Hex Nuts

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Hex nuts are metal fasteners having six sides. They can be used with bolts, washers, anchors, studs, threaded rods & screws. They are designed to fasten two or more wood / metal parts or...Read more

GRAINGER -

Hex Nut 7/8 Carbon Steel

StyleModelFinishGradeRockwell HardnessPrice
AU04225.087.0001Hot Dipped GalvanizedDHC24 to C38€6.13
BU04025.087.0001PlainCB78 to C38€7.77
CU04026.087.0001PlainA563C24 to C38€10.82
APPROVED VENDOR -

Low Carbon Steel Hex Nut, Furnace Black Finish

StyleModelDia./Thread SizeHeightThread SizeWidthPrice
A6CA42M3 x 0.52.4mmM3 x 0.55.5mm€38.65
B6CA43M4 x 0.73.2mmM4 x 0.77mm€15.05
LISLE -

Hex Nuts

StyleModelPrice
ALS/65660€2.08
RFQ
ALS/65720€1.43
RFQ
ALS/25840€0.94
RFQ
APPROVED VENDOR -

A2 Stainless Steel Hex Nut

StyleModelDia./Thread SizeHeightThread SizeWidthPrice
AM51080.020.0001M2-0.41.6mmM2 x 0.44mm€4.21
BM51080.025.0001M2-0.452mmM2 x 0.455mm€4.03
AM51080.030.0001M3 x 0.52.4mmM3 x 0.55.5mm€4.00
CM51080.040.0001M4 x 0.73.2mmM4 x 0.77mm€1.55
DM51080.050.0001M5 x 0.84mm-8mm€2.15
EM51080.060.0001M6 x 15mm-10mm€4.07
FM51080.100.0001M10 x 1.58mm-17mm€19.07
AM51080.140.0001M14 x 211mm-22mm€17.30
GM51080.180.0001M18 x 2.515mm-27mm€20.84
HM51080.220.0001M22-2.518mmM22 x 2.532mm€7.70
IM51080.240.0001M24 x 319mm-36mm€14.33
AM51080.270.0001M27 x 322mm-41mm€11.63
JM51080.300.0001M30 x 3.524mm-46mm€25.31
AM51080.330.0001M33-3.526mmM33 x 3.550mm€19.28
CALBRITE -

Hex Nuts

StyleModelDia./Thread SizeHeightWidthPrice
AS61000HN001-857/64"1 47/64"€22.47
BS60500HN001/2"-1329/64"3/4"€6.04
CS60200HN001/4"-2015/64"7/16"€1.50
DS60700HN003/4"-1043/64"1 19/64"€15.72
ES60300HN003/8"-1611/32"21/32"€2.90
FS60600HN005/8"-119/16"1 3/32"€13.90
APPROVED VENDOR -

Carbon Steel Hex Nut, Hot Dipped Galvanized Finish

StyleModelDia./Thread SizeHeightWidthPrice
A313002-BR1/2"-1331/64"7/8"-
RFQ
BHN2H0625011025G5/8"-1139/64"1 1/16"€29.75
ACCURATE MANUFACTURED PRODUCTS GROUP -

