Default density g/cm3
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Choose materials based on density.(g/cm3)

  • Carbon Steel 7.85
  • Stainless Steel 8.1
  • Stainless Steel 7.95
  • Stainless Steel 7.7
  • Titanium Alloy 4.5
  • Aluminum Alloy 2.8
  • Copper 8.89


Select here or enter material density on the calculation page.
Thread Size
d
M8 M10 M12 (M14) M16 (M18) M20 (M22) M24 (M27) M30 M36 M42 M48
P Pitch
s max
min
m Nominal Size
max
min
e
per 1000 units ≈ kg
1.25 1.5 1.75 2 2 2.5 2.5 2.5 3 3 3.5 4 4.5 5
12 14 17 19 22 24 27 30 32 36 41 50 55 65
11.76 13.76 16.76 18.72 21.72 23.72 26.72 29.72 31.66 35.66 40.66 49.66 54.6 64.6
6 8 10 11 13 14 16 18 19 22 24 28 32 38
6.24 8.29 10.29 11.35 13.35 14.35 16.35 18.35 19.42 22.42 24.42 28.42 32.5 38.5
5.76 7.71 9.71 10.65 12.65 13.65 15.65 17.65 18.58 21.58 23.58 27.58 31.5 37.5
13.8 16.2 19.6 21.9 25.4 27.7 31.2 34.6 36.9 41.6 47.3 57.7 63.5 75
3.667 6.175 11.67 15.88 25.62 30.08 43.92 61.45 72.22 104.7 154.8 274.1 344.3 603.8
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1 Hexagon Nuts, Style 1 - Product Grades A and B [ISO]
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2 Hex Machine Screw Nuts [Table1-1] [ASME/ANSI]
ASME/ANSI B 18.2.2 (T1-1 Hex) - 2010 		Hex Machine Screw Nuts [Table1-1]

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3 Hex Machine Screw Nuts [Table 1] (ASTM A563 / F594 / F467) [ASME]
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4 Hexagon High Nuts, Style 2 - Product Grades A and B [ISO]
ISO 4033 - 2012 		Hexagon High Nuts, Style 2 - Product Grades A and B

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5 Hexagon Regular Nuts, Style 1 - Product Grades A and B [ISO]
ISO 4032 - 2023 		Hexagon Regular Nuts, Style 1 - Product Grades A and B

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8 Hexagon Nuts, Style 2 - Product Grades A and B [ISO]
ISO 4033 - 1999 		Hexagon Nuts, Style 2 - Product Grades A and B

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11 Hex Flat Nuts [Table 3] [ASME/ANSI]
ASME/ANSI B 18.2.2 (T3) - 2010 		Hex Flat Nuts [Table 3]

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12 Hex Nuts and Hex Jam Nuts [Table 5] (ASTM A563 / F594 / F467) [ASME]
ASME B 18.2.2 (T5) - 2022 		Hex Nuts and Hex Jam Nuts [Table 5] (ASTM A563 / F594 / F467)

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13 Hex Flat Nuts and Hex Flat Jam Nuts [Table4] (ASTM A563 / F594 / F467) [ASME]
ASME B 18.2.2 (T4) - 2022 		Hex Flat Nuts and Hex Flat Jam Nuts [Table4] (ASTM A563 / F594 / F467)

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14 Hexagon Nuts with Metric Coarse and Fine Pitch thread, Product Classes A and B [DIN]
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15 Hex Nuts and Hex Jam Nuts [Table 4] (ASTM A563 / F594 / F467) [ASME]
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16 Hexagon High Nuts,Style 2 - Product Grades A and B [ISO]
ISO 4033 - 2023 		Hexagon High Nuts,Style 2 - Product Grades A and B

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17 Hexagon Nuts, Metric Threads, Product Grades A and B [DIN]
DIN 934 - 1982 		Hexagon Nuts, Metric Threads, Product Grades A and B

