Hex Nut vs Heavy Hex Nut

Hex nuts vs heavy hex nut

Types of Hex Nuts Manufactured via Cold forging and Threading Process

  • Machine Hex Nuts
  • Steel Hexagonal Nuts
  • Metric Hex Nuts
  • ACME Hex Nuts
  • Long Hex Nut
  • Hex Machine Screw Nuts
  • Industrial Hexagonal Nuts
  • Large Hex Nuts

Table of Content

Hex Nut vs Heavy Hex Nut Specification

Hex Nut vs Heavy Hex Nut Specification

Standard Sizes
  • 1/4 to 1-1/2
Hardness
  • 116 – 302
ISO Standard
  • ISO 4032
Thread
  • Coarse
  • Fine
Production Method
  • Cold formed
  • Warm formed
  • Hot formed
  • Hot forged,
  • Machined
Bearing Surface
  • Load over a wider area
  • Results in a larger bearing surface
Threads
  • Carbon steel
  • Alloy steel
  • Stainless steel
Heat treatment
  • Quenching
  • Tempering
Application
  • Construction
  • Industrial Machinery
  • Power Generation
  • Oil and Gas Industry
  • Transportation Equipment
Surface treament
  • Black Oxide Coating
  • Zinc Plating
  • Hot-Dip Galvanizing
  • Mechanical Galvanizing
  • Dacromet Coating
Coating
  • Hot-dip Galvanizing
  • Geomet-500
  • Zinc
  • PTFE
  • TAKECOAT-1000
Surface Finish of SAE 1018 Round Bar
  • Smooth Turned
  • Bright Drawn

Hot forged Heavy Hex Nuts in Grade 10.9, A2, A4, A194-2H, A194 7 and A194 Gr. 8/8M

Material 1.7729 1.7709 – – 1.7225
Grade 20CrMoVTiB4-10+QT 21CrMoV5-7+QT SA 193-B7 SA 193-B7 / 42CrMo4+QT 8.8 HQ
Name Durehete™ 1055 21HMF – – 8.8 / 42CrMo4+QT
Other spec Alloy T41 ST460TS GE – – EN 898-8.8
Specifications / norms EN 10269, PED 2014/68EU EN 10269, PED 2014/68EU, AD 2000-W0/W7 ASTM/ASME EN 10269, PED 2014/68EU, AD 2000-W0/W7, ASTM/ASME EN 10269, PED 2014/68EU, AD 2000-W0/W7
Marking WTE 1.7729 WTE GA WTE B7 WTE B7/GC WTE 8.8/GC
Condition QT QT QT QT QT
min Rp0,2 [MPa] – 550 – – –
min Rm [MPa] – 700 – – –
max Rm [MPa] – 850 – – –
min [°C] – 20 – – –
max [°C] – 550 – – –

Manufacturing Process of Hex Nuts

Manufacturing Process of Hex Nuts

Studs and Hex Nuts Tension Capacity
Nominal Size Stud Nut
Ts.c TN.c
B7M L43 7M 7M* 7
1/2 10,1 13,2 12,5 15,7 20,9
5/8 16,1 21,2 20,3 25,4 33,8
3/4 24,2 31,7 30,1 37,6 50,1
7/8 33,5 44,0 41,8 52,2 69,6
1 44,1 57,8 55,4 69,2 92,3
1 1/8 58,2 76,4 71,2 89,1 119
1 1/4 74,3 97,5 87,9 110 147
1 3/8 92,4 121 108 135 179
1 1/2 112 148 129 162 216
1 5/8 134 176 153 191 255
1 3/4 158 208 179 223 298
1 7/8 184 242 206 258 344
2 212 278 236 295 393
2 1/4 274 359 298 373 497
2 1/2 343 451 371 464 618
2 3/4 421 552 451 564 752
3 506 664 538 673 897
3 1/4 599 786 631 789 1052
3 1/2 700 919 734 918 1224
3 3/4 809 1061 845 1056 1408
4 925 1214 963 1204 1605
Surface Treatments of Hexagon Nuts
Surface Treament Black Oxide Coating Zinc Plating (Electroplating) Hot-Dip Galvanizing Mechanical Galvanizing Dacromet Coating

