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Structural Flat Washer

Steel Structural Flat Washers

Steel structural flat washers are thicker than standard washers and are primarily used in heavy duty construction. These washers will often feature gripping attributes in order to prevent spinning.


Finish : EcoGuard®
Material : Steel
System of Measurement: Metric
System of Measurement: Metric
Also known as the SI system, this measurement system is used across the globe. It is based on multiples of ten and uses meters, centimeters, millimeters as its basic measurements.
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
M12 13mm 24mm 3.00mm 11552475 EA 1.45
M14 15mm 27mm 1.60mm 11552476 EA 2.01
M16 17mm 30mm 4.30mm 11552477 EA 1.61
M20 21mm 37mm 4.30mm 11552478 EA 2.41
Finish : Mechanical Galvanized
Material : Steel
System of Measurement: Imperial (Inch)
System of Measurement: Imperial (Inch)
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
1/2" 0.527" 1.187" 0.188" Load Indicating 33299 EA 4.83
1/2" 0.527" 1.187" 0.188" Load Indicating Squirter® 0157602 EA 3.92
1/2" 0.531" 1.062" 0.177" 0133549 MPK 813.50
1/2" 0.531" 1.062" 0.177" 1133172 PKG 6.78
1/2" 0.531" 1.062" 0.177" 33172 EA 0.24
5/8" 0.658" 1.375" 0.250" Load Indicating 33300 EA 4.48
5/8" 0.658" 1.375" 0.250" Load Indicating Squirter® 0157603 EA 4.62
5/8" 0.688" 1.312" 0.177" 0133550 MPK 774.62
5/8" 0.688" 1.312" 0.177" 1133173 PKG 4.89
5/8" 0.688" 1.312" 0.177" 33173 EA 0.70
3/4" 0.790" 1.625" 0.250" Load Indicating 33301 EA 3.99
3/4" 0.790" 1.625" 0.250" Load Indicating Squirter® 0157604 EA 6.02
3/4" 0.812" 1.468" 0.177" 0133551 MPK 717.08
3/4" 0.812" 1.468" 0.177" 33174 EA 1.01
7/8" 0.921" 1.875" 0.250" Load Indicating 33302 EA 5.77
7/8" 0.921" 1.875" 0.250" Load Indicating Squirter® 0157605 EA 5.56
7/8" 0.937" 1.750" 0.177" 33175 EA 1.35
7/8" 0.937" 1.750" 0.177" 1133175 PKG 9.47
1" 1.052" 2.000" 0.270" Load Indicating 33303 EA 6.08
1" 1.052" 2.000" 0.270" Load Indicating Squirter® 0157606 EA 6.51
1" 1.063" 2.000" 0.177" 0133553 MPK 745.00
1" 1.063" 2.000" 0.177" 33176 EA 1.18
1-1/8" 1.183" 2.250" 0.270" Load Indicating Squirter® 0157607 EA 8.15
1-1/8" 1.188" 2.250" 0.177" 0156053 EA 2.19
1-1/8" 1.188" 2.250" 0.177" 33179 EA 4.01
1-1/4" 1.315" 2.500" 0.270" Load Indicating 33305 EA 11.96
1-1/4" 1.315" 2.500" 0.270" Load Indicating Squirter® 0157608 EA 9.13
1-1/4" 1.375" 2.500" 0.177" 0156055 EA 2.50
1-1/4" 1.375" 2.500" 0.177" 33177 EA 1.80
1-3/8" 1.500" 2.750" 0.177" 33194 EA 3.47
1-1/2" 1.577" 3.000" 0.270" Load Indicating 33307 EA 21.60
1-1/2" 1.577" 3.000" 0.270" Load Indicating Squirter® 0157609 EA 22.44
1-1/2" 1.625" 3.000" 0.177" 33178 EA 3.46
1-3/4" 1.875" 3.375" 0.284" 33196 EA 7.55
2" 2.125" 3.750" 0.230" 33199 EA 8.13
System of Measurement: Metric
System of Measurement: Metric
Also known as the SI system, this measurement system is used across the globe. It is based on multiples of ten and uses meters, centimeters, millimeters as its basic measurements.