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18 Thick Hexagon Nuts (Special Purpose) - ISO Metric Coarse and Fine Thread - Finish A [UNI]
UNI 5587 - 1968 		Thick Hexagon Nuts (Special Purpose) - ISO Metric Coarse and Fine Thread - Finish A

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19 Type 1, Grade A, Hexagon Nuts [JIS]
JIS B 1181 - 1993 		Type 1, Grade A, Hexagon Nuts

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20 Hexagon Nuts, Type 1 - Product Grades A and B [GB]
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21 Hexagon Nuts, Style 2 [GB]
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22 Hexagon Nuts, Style 1 [Table 1] [JIS]
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23 B.A. Hexagonal Ordinary (or full) Nuts and Thin (or lock) Nuts [Table 6] [BS]
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24 Hexagon Nuts, Type 1 [GB]
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26 Hexagon Nuts,Style 2 [GB]
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27 Hexgon Nuts, Style 2 - Product Grade A and B [GB]
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28 Hexagon Nuts, Style 1 [GB]
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29 Hexagon Nuts [YJT]
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30 Metric Hex Nuts,Style 2 (ASTM A563M / F836M / F467M) [ASME]
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31 Hexagon Nuts - Style1, Metric Coarse Thread, Product Grades A and B, ISO 4032 Modified [DIN]
DIN 970 - 1982 		Hexagon Nuts - Style1, Metric Coarse Thread, Product Grades A and B, ISO 4032 Modified
32 Hexagon Nuts - Product Grades C [EN]
EN 24034 - 1991 		Hexagon Nuts - Product Grades C
33 Hexagon Regular Nuts (Style 1) - Product Grade C [ISO]
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34 Hexagon Regular Nuts (Style 1) - Product Grade A and B [DIN EN ISO]
DIN EN ISO 4032 - 2013 		Hexagon Regular Nuts (Style 1) - Product Grade A and B
35 Hexagon Nuts, Style 2 - Product Grades A and B [EN]
EN 24033 - 1991 		Hexagon Nuts, Style 2 - Product Grades A and B
36 Small Pattern Hex Machine Screw Nuts [Table 2] (ASTM A563 / F594 / F467) [ASME]
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37 Hexagon Nuts, Style 1 - Product Grades A and B [DIN EN]
DIN EN 24032 - 1992 		Hexagon Nuts, Style 1 - Product Grades A and B
38 Hexagon Nuts, Style 1 - Product Grades A and B [EN]
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39 Small Pattern Hex Machine Screw Nuts [Table 1-2] [ASME/ANSI]
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40 Hexagon Nuts - Product Grade C, M5 To M100×6 [DIN]
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41 Hexagon Nuts - Product Grade C [DIN EN]
DIN EN 24034 - 1992 		Hexagon Nuts - Product Grade C
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44 Metric Hexagon Nuts [ASME/ANSI]
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45 Hexagon Nuts - Product Grade C [ISO]
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46 Hexagon Regular Nuts(Style 1) - Product Grade C [DIN EN ISO]