Hex Nuts

StyleModelDia./Thread SizeHeightStyleSystem of MeasurementThread TypeWidth Across FlatsPrice
AZNJ61688C1-835/64"Hex NutInchUNC (Coarse)1 1/2"€116.16
AZNJ61688F1-1435/64"Hex NutInchUNF (Fine)25/64"€122.05
AZNJ61612C1/2"-135/16"Hex NutInchUNC (Coarse)3/4"€49.95
AZNJ61612F1/2"-205/16"Hex NutInchUNF (Fine)3/4"€52.08
AZNJ61614C1/4"-205/32"Hex NutInchUNC (Coarse)7/16"€21.33
AZNJ61614F1/4"-285/32"Hex NutInchUNF (Fine)7/16"€22.42
AZNJ61634C3/4"-1027/64"Hex NutInchUNC (Coarse)1 1/8"€103.14
AZNJ61634F3/4"-1627/64"Hex NutInchUNF (Fine)1 1/8"€104.83
AZNJ61638C3/8"-167/32"Hex NutInchUNC (Coarse)9/16"€27.06
AZNJ61638F3/8"-247/32"Hex NutInchUNF (Fine)9/16"€31.74
AZNJ61658C5/8"-113/8"Thin NutInchUNC (Coarse)15/16"€66.23
AZNJ61658F5/8"-183/8"Hex NutInchUNF (Fine)15/16"€67.25
AZNJ61651C5/16"-183/16"Hex NutInchUNC (Coarse)1/2"€21.77
AZNJ61651F5/16"-243/16"Hex NutInchUNF (Fine)1/2"€24.89
BNUT930M2.5CM2.5x0.452.0 mmHex NutMetricMetric5.0 mm€12.40
BNUT930M2CM2x0.41.6 mmHex NutMetricMetric4.0 mm€13.44
BNUT930M3CM3x0.52.4 mmHex NutMetricMetric5.5 mm€12.68
BNUT930M4CM4x0.73.2 mmHex NutMetricMetric7.0 mm€16.56
BNUT930M5CM5x0.84.7 mmHex NutMetricMetric8.0 mm€16.75
AZNJ616M6M6x13.2 mmHex NutMetricMetric10.0 mm€21.46
BNUT930M6CM6x15.2 mmHex NutMetricMetric10.0 mm€17.06
BNUT930M8CM8x1.256.8 mmHex NutMetricMetric13.0 mm€18.02
AZNJ616M8M8x1.254.0 mmHex NutMetricMetric13.0 mm€23.98
BNUT930M10CM10x1.58.4 mmHex NutMetricMetric16.0 mm€20.12
AZNJ616M10M10x1.55.0 mmHex NutMetricMetric17.0 mm€29.40
APPROVED VENDOR -

Low Carbon Steel Hex Nut, Hot Dipped Galvanized Finish

StyleModelDia./Thread SizeGradeHeightProperty ClassRockwell HardnessTypeWidthPrice
A13M2151 1/4-7"21 1/16"2B68 to C32-1.875"€378.35
B13D9661 1/4-7"2-2---€31.32
C12P5841 1/4-7"2H1 7/32"2HC24 to C38Heavy2"€47.96
D12P5821 1/8-7"2H1 7/64"2HC24 to C38Heavy1 13/16"€34.55
E13D9651 1/8-7"2-2---€22.90
F13E0281"-82-2---€283.37
G12P5021"-8255/64"2B68 to C32Full1.5"€11.17
H12P5811"-82H63/64"2HC24 to C38Heavy1.625"€13.79
I12P4981/2"-1327/16"2B68 to C32Full3/4"€8.85
J12P5791/2"-132H31/64"2HC24 to C38Heavy7/8"€14.40
F13E0241/2"-132-2---€290.96
K12P4951/4"-2027/32"2B68 to C32Full7/16"€4.06
L13M2141/4"-2027/32"2B68 to C32-7/16"€343.70
M12P4993/4"-10241/64"2B68 to C32Full1.125"€10.00
F13E0263/4"-102-2---€309.49
N12H2033/4"-102H47/64"2H--1.25"€1,237.05
O12P4973/8"-16221/64"2B68 to C32Full9/16"€6.54
F13E0233/8"-162-2---€351.57
F13E0255/8"-112-2---€303.56
P323240-PG5/8"-11235/64"-HRC32Full15/16"€13.41
F13E0225/16"-182-2---€348.01
Q12P4965/16"-18217/64"2B68 to C32Full1/2"€6.23
D12P5807/8"-92H55/64"2HC24 to C38Heavy1.437"€9.71
D12P5017/8"-923/4"2B68 to C32Full1 5/16"€8.53
F13E0277/8"-92-2---€354.05
GRAINGER -

Hex Nut 1-1/4 Carbon Steel

StyleModelFinishGradeRockwell HardnessThread SizePrice
AU04225.125.0001Hot Dipped GalvanizedDHC24 to C381 1/4-7€75.21
BU04025.125.0001PlainCB78 to C381 1/4-7€33.44
CU04026.125.0001PlainA563C24 to C381.25mm€29.30
APPROVED VENDOR -

A4 Stainless Steel (Comparable to 316 Stainless Steel) Hex Jam Nut, Plain Finish

StyleModelDia./Thread SizeHeightWidthPrice
A6CB51M6 x 13.2mm10mm€18.61
B6CB52M8 x 1.254mm13mm€26.79
C6CB53M10 x 1.55mm17mm€22.30
D6CB54M12 x 1.756mm19mm€20.36
StyleModelDia./Thread SizeHeightSizeWidthPrice
A2CCK5M6 x 15mmM6 x 110mm€994.00
A2CCK6M8 x 1.256.5mm-13mm€904.72
A2CCK7M16 x 213mmM16 x 224mm€915.19
APPROVED VENDOR -