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
M12 13mm 24mm 3.00mm 11509269 EA 0.93
M16 17mm 30mm 4.00mm 11508232 EA 2.36
M20 21mm 37mm 4.00mm 11508233 EA 3.92
M24 25mm 44mm 4.00mm 11506989 EA 3.84
Finish : Plain
Material : Steel
System of Measurement: Imperial (Inch)
System of Measurement: Imperial (Inch)
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
1/4" 0.281" 0.625" 0.091" Extra Thick 0161162 EA 0.21
5/16" 0.344" 0.687" 0.091" Extra Thick 0161163 EA 0.13
3/8" 0.406" 0.812" 0.109" Extra Thick 0161164 EA 0.31
7/16" 0.469" 0.921" 0.109" Extra Thick 0161165 EA 0.41
1/2" 0.527" 1.187" 0.188" Load Indicating 33290 EA 2.39
1/2" 0.531" 1.062" 0.177" 0133544 MPK 698.25
1/2" 0.531" 1.062" 0.177" 1133117 PKG 8.48
1/2" 0.531" 1.062" 0.177" 33117 EA 0.34
1/2" 0.531" 1.062" 0.312" Extra Thick 0161166 EA 1.16
9/16" 0.625" 1.188" 0.125" 33118 EA 0.53
5/8" 0.658" 1.375" 0.250" Load Indicating 33291 EA 2.36
5/8" 0.658" 1.375" 0.250" Load Indicating Squirter® 0157595 EA 2.65
5/8" 0.658" 1.375" 0.250" Load Indicating Squirter® 110157595 CS 83.00
5/8" 0.688" 1.312" 0.177" 33119 EA 0.45
5/8" 0.688" 1.312" 0.177" 1133119 PKG 4.53
5/8" 0.688" 1.312" 0.177" 0133545 MPK 597.12
5/8" 0.688" 1.312" 0.312" Extra Thick 0161168 EA 0.76
3/4" 0.790" 1.625" 0.230" Load Indicating 33310 EA 6.39
3/4" 0.790" 1.625" 0.240" Load Indicating 0157618 EA 4.70
3/4" 0.790" 1.625" 0.250" Load Indicating 33292 EA 3.18
3/4" 0.790" 1.625" 0.250" Load Indicating Squirter® 0157596 EA 3.23
3/4" 0.812" 1.468" 0.177" 0133546 MPK 618.52
3/4" 0.812" 1.468" 0.177" 1133120 PKG 7.74
3/4" 0.812" 1.468" 0.177" 33120 EA 0.61
3/4" 0.812" 1.468" 0.312" Extra Thick 0161169 EA 2.49
7/8" 0.921" 1.875" 0.240" Load Indicating 0157619 EA 3.40
7/8" 0.921" 1.875" 0.250" Load Indicating 33293 EA 4.02
7/8" 0.921" 1.875" 0.240" Load Indicating 33311 EA 5.59
7/8" 0.921" 1.875" 0.250" Load Indicating Squirter® 0157597 EA 4.39
7/8" 0.937" 1.750" 0.177" 33121 EA 0.81
7/8" 0.937" 1.750" 0.177" 1133121 PKG 8.06
7/8" 0.937" 1.750" 0.177" 0133547 MPK 590.69
1" 1.052" 2.000" 0.270" Load Indicating 0157620 EA 3.93
1" 1.052" 2.000" 0.270" Load Indicating 33294 EA 6.14
1" 1.052" 2.000" 0.270" Load Indicating 33312 EA 12.89
1" 1.063" 2.000" 0.177" 0133548 MPK 610.00
1" 1.063" 2.000" 0.177" 1133122 PKG 8.64
1" 1.063" 2.000" 0.177" 33122 EA 0.86
1" 1.063" 2.000" 0.312" Extra Thick 0161171 EA 3.70
1-1/8" 1.183" 2.250" 0.270" Load Indicating 0157621 EA 8.30
1-1/8" 1.183" 2.250" 0.270" Load Indicating 33295 EA 8.68
1-1/8" 1.183" 2.250" 0.270" Load Indicating 33313 EA 11.58
1-1/8" 1.188" 2.250" 0.177" 0156052 EA 2.09
1-1/8" 1.188" 2.250" 0.177" 33123 EA 2.39
1-1/4" 1.315" 2.500" 0.270" Load Indicating 33296 EA 16.65
1-1/4" 1.315" 2.500" 0.270" Load Indicating 33314 EA 10.89
1-1/4" 1.375" 2.500" 0.177" 33124 EA 2.63
1-1/4" 1.375" 2.500" 0.312" Extra Thick 0161173 EA 6.29
1-1/4" 1.688" 2.299" 0.193" Load Indicating 0157879 EA 11.35
1-3/8" 1.446" 2.750" 0.270" Load Indicating 33315 EA 18.69
1-3/8" 1.500" 2.750" 0.177" 33125 EA 2.66
1-1/2" 1.562" 3.000" 0.312" Extra Thick 0161174 EA 7.18
1-1/2" 1.577" 3.000" 0.270" Load Indicating 33298 EA 18.45
1-1/2" 1.577" 3.000" 0.270" Load Indicating 33316 EA 17.64