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47 Plastic Hexagon Nuts [DIN]
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48 Hexagon Nuts - Type C [JIS]
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49 Hexagon Nuts, Finished, [Table JA.9] [JIS]
JIS B 1181 - 2014 		Hexagon Nuts, Finished, [Table JA.9]
50 Hexagon Nuts [GB]
GB 52 - 1976 		Hexagon Nuts
51 Type 2, Grade B, Hexagon Nuts [JIS]
JIS B 1181 - 1993 		Type 2, Grade B, Hexagon Nuts
52 Hexagon Nuts, Regular, [Table JA.13] [JIS]
JIS B 1181 - 2014 		Hexagon Nuts, Regular, [Table JA.13]
53 Small Hexagon Nuts, Semi-finished, [Table JA.17] [JIS]
JIS B 1181 - 2014 		Small Hexagon Nuts, Semi-finished, [Table JA.17]
54 ISO Metric Hexagon Nuts - Black [Table 7] [BS]
BS 4190 (T7) - 2014 		ISO Metric Hexagon Nuts - Black [Table 7]
55 Hexagon Thin Nuts with B.S.Threads - Faced One Side or Both Side - Black [Table 3] [BS]
BS 916 - 1953 		Hexagon Thin Nuts with B.S.Threads - Faced One Side or Both Side - Black [Table 3]
56 ISO Metric Hexagon Nuts - Black [Table 12] [BS]
BS 4190 (T12) - 2001 		ISO Metric Hexagon Nuts - Black [Table 12]
57 Hexagon Screw Nuts, Size #0 To #12 [BS]
BS 1981 - 1991 		Hexagon Screw Nuts, Size #0 To #12
58 Small Hexagon Nuts, Finished, [Table JA.15] [JIS]
JIS B 1181 - 2014 		Small Hexagon Nuts, Finished, [Table JA.15]
59 Unified Hexagon Thick Ordinary Nuts [BS]
BS 1768 - 1963 		Unified Hexagon Thick Ordinary Nuts
60 Metric Precision Hexagon Nuts [BS]
BS 3692 - 2014 		Metric Precision Hexagon Nuts
61 Hexagon Nuts, Style 1 - Product Grades A and B [NF]
NF E 25-401 - 2001 		Hexagon Nuts, Style 1 - Product Grades A and B
62 Machine Screw Nuts with B.S.W. & B.S.F. Threads - Precision Type [Table 10] [BS]
BS 450 - 1958 		Machine Screw Nuts with B.S.W. & B.S.F. Threads - Precision Type [Table 10]
63 Hexagon Nuts, Style 2 [Table 3] [JIS]
JIS B 1181 - 2004 		Hexagon Nuts, Style 2 [Table 3]
64 Screwed Type Malleable Cast iron Pipe Fittings - Class I Backnuts (locknuts) [JIS]
JIS B 2301 (A16) - 2013 		Screwed Type Malleable Cast iron Pipe Fittings - Class I Backnuts (locknuts)
65 Hexagon Nuts [NF]
NF E 27-711 - 1982 		Hexagon Nuts
66 Hexagon Nuts - Finished [Table 1-1] [JIS]
JIS B 1181 - 1993 		Hexagon Nuts - Finished [Table 1-1]
67 Small Hexagon Nuts - Semi-finished [Table 2-2] [JIS]
JIS B 1181 - 1993 		Small Hexagon Nuts - Semi-finished [Table 2-2]
68 Hexagon Nuts, Product Grade C, [Table 5] [JIS]
JIS B 1181 - 2004 		Hexagon Nuts, Product Grade C, [Table 5]
69 Hexagon Nuts, Style 1, with Fine Pitch Thread - Product Grades A and B [NF]
NF E 25-451 - 2001 		Hexagon Nuts, Style 1, with Fine Pitch Thread - Product Grades A and B
70 Hexagon Nuts, Style 2 - Product Grades A and B [NF]
NF E 25-407 - 2001 		Hexagon Nuts, Style 2 - Product Grades A and B
71 Hexagon Nut, Style 2, Coarse Thread, [Table 11] [JIS]
JIS B 1181 - 2014 		Hexagon Nut, Style 2, Coarse Thread, [Table 11]
72 Unified Hexagon Ordinary Nuts - Heavy Series - Double Chamfered [BS]