18-8 Stainless Steel Hex Nut

StyleModelDia./Thread SizeHeightThread SizeThread TypeWidthPrice
AU51080.150.00011 1/2-6"1 9/32"7UNC2.25"€80.96
BU51160.150.00021 1/2-12"1 9/32"13UNF2.25"€200.58
CU51080.125.00011 1/4-7"1 1/16"8UNC1.875"€66.83
DU51160.125.00021 1/4-12"1 1/16"13UNF1.875"€5.87
CU51080.112.00011 1/8-7"31/32"8UNC1 11/16"€36.75
EU51160.112.00021 1/8-12"31/32"13UNF1 11/16"€110.74
CU51160.101.00021"-1455/64"-UNF-€28.88
FU51160.050.00021/2"-207/16"-UNF3/4"€14.23
CU51080.025.00011/4"-207/32"-UNC7/16"€5.41
GU51160.025.00021/4"-287/32"-UNF7/16"€4.48
CU51160.075.00023/4"-1641/64"-UNF1.125"€25.46
HU51160.037.00023/8"-2421/64"-UNF9/16"€9.24
IU51080.031.00015/16"-1817/64"-UNC1/2"€8.54
CU51160.031.00025/16"-2417/64"-UNF1/2"€6.43
JU51160.043.00027/16"-203/8"-UNF11/16"€6.14
KU51080.056.00019/16"-1231/64"-UNC7/8"€28.30
CU51160.056.00029/16"-1831/64"-UNF7/8"€43.42
APPROVED VENDOR -

Low Carbon Steel Hex Nut, Yellow Zinc-Plated Finish

StyleModelDia./Thread SizeGradeHeightProperty ClassRockwell HardnessSystem of MeasurementThread SizeThread TypePrice
A3HED21 3/4-5"81.5"8C26 to C36Inch6UNC€29.09
B3HEC71 3/8-6"81 11/64"8C26 to C36Inch7UNC€10.30
C3HEC81 3/8-12"81 11/64"8C26 to C36Inch13UNF€15.05
D3HED32-4-1/2"81 23/32"8C26 to C36Inch2.5UNC€50.02
C4RXN32-12"81.75"8C26 to C36Inch-UNF€348.65
E3HED42-12"81 23/32"8C26 to C36Inch2-12UNF€56.70
F4RXP37/8"-983/4"8C26 to C34Inch-UNC€550.25
G6CA54M3 x 0.5Class 102.4mm10C36 max.MetricM3 x 0.5Metric€43.16
H6CA55M4 x 0.7Class 103.2mm10C36 max.MetricM4 x 0.7Metric€27.76
I6CA56M5 x 0.8Class 104mm10C36 max.Metric-Metric€17.65
J5ZY61M30 x 3.5Class 1024mm10C36 max.Metric-Metric€11.33
K5ZY63M36 x 4Class 1029mm10C36 max.Metric-Metric€17.63
GRAINGER -

Carbon Steel Hex Nut, Yellow Zinc Finish

StyleModelDia./Thread SizeFinishHeightThread TypeWidthPrice
AN04122.100.00011-8Zinc Yellow55/64"UNC (Coarse)1.5"€24.77
BA04122.100.00011-8Zinc Yellow55/64"UNC (Coarse)1.5"€237.34
CA04120.100.00011-8Plain55/64"UNC (Coarse)1.5"€276.23
DN04120.100.00011-8Plain55/64"UNC (Coarse)1.5"€19.41
EA04180.100.00031-14Plain55/64"UNS1.5"€276.29
FN04180.100.00031-14Plain55/64"UNS1.5"€18.59
GN04120.050.00011/2"-13Plain7/16"UNC (Coarse)3/4"€49.22
HA04120.050.00011/2"-13Plain7/16"UNC (Coarse)3/4"€775.28
EA04180.050.00021/2"-20Plain7/16"UNF (Fine)3/4"€507.23
IN04180.050.00021/2"-20Plain7/16"UNF (Fine)3/4"€42.45
JN04120.025.00011/4"-20Plain7/32"UNC (Coarse)7/16"€48.43
KA04120.025.00011/4"-20Plain7/32"UNC (Coarse)7/16"€1,859.81
LA04181.025.00021/4"-28Zinc Yellow7/32"UNF (Fine)7/16"€724.55
MN04180.025.00021/4"-28Plain7/32"UNF (Fine)7/16"€18.01
NN04181.025.00021/4"-28Zinc Yellow7/32"UNF (Fine)7/16"€17.01
EA04180.025.00021/4"-28Plain7/32"UNF (Fine)7/16"€692.53
ON04122.075.00013/4"-10Zinc Yellow41/64"UNC (Coarse)1.125"€35.02
PA04122.075.00013/4"-10Zinc Yellow41/64"UNC (Coarse)1.125"€239.11
QN04120.075.00013/4"-10Plain41/64"UNC (Coarse)1.125"€31.76
RA04120.075.00013/4"-10Plain41/64"UNC (Coarse)1.125"€264.65
SN04180.075.00023/4"-16Plain41/64"UNF (Fine)1.125"€32.79
EA04180.075.00023/4"-16Plain41/64"UNF (Fine)1.125"€275.26
TN04181.075.00023/4"-16Zinc Yellow41/64"UNF (Fine)1.125"€36.20
UA04181.075.00023/4"-16Zinc Yellow41/64"UNF (Fine)1.125"€363.42
VA04122.037.00013/8"-16Zinc Yellow21/64"UNC (Coarse)9/16"€1,046.17
GRAINGER -

