Flat Washers

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Flat washers are used with threaded fasteners for distributing the load uniformly and reducing frictional losses during screw tightening. These units are used for providing spacing and...Read more

APPROVED VENDOR -

Plain Grade 18-8 Stainless Steel Oversized Flat Washers

StyleModelFits Bolt SizesInside Dia.Outside Dia.ThicknessThickness ToleranceTensile StrengthHardnessColorPrice (inc. VAT)Pkg. Qty.
AU51410.006.0001#00.063"1/8"0.016"----£24.5850
BU51410.007.0001#10.094"5/32"0.016"----£22.1350
CU51410.008.0001#20.094"3/16"1/32"----£21.7350
DU51410.011.0003#41/8"5/16"5/64"----£44.9950
EU51410.011.0001#41/8"1/4"0.063"----£78.5450
FZ0538-188#41/8"5/16"0.032"-0.004" to +0.005"90000 psiRockwell B80Silver£4.37100
GZ0539-188#65/32"3/8"0.032"-0.004" to +0.005"90000 psiRockwell B80Silver£17.68100
HU51530.013.0001#61/8"5/8"1/32"----£2.4150
IU51530.013.0002#65/32"9/16"0.047"----£11.4450
JU51410.013.0002#65/32"5/16"0.063"----£37.8850
KU51410.013.0004#65/32"3/8"5/64"----£39.1350
LZ0448-188#60.141"5/8"1/32"-0.004" to +0.005"90000 psiRockwell B80-£7.0350
MZ0449-188#65/32"9/16"0.047"-0.004" to +0.005"90000 psiRockwell B80-£13.3550
NU51410.016.0003#83/16"7/16"5/64"----£30.9950
OZ0540-188#80.172"3/8"0.032"-0.004" to +0.005"90000 psiRockwell B80Silver£4.50100
PZ0450-188#80.172"3/4"1/25"-0.004" to +0.005"90000 psiRockwell B80-£7.2250
QU51530.019.0002#83/16"11/16"0.047"----£3.9650
RU51410.016.0001#85/32"3/8"0.063"----£14.7850
SZ0451-188#83/16"3/4"0.05"-0.004" to +0.005"90000 psiRockwell B80-£16.5950
TZ0454-188#100.203"1"1/25"-0.004" to +0.005"90000 psiRockwell B80-£10.9050
UU51530.019.0001#103/16"1/2"0.047"-Not Applicable--£2.4450
VZ0541-188#100.203"7/16"0.032"-0.004" to +0.005"90000 psiRockwell B80Silver£20.51100
WZ0452-188#100.203"1/2"1/25"-0.004" to +0.005"90000 psiRockwell B80-£4.9450
XU51410.019.0001#103/16"1/2"0.094"----£4.6750
YZ0453-188#100.203"11/16"1/25"-0.004" to +0.005"90000 psiRockwell B80-£6.6150
APPROVED VENDOR -

Zinc Plated Steel USS Flat Washers

StyleModelFits Bolt SizesInside Dia.Outside Dia.ThicknessThickness ToleranceHardnessColorPrice (inc. VAT)Pkg. Qty.
AU38400.112.00011 1/8"1 1/4"2 3/4"0.156"---£6.045
B6DYW71 3/4"1 7/8"4"0.156"-0.03" to +0.03"Rockwell C38-£18.6910
CU38400.137.00021 3/8"1 1/2"3 1/4"0.156"---£7.135
D4RVU21/2"0.563"1 3/8"7/64"-0.025" to +0.025"Rockwell C38-£243.871
EU38400.025.00041/4"0.313"3/4"1/16"0.051" to 0.08"-Silver£4.18100
B6DYW82"2 1/8"4 1/2"0.156"-0.03" to +0.03"Rockwell C38-£19.388
F4RVX82"2 1/8"4 1/2"3/16"-0.03" to +0.03"Rockwell C38-£288.0880
GU38400.075.00043/4"0.813"2"0.156"---£11.5320
HU38130.037.00013/8"7/16"1"5/64"0.064" to 0.104"-Silver£7.24100
IU38400.018.00013/16"1/4"9/16"3/64"0.036" to 0.065"-Silver£2.45100
JU38130.031.00015/16"3/8"7/8"5/64"0.064" to 0.104"-Silver£5.20100
K4RVX25/16"3/8"7/8"5/64"-0.02" to +0.02"Rockwell C38-£249.444
LU38400.056.00029/16"5/8"1 1/2"0.109"---£5.2525
StyleModelInside Dia.Fits Bolt SizesThicknessWasher TypeMaterialFinish
AB450-3/8HDG7/16"3/8"-U WasherSteelHot Dip Galvanized
RFQ
AB450-1/2HDG9/16"-1/4"U WasherSteelHot Dip Galvanized
RFQ
StyleModelFits Bolt SizesInside Dia.Washer TypeMaterialFinish
ABFVFW1-1"Round WasherPVCPlain
RFQ
ABFVFW1/21/2"-Round WasherPVCPlain
RFQ
ABFVFW3/43/4"-Round WasherPVCPlain
RFQ
ABFVFW3/83/8"-Round WasherPVCPlain
RFQ
ABFVFW5/85/8"-Round WasherPVCPlain
RFQ
StyleModelFits Bolt SizesInside Dia.ThicknessWasher TypeMaterialFinish
AB450-3/8YZN3/8"7/16"-U WasherSteelYellow Zinc Plated
RFQ
AB450-5/8YZN5/8"11/16"1/4"U WasherSteelYellow Zinc Plated
RFQ
StyleModelInside Dia.Fits Bolt SizesThicknessWasher TypeMaterialGradeFinish
AB450-5/8GRN11/16"5/8"11 ga.U WasherSteelGrade 50Dura Green
RFQ
AB450-3/4GRN13/16"-11 ga.U WasherSteelGrade 50Dura Green
RFQ
StyleModelFits Bolt SizesInside Dia.ThicknessWasher TypeMaterialGradeFinish
AB450-1/4ZN1/4"5/16"11 ga.U WasherSteelGrade 50Zinc Plated
RFQ
AB450-3/8ZN3/8"7/16"11 ga.U WasherSteelGrade 50Zinc Plated
RFQ
AB450-5/8ZN5/8"11/16"11 ga.U WasherSteelGrade 50Zinc Plated
RFQ
StyleModelFits Bolt SizesInside Dia.ThicknessApplicationWasher TypeMaterialFinish
AB450-1/2ZN1/2"9/16"11 ga.Strut Fittings, BF-FTGS, UU WasherSteelZinc Plated
RFQ
AB450-3/4ZN3/4"13/16"11 ga.-U WasherSteelZinc Plated
RFQ
StyleModelInside