BS 1769 - 1951 		Unified Hexagon Ordinary Nuts - Heavy Series - Double Chamfered
73 Black Hexagon Nuts [BS]
BS 325 - 1947 		Black Hexagon Nuts
74 Hexagon Nut, Style 2, Fine Thread, [Table 14-15] [JIS]
JIS B 1181 - 2014 		Hexagon Nut, Style 2, Fine Thread, [Table 14-15]
75 Hexagon Nuts with B.S.Threads - Black [Table 3] [BS]
BS 916 - 1953 		Hexagon Nuts with B.S.Threads - Black [Table 3]
76 Hexagon Nuts - Regular [Table 1-3] [JIS]
JIS B 1181 - 1993 		Hexagon Nuts - Regular [Table 1-3]
77 Hexagon Foundation Nuts [JIS]
JIS B 1220 - 2010 		Hexagon Foundation Nuts
78 Hexagon Nut, Style 1, Fine Thread [Table 2] [JIS]
JIS B 1181 - 2004 		Hexagon Nut, Style 1, Fine Thread [Table 2]
79 Type 2, Grade A, Hexagon Nuts [JIS]
JIS B 1181 - 1993 		Type 2, Grade A, Hexagon Nuts
80 Small Hexagon Nuts - Finished [Table 2-1] [JIS]
JIS B 1181 - 1993 		Small Hexagon Nuts - Finished [Table 2-1]
81 Unified Hexagon Ordinary Nuts [BS]
BS 1768 - 1963 		Unified Hexagon Ordinary Nuts
82 Hexagon Nuts - Style 1 [UNI]
UNI 5588 - 1965 		Hexagon Nuts - Style 1
83 Spectacle Frames - Hexagon Nuts [JIS]
JIS B 1119 (3H) - 1986 		Spectacle Frames - Hexagon Nuts
84 Type 1, Grade B, Hexagon Nuts [JIS]
JIS B 1181 - 1993 		Type 1, Grade B, Hexagon Nuts
85 Unified Hexagon Ordinary Nuts - Heavy Series - Full Bearing [BS]
BS 1769 - 1951 		Unified Hexagon Ordinary Nuts - Heavy Series - Full Bearing
86 Hexagon Nuts - Semi-Finished [Table 1-2] [JIS]
JIS B 1181 - 1993 		Hexagon Nuts - Semi-Finished [Table 1-2]
87 ISO Metric Hexagon Nuts - Faced Under Head [Table 7] [BS]
BS 4190 (T7) - 2014 		ISO Metric Hexagon Nuts - Faced Under Head [Table 7]
88 Hexagon Nuts, Style 2, with Metric Fine Pitch Thread - Product Grades A and B [NF]
NF E 25-452 - 2001 		Hexagon Nuts, Style 2, with Metric Fine Pitch Thread - Product Grades A and B
89 Hexagon Foundation Nuts [JIS]
JIS B 1220 - 2015 		Hexagon Foundation Nuts
90 Hexagon Nuts - Product Grade C [GB]
GB /T 41 - 2000 		Hexagon Nuts - Product Grade C
91 Hexagon Nuts, Semi-finished, [Table JA.11] [JIS]
JIS B 1181 - 2014 		Hexagon Nuts, Semi-finished, [Table JA.11]
92 Hexagon Nuts, Style 1 - Product Grade C [GB]
GB /T 41 - 2016 		Hexagon Nuts, Style 1 - Product Grade C
93 Hexagon Nuts [GB]
GB /T 17116.3 - 2018 		Hexagon Nuts
94 Precision Hexagon Nuts - B.S.W. & B.S.F. Threads [BS]
BS 1083 - 1965 		Precision Hexagon Nuts - B.S.W. & B.S.F. Threads
95 Screwed Type Malleable Cast iron Pipe Fittings - Class II Backnuts [JIS]
JIS B 2301 (A40) - 2013 		Screwed Type Malleable Cast iron Pipe Fittings - Class II Backnuts
96 Metric Hexagon Nuts [BS]
BS 3692 - 2001 		Metric Hexagon Nuts
97 Hexagon Nut, Style 1, Fine Thread, [Table 7-8] [JIS]
JIS B 1181 - 2014 		Hexagon Nut, Style 1, Fine Thread, [Table 7-8]
98 Unified Hexagon Lock Nuts - Heavy Series [BS]
BS 1769 - 1951 		Unified Hexagon Lock Nuts - Heavy Series
99 Hexagon Nuts - Product Grade C [NF]
NF E 25-402 - 2001 		Hexagon Nuts - Product Grade C
100 ISO Metric Hexagon Nuts, Style 1 - Product Grades A and B [AS]
AS 1112.1 - 2000 		ISO Metric Hexagon Nuts, Style 1 - Product Grades A and B