DIN Standard of Hex and Heavy Hex Nut

DIN Standard of Hex and Heavy Hex Nut

Hex Nuts Heavy Hex Nuts
DIN 934 DIN 6914
DIN 2510 DIN 6915 (Large Width Across Flats)
DIN 439  
DIN 980  
DIN 1587  
DIN 985  
DIN 547 (with 2 holes)  
DIN 555  
DIN 917 (Hex Cap Nuts)  
DIN 929 (Hex Weld Nuts)  
DIN 935 (Hex Castle Nuts)  
DIN 936 (Low Type)  

ISO Standard of Hex Nuts vs Heavy Hex Nuts

Hex Nuts Heavy Hex Nuts
ISO 4032 (Galvanized) ISO 4775
ISO 7414 (Structural)  
ISO 4035 (Thin)  
ISO 4034 (Class C)  
ISO 8673 (Coarse and Fine Thread)  
ISO 7035 (Castle Nuts)  
ISO 4035 (LOw Type)  
ISO 7042 (with clamping part)  

Hex Nuts Mechanical Properties

ASTM specification Stud A193 B7M Nut A194 7M Nut A194 7M* Stud A320 L43 Nut A194 7
σy, min ksi 80 60 75 105 100
σu, min ksi 100 80 94 125 119
Yield/ tensile ratio 0,80 0,75 0,80 0,84 0,84
HBW, min 200 159 2001 2502 248
HBW, max 235 235 235 321 327

Hex Nuts Failure Loads

Grade 2HM 2HM 7M 2HM 2HM 2HM 7M 2HM 2HM 7M 7M 7 7
Size 2 1/4 2 1/4 1 1/2 1 1/2 1 3/8 1 3/8 1 3/8 1 1/4 1 1/4 1 1/4 1 1/4 2 1/2 2 1/2
Proof load requirement (kips) 534 534 224 224 185 185 185 150 150 150 150 770 770
HBW reqirements 159-235 159-235 159-235 159-235 159-235 159-235 159-235 159-235 159-235 159-235 159-235 248-327 248-328
HBW actual 162 222 229 207 192 197 217 190 228 205 200 262 262
Actual failure load (kips) 524 489 248 238 203 193 202 182 174 183 165 741 718
Calculated failure load (kips) 403 552 247 223 172 177 195 139 167 150 147 810 810
Actual/calculated failure load ratio 1,30 0,89 1,01 1,07 1,18 1,09 1,04 1,31 1,04 1,22 1,12 0,92 0,89

Threads Types of Hex Nuts

METRIC UN WHITWORTH
Metric fine UNC UNB BSW
Metric coarse UNS UNF BSF

Heat Treated Steel Hex Nuts

Werkstoff Number 1.0501 1.0503 1.054 1.0601 1.1151 1.1181 1.1191 1.1221 1.6511 1.658 1.6582 1.7033 1.7035 1.7218 1.722
Name C 35 C 45 C 50 C 60 C22E (Ck 22) C35E (Ck 35) C45E (Ck 45) C22E (Ck 22) 36CrNiMo4 30CrNiMo8 34CrNiMo6 34Cr4 41Cr4 25CrMo4 34CrMo4
Mark Y – – – – Yk – – – – – – – – –