1-1/2" 1.577" 3.000" 0.270" Load Indicating Squirter® 0157601 EA 12.20
1-1/2" 1.625" 3.000" 0.177" 33126 EA 4.33
1-5/8" 1.750" 3.250" 0.188" 33127 EA 4.67
1-3/4" 1.875" 3.375" 0.284" 0156058 EA 3.88
1-3/4" 1.875" 3.375" 0.284" 33128 EA 4.63
1-7/8" 1.937" 3.468" 0.188" 33129 EA 11.51
2" 2.125" 3.750" 0.230" 0156060 EA 7.65
2" 2.125" 3.750" 0.230" 33130 EA 5.56
System of Measurement: Metric
System of Measurement: Metric
Also known as the SI system, this measurement system is used across the globe. It is based on multiples of ten and uses meters, centimeters, millimeters as its basic measurements.
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
M12 13mm 24mm 3.00mm 34880 EA 0.46
M14 15mm 27mm 1.60mm 34881 EA 0.90
M16 17mm 30mm 4.30mm 34882 EA 0.95
M20 21mm 37mm 4.30mm 34883 EA 1.31
M22 23mm 39mm 4.30mm 34884 EA 2.23
M24 25mm 44mm 4.30mm 34885 EA 2.08
M30 31mm 56mm 5.60mm 34886 EA 3.24
M36 37mm 66mm 5.60mm 34887 EA 5.68
Finish : Yellow Zinc
Material : Steel
System of Measurement: Imperial (Inch)
System of Measurement: Imperial (Inch)
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
1/4" 0.281" 0.625" 0.091" Extra Thick 0161175 EA 0.18
1/4" 0.281" 0.625" 0.095" SAE Extra Thick 11101302 EA 0.14
1/4" 0.281" 0.625" 0.095" SAE Extra Thick 11101302C PKG 3.50
1/4" 0.281" 0.625" 0.095" SAE Extra Thick 11128609 EA 0.44
5/16" 0.344" 0.687" 0.091" Extra Thick 0161176 EA 0.32
5/16" 0.344" 0.688" 0.095" SAE Extra Thick 11101303 EA 0.19
5/16" 0.344" 0.688" 0.095" SAE Extra Thick 11101303C PKG 3.50
5/16" 0.344" 0.688" 0.095" SAE Extra Thick 11128610 EA 0.69
3/8" 0.406" 0.812" 0.109" Extra Thick 0161177 EA 0.28
3/8" 0.406" 0.812" 0.125" SAE Extra Thick 11101304 EA 0.23
3/8" 0.406" 0.812" 0.125" SAE Extra Thick 11128611 EA 0.73
7/16" 0.469" 0.921" 0.109" 0161178 EA 0.46
7/16" 0.469" 0.922" 0.125" SAE Extra Thick 11128612 EA 1.04
1/2" 0.531" 1.062" 0.177" 0156024 EA 0.33
1/2" 0.531" 1.062" 0.312" Extra Thick 0161179 EA 1.25
1/2" 0.562" 1.062" 0.188" SAE Extra Thick 11101305 EA 0.57
1/2" 0.562" 1.062" 0.188" SAE Extra Thick 11101305C PKG 3.50
9/16" 0.625" 1.188" 0.312" 0161180 EA 3.49
5/8" 0.688" 1.312" 0.177" 0156027 EA 0.53
5/8" 0.688" 1.312" 0.195" SAE Extra Thick 11101376 EA 1.16
5/8" 0.688" 1.312" 0.312" 0161181 EA 2.10
3/4" 0.812" 1.468" 0.177" 0156030 EA 0.69
3/4" 0.812" 1.468" 0.312" Extra Thick 0161182 EA 2.36
3/4" 0.813" 1.469" 0.195" SAE Extra Thick 11101377 EA 1.07
7/8" 0.937" 1.750" 0.177" 0156033 EA 0.98
7/8" 0.937" 1.750" 0.312" Extra Thick 0161183 EA 4.75
1" 1.063" 2.000" 0.177" 0156036 EA 1.49
1" 1.063" 2.000" 0.312" 0161184 EA 4.80
1-1/8" 1.188" 2.250" 0.177" 0156039 EA 1.93
1-1/8" 1.188" 2.250" 0.312" 0161185 EA 6.25
1-1/4" 1.375" 2.500" 0.177" 0156042 EA 2.41
1-1/4" 1.375" 2.500" 0.312" Extra Thick 0161186 EA 6.65
1-1/2" 1.562" 3.000" 0.312" Extra Thick 0161187 EA 9.76
1-1/2" 1.625" 3.000" 0.177" 0156045 EA 4.40
1-3/4" 1.875" 3.375" 0.284" 0156048 EA 3.74
2" 2.125" 3.750" 0.230" 0156051 EA 10.62
System of Measurement: Metric
System of Measurement: Metric
Also known as the SI system, this measurement system is used across the globe. It is based on multiples of ten and uses meters, centimeters, millimeters as its basic measurements.