Hex Nut 1 Carbon Steel

StyleModelDia./Thread SizeFinishGradeRockwell HardnessPrice
AU04225.100.00011"-8Hot Dipped GalvanizedDHC24 to C38€74.62
AU04025.100.00011"-8PlainCB78 to C38€26.57
BU04026.100.00011-8PlainA563C24 to C38€17.21
APPROVED VENDOR -

Carbon Steel Hex Nut, Zinc-Plated Finish

StyleModelDia./Thread SizeGradeHeightProperty ClassRockwell HardnessSystem of MeasurementThread SizeThread TypePrice
AU08110.125.00011 1/4-7"21 1/16"2B70 to B100Inch8UNC€20.16
AU01300.125.00011 1/4-7"51 1/16"-C19 to C30Inch8UNC€28.14
BU01330.125.00021 1/4-12"51 1/16"-C19 to C30Inch13UNF€28.42
CU08161.125.00021 1/4-12"21 1/16"2B70 to B100Inch13UNF€19.62
DU01300.112.00011 1/8-7"531/32"5C19 to C30Inch8UNC€20.63
AU08110.112.00011 1/8-7"231/32"2B70 to B100Inch8UNC€14.10
EU08161.112.00021 1/8-12"231/32"2B70 to B100Inch13UNF€12.27
FU01330.112.00021 1/8-12"531/32"5C19 to C30Inch13UNF€15.07
GU01300.100.00011"-8555/64"5C19 to C30Inch-UNC€11.41
AU08110.100.00011"-8255/64"2B70 to B100Inch-UNC€11.73
HU08110.050.00011/2"-1327/16"-B70 to B100Inch-UNC€12.13
IU01300.050.00011/2"-1357/16"5C19 to C30Inch-UNC€11.52
AU08161.050.00021/2"-2027/16"-B70 to B100Inch-UNF€11.50
AU01330.050.00021/2"-2057/16"5C19 to C30Inch-UNF€13.22
JU08110.025.00011/4"-2027/32"-B70 to B100Inch-UNC€6.01
AU01330.025.00021/4"-2857/32"-C19 to C30Inch-UNF€8.87
AU08161.025.00021/4"-2827/32"-B70 to B100Inch-UNF€5.37
KU08110.075.00013/4"-10241/64"-B70 to B100Inch-UNC€20.51
LU01300.075.00013/4"-10541/64"5C19 to C30Inch-UNC€20.61
MU08161.075.00023/4"-16241/64"-B70 to B100Inch-UNF€14.50
NU01330.075.00023/4"-16541/64"5C19 to C30Inch-UNF€24.11
AU01300.037.00013/8"-16521/64"-C19 to C30Inch-UNC€13.23
AU08110.037.00013/8"-16221/64"-B70 to B100Inch-UNC€12.30
AU08161.037.00023/8"-24221/64"-B70 to B100Inch-UNF€10.92
AU01330.037.00023/8"-24521/64"-C19 to C30Inch-UNF€15.09
GRAINGER -