Hex Nuts for Low Temperature

Temperature (°C) -40 – – -60 – – – -100 – -120 – -196 – – – – – – – -270 –
Werkstoff 1.6582 1.658 – 1.7218 1.7258 1.7219 – 1.7225 – 1.568 – 1.4301 1.4307 1.4401 1.4404 1.498 2.4952 2.4669 – 1.4429 1.491
Short name 34CrNiMo6 30CrNiMo8 – 25CrMo4 24CrMo5 26CrMo4 – 42CrMo4 – X12Ni5 – X5CrNi18-10 X2CrNi18-9 X5CrNiMo17-12-2 X2CrNiMo17-12-2 X6NiCrTiMoVB25-15-2 NiCr20TiAl NiCr15Fe7TiAl – X2CrNiMoN17-13-3 X3CrNiMoBN17-13-3
Character(Symbol) – – – KG G KA – GC – KB – A2 A2 A4 A4 SD SB – – – –
AD-2000 – – – W10 – – – – – W10 – W10 W10 W10 W10 – – – – W10 W10
Specification DIN EN 10269 DIN EN 10269 – DIN EN 10269 zurückgezogen zurückgezogen – DIN EN 10269 – DIN EN 10269 – DIN EN 10269 DIN EN 10269 DIN EN 10269 DIN EN 10269 DIN EN 10269 DIN EN 10269 DIN EN 10269 – DIN EN 10269 DIN EN 10269
Equivalent – – – ∼SAE 4130 – – – ∼ASTM A320 L7 – ∼SAE 2515 – ∼AISI 304 ∼AISI 304 L ∼AISI 316 ∼AISI 316 L ∼AISI 660 ∼Alloy 80A ∼Alloy X-750 – ∼AISI 316 LN –

Type 4 Hex Nuts Dimensions

Screw Nominal M8 M10 M12 M14 M16 M18 M20
m Reference Dimensions 6.5 8 10 11 13 15 16
Tolerance 0 -0.36     0 -0.43  
s Reference Dimensions 13 17 19 22 24 27 30
Tolerance 0 -0.25     -0.35    
e (Approx.) 15 19.6 21.9 25.4 27.7 31.2 34.6
dw1 (Min.) 11.7 15.8 17.6 20.4 22.3 25.6 28.5
c (Approx.) 0.4 0.4 0.6 0.6 0.6 0.6 0.6

Application of Heavy Hex Nuts

  • Structural
  • Machinery equipment
  • Automotive
  • Aerospace

ASTM Specification of Standard Hex Nut vs Heavy Hex Nut

Material ASTM Specification Grades
Stainless Steel Hex Nuts ASTM / ASME A/SA 193 / 194 B 8 (304), B 8C (SS 347), B 8M (SS 316), B 8 T (SS 321), A 2, A 4
Nickel Alloy Hex Nuts ASTM / ASME SB 160 / 164 / 425 / 166 / 446 / 574 / 472 UNS 2200 (NICKEL 200) / UNS 2201 (NICKEL 201), UNS 4400 (MONEL 400), UNS 8825 (INCONEL 825), UNS 6600 (INCONEL 600) / UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276), UNS 8020 (ALLOY 20 / 20 CB 3)
Alloy Steel Hex Nuts ASTM / ASME A/SA 193 / 194 GR B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M

Weight Chart and Dimensions of Hex Nuts

Weight Chart of Hex Nuts

METRIC RANGE – DIMENSION (mm) AND WEIGHT (Kg) PER 100 PIECES
d M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 M42 M45 M48 M52 M56 M60 M64 M68 M72 M76 M80 M85
S Min 12.73 16.73 18.67 21.67 23.67 26.67 29.67 31.61 35.38 40.38 45.38 49.26 54.26 59.26 64.26 69.26 74.26 79.26 84.15 89.13 94.13 99.13 104.13 109.13 114.13 119.13
Max 13 17 19 22 24 27 30 32 36 41 46 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
e Min 14.38 18.9 21.1 24.49 26.75 30.14 33.53 35.72 39.98 45.63 51.28 55.8 61.31 66.95 72.61 78.26 83.91 89.56 95.07 100.72 106.37 112.02 117.67 123.32 128.97 134.62
Max 15 19.6 21.9 25.4 27.7 31.1 34.6 36.9 41.5 47.3 53.1 57.7 63.5 69.3 75 80.8 86.5 92.4 98.1 103.9 109.7 115.5 121.25 127 132.8 138.6
m Min 7.64 9.64 11.57 13.57 15.57 17.57 19.48 21.48 23.48 26.48 29.48 32.38 35.38 38.38 41.38 44.38 47.38 51.38 55.26 59.26 63.26 67.26 71.26 75.26 79.26 84.13
Max 8 10 12 14 16 18 20 22 24 27 30 33 36 39 42 45 48 52 56 60 64 68 72 76 80 85
WEIGHT 0.65 1.43 2.03 3.14 4.05 5.82 7.91 9.49 13.7 20 28.4 36.1 48.3 62.3 79.5 98.8 122 147 177 208 245 284 327 374 425 483

Heavy Hex Nuts Dimensions and Weight

Heavy Hex Nut Dimension

Bolt Dia. 1⁄2 5⁄8 3⁄4 7⁄8 13⁄8 11⁄2 1 11⁄8 11⁄4 15⁄8 13⁄4 31⁄4 31⁄2 2 21⁄2 23⁄4 3 33⁄4 4
F Width Across Flats Basic 7⁄8 11⁄16 11⁄4 17⁄16 23⁄16 23⁄8 15⁄8 113⁄16 2 29⁄16 23⁄4 5 53⁄8 31⁄8 37⁄8 41⁄4 45⁄8 53⁄4 61⁄8
Max 0.875 1.062 1.25 1.438 2.188 2.375 1.625 1.812 2 2.562 2.75 5 5.375 3 3.875 4.25 4.625 5.75 6.125
Min 0.85 1.031 1.212 1.394 2.119 2.3 1.575 1.756 1.938 2.481 2.662 4.838 5.2 3 3.75 4.112 4.475 5.562 5.925
C Width Across Corners Max 1.01 1.227 1.443 1.66 2.526 2.742 1.876 2.093 2.309 2.959 3.175 5.774 6.207 4 4.474 4.907 5.34 6.64 7.073
Min 0.969 1.175 1.382 1.589 2.416 2.622 1.796 2.002 2.209 2.828 3.035 5.515 5.928 3 4.275 4.688 5.102 6.341 6.755
H Thickness Basic 31⁄64 39⁄64 47⁄64 55⁄64 111⁄32 115⁄32 63⁄64 17⁄64 17⁄32 119⁄32 123⁄32 33⁄16 37⁄16 131⁄32 229⁄64 245⁄64 261⁄64 311⁄16 315⁄16
Max 0.504 0.631 0.758 0.885 1.378 1.505 1.012 1.139 1.251 1.632 1.759 3.252 3.506 2 2.505 2.759 3.013 3.76 4.014
Min 0.464 0.587 0.71 0.833 1.31 1.433 0.956 1.079 1.187 1.556 1.679 3.124 3.37 2 2.401 2.647 2.893 3.616 3.862
Weight(lbs.) 0.07 0.12 0.2 0.3 1.02 1.31 0.43 0.59 0.79 1.62 2.04 11.94 15.26 3 5.64 7.38 9.5 18.12 21.8
Part Numbers A563A Import Plain 11729 11731 11733 11735 11743 11745 11737 11739 11741 17750 11747 18395 18495 # 11753 15864 15863 – 11755
Galv. 11730 11732 11734 11736 11744 11746 11738 11740 11742 17751 11748 – – # 11754  16041 16042 – 11756
A1942H Domestic Plain – 16358 16360 16362 16374 16378 16364 16366 16370 16380 16384 – – # 16398 16400 16402 – 16404
Galv. – 16359 16361 16363 – – 16365 – – 16381 16385 – – # 16399 16401 16403 – 16405
Import Plain 11761 11763 11765 11767 11775 11777 11769 11771 11773 11779 12549 – – # 12553 12555 12601 – –
Galv. 11762 11764 11766 11768 11776 11778 11770 11772 11774 11780 12550 – – # 12554 12556 12602 – –
A563DH Domestic Plain 16356 – – – – – – – – 16380 16384 – – # 16398 16400 16402 – 16404
Galv. 18345 18346 18347 18348 16375 16379 18349 16367 16371 16381 16385 – – # 16399 16401 16403 – 16405