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
M20 27.70mm 38.09mm 3.60mm Load Indicating 0157921 EA 7.90
Finish : Zinc
Material : Steel
System of Measurement: Imperial (Inch)
System of Measurement: Imperial (Inch)
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
1/2" 0.531" 1.062" 0.177" 0156023 EA 0.30
1/2" 0.531" 1.062" 0.177" AW4520000ZB0000 EA 0.25
5/8" 0.688" 1.312" 0.177" 0156026 EA 0.58
5/8" 0.688" 1.313" 0.177" AW4600000ZB0000 EA 0.36
3/4" 0.812" 1.468" 0.177" 0156029 EA 0.76
7/8" 0.937" 1.750" 0.177" 0156032 EA 0.77
1" 1.063" 2.000" 0.177" 0156035 EA 1.36
1-1/8" 1.188" 2.250" 0.177" 0156038 EA 2.10
1-1/4" 1.375" 2.500" 0.177" 0156041 EA 2.65
1-1/2" 1.625" 3.000" 0.177" 0156044 EA 3.66
1-3/4" 1.875" 3.375" 0.284" 0156047 EA 7.24
System of Measurement: Metric
System of Measurement: Metric
Also known as the SI system, this measurement system is used across the globe. It is based on multiples of ten and uses meters, centimeters, millimeters as its basic measurements.
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
M16 22.5mm 31.16mm 3.20mm Load Indicating 0157902 EA 6.78
Finish : Hot Dip Galvanized
Material : Steel
System of Measurement: Imperial (Inch)
System of Measurement: Imperial (Inch)
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
1/2" 0.531" 1.062" 0.177" 0156022 EA 0.41
5/8" 0.688" 1.312" 0.177" 0156025 EA 0.67
3/4" 0.812" 1.468" 0.177" 0156028 EA 0.77
7/8" 0.937" 1.750" 0.177" 0156031 EA 1.56
1" 1.063" 2.000" 0.177" 0156034 EA 1.82
1-1/4" 1.375" 2.500" 0.177" 0156040 EA 2.83
1-1/2" 1.625" 3.000" 0.177" 0156043 EA 4.76
1-3/4" 1.875" 3.375" 0.284" 0156046 EA 6.83
2" 2.125" 3.750" 0.230" 0156049 EA 9.69
Finish : Mechanical Yellow Zinc
Material : Steel
System of Measurement: Imperial (Inch)
System of Measurement: Imperial (Inch)
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
Bolt Size Inner Diameter Outer Diameter Nominal Thickness Style SKU Pkg Qty Price
9/16" 0.641" 1.156" 0.340" SAE Extra Thick 11128614 EA 2.58
3/4" 0.829" 1.469" 0.340" SAE Extra Thick 11128616 EA 4.09
1" 1.095" 2.000" 0.340" SAE Extra Thick 11128618 EA 5.79
1-1/4" 1.375" 2.500" 0.340" SAE Extra Thick 11128620 EA 9.88
1-1/2" 1.625" 3.000" 0.340" SAE Extra Thick 11128622 EA 19.06