Thin Nut

StyleModelBasic MaterialDia./Thread SizeFinishGradeHeightThread TypeWidthPrice
AM51090.160.0001Stainless SteelM16 x 2PlainA28mmMetric24mm€35.71
BM51090.080.0001Stainless SteelM8 x 1.25PlainA24mmMetric13mm€17.73
CM51090.140.0001Stainless SteelM14 x 2PlainA27mmMetric22mm€40.24
DM51090.030.0001Stainless SteelM3 x 0.5PlainA21.8mmMetric5.5mm€6.90
EM51090.200.0001Stainless SteelM20 x 2.5PlainA210mmMetric30mm€41.29
FM51090.240.0001Stainless SteelM24 x 3PlainA212mmMetric36mm€29.72
GM51090.300.0001Stainless SteelM30 x 3.5PlainA215mmMetric46mm€25.10
HM51090.040.0001Stainless SteelM4 x 0.7PlainA22.2mmMetric7mm€9.35
IM51090.120.0001Stainless SteelM12 x 1.75PlainA26mmMetric19mm€40.83
JM51090.100.0001Stainless SteelM10 x 1.5PlainA25mmMetric17mm€30.03
KM51090.060.0001Stainless SteelM6 x 1PlainA23.2mmMetric10mm€10.20
LM51090.050.0001Stainless SteelM5 x 0.8PlainA22.7mmMetric8mm€9.11
MM11380.240.0200SteelM24-2Zinc-PlatedClass 412mmMetric Fine36mm€51.14
NM11360.420.0001SteelM42 x 4.5Zinc-PlatedClass 421mmMetric65mm€17.51
OM11380.120.0150SteelM12 x 1.5Zinc-PlatedClass 46mmMetric Fine19mm€38.17
PM11380.240.0150SteelM24-1.5Zinc-PlatedClass 412mmMetric Fine36mm€67.03
QM11380.220.0150SteelM22-1.5Zinc-PlatedClass 411mmMetric Fine32mm€51.14
RM11380.200.0150SteelM20-1.5Zinc-PlatedClass 410mmMetric Fine30mm€16.31
SM11360.030.0001SteelM3 x 0.5Zinc-PlatedClass 41.8mmMetric5.5mm€7.15
TM11360.160.0001SteelM16 x 2Zinc-PlatedClass 48mmMetric24mm€37.76
UM11360.180.0001SteelM18 x 2.5Zinc-PlatedClass 49mmMetric27mm€30.07
VM11360.200.0001SteelM20 x 2.5Zinc-PlatedClass 410mmMetric30mm€29.11
WM11360.220.0001SteelM22-2.5Zinc-PlatedClass 411mmMetric32mm€70.49
XM11360.330.0001SteelM33-3.5Zinc-PlatedClass 416.5mmMetric50mm€75.67
YM11360.360.0001SteelM36 x 4Zinc-PlatedClass 418mmMetric55mm€50.98
UNISTRUT -

Hex Nut

StyleModelSize
AHHXN050-EG1/2"
RFQ
AHHXN025-EG1/4"
RFQ
BHHXN075-EG3/4"
RFQ
AHHXN037-EG3/8"
RFQ
BHHXN062-EG5/8"
RFQ
AHHXN031-EG5/16"
RFQ
StyleModelBolt SizeThread Size
A50CHENBOX1/2"1/2-13
RFQ
A25CHENBOX1/4"1/4-20"
RFQ
A38CHENBOX3/8"3/8-16"
RFQ
A62CHENBOX5/8"5/8-11
RFQ
GRAINGER -

Carbon Steel Hex Nut, Plain Finish

StyleModelDia./Thread SizeFinishGradeHeightSystem of MeasurementThread TypeWidthPrice
AN01100.100.00011-8PlainGrade 555/64"InchUNC (Coarse)1.5"€16.56
BA01100.100.00011-8PlainGrade 555/64"InchUNC (Coarse)1.5"€184.73
CA01300.100.00011-8Zinc-PlatedGrade 555/64"InchUNC (Coarse)1.5"€195.30
DB01100.100.00011-8PlainGrade 555/64"InchUNC (Coarse)1.5"€143.99
EN01300.100.00011-8Zinc-PlatedGrade 555/64"InchUNC (Coarse)1.5"€17.50
FA01120.100.00031-14PlainGrade 555/64"InchUNS1.5"€229.01
GA01330.100.00031-14Zinc-PlatedGrade 555/64"InchUNS1.5"€267.84
HN01330.100.00031-14Zinc-PlatedGrade 555/64"InchUNS1.5"€18.10
IN01120.100.00031-14PlainGrade 555/64"InchUNS1.5"€16.37
JB01100.050.00011/2"-13PlainGrade 57/16"InchUNC (Coarse)3/4"€137.30
KA01300.050.00011/2"-13Zinc-PlatedGrade 57/16"InchUNC (Coarse)3/4"€578.96
LN01100.050.00011/2"-13PlainGrade 57/16"InchUNC (Coarse)3/4"€40.41
MA01100.050.00011/2"-13PlainGrade 57/16"InchUNC (Coarse)3/4"€633.29
NN01300.050.00011/2"-13Zinc-PlatedGrade 57/16"InchUNC (Coarse)3/4"€41.03
OA01330.050.00021/2"-20Zinc-PlatedGrade 57/16"InchUNF (Fine)3/4"€388.36
PN01120.050.00021/2"-20PlainGrade 57/16"InchUNF (Fine)3/4"€25.61
QA01120.050.00021/2"-20PlainGrade 57/16"InchUNF (Fine)3/4"€385.10
RN01330.050.00021/2"-20Zinc-PlatedGrade 57/16"InchUNF (Fine)3/4"€26.30
SA01100.025.00011/4"-20PlainGrade 57/32"InchUNC (Coarse)7/16"€988.12
TA01300.025.00011/4"-20Zinc-PlatedGrade 57/32"InchUNC (Coarse)7/16"€1,352.43
UN01100.025.00011/4"-20PlainGrade 57/32"InchUNC (Coarse)7/16"€27.34
VN01300.025.00011/4"-20Zinc-PlatedGrade 57/32"InchUNC (Coarse)7/16"€41.97
WN01330.025.00021/4"-28Zinc-PlatedGrade 57/32"InchUNF (Fine)7/16"€45.54
XA01330.025.00021/4"-28Zinc-PlatedGrade 57/32"InchUNF (Fine)7/16"€1,765.84
YN01120.025.00021/4"-28PlainGrade 57/32"InchUNF (Fine)7/16"€40.86
APPROVED VENDOR -

Hex Nut Machine Screw

StyleModelDia./Thread SizeHeightWidthPrice
A325120-PG#6-327/64"5/16"€3.87
A325140-PG#8-321/8"11/32"€3.78
12...67

Hex Nuts

Hex nuts are metal fasteners having six sides. They can be used with bolts, washers, anchors, studs, threaded rods & screws. They are designed to fasten two or more wood / metal parts or create bolted joints to prevent movement. Raptor Supplies offers these hex nuts from brands like Grainger, Woodhead, Vulcan Hart, Banjo, Apollo, Fabory, Texas Pneumatic Tools, C Sherman Johnson, Disco, Dynaform & more.

Frequently Asked Questions

What standards do these nuts comply with?

  • ANSI
  • RoHS
  • ASME
  • DIN
  • FDA
  • ISO
  • SAE
  • UL

Why are hex nuts easy to turn?

Hexagonal-shaped nuts are easier to turn than other types of fasteners as they have six parallels and require less turning distance / radius. They only need one-sixth or 30 degrees of turning each time to reach the next flat parallel.

How are male or female NPSM threads installed to seal connections?

If you are mating NPSM threads with NPTF or NPT threads, make use of sealant or pipe tape to assure liquid and air-tight sealing.

What is the difference between internal and external drive styles?

The tool needed to tighten a fastener depends on its drive type. Deeper grooves and more points of contact on internal drive designs provide a sturdy grip and need less power to tighten. On the other hand, even lesser force is required to tighten external drive types as they may be secured using a wrench or socket.

How to determine fasteners' strength through Grade or Class?

  • SAE: They are used for Imperial fasteners. The higher the grade, the stronger the fastener. Fasteners with the same grade are designed to be used together. They include SAE Grade 2, 5 and 8 fasteners for light to heavy fastening / stress applications.
  • ISO: Metric fasteners have classifications according to ISO standards. The higher the class, the stronger the fastener. Fasteners with the same first digit are used together. They are available in ISO Class 4, 5, 6, 8, 10 and 12 for light duty fastening or high-stress applications.
  • ASTM: ASTM grades fasteners based on strength. They are available in ASTM Grade 2H, 7, 8, 8M and DH for high strength, stress, pressure & temperature applications. ASTM Grade C units are medium-strength steel nuts.
  • ASME: They are available in Grade F & G for medium or high-stress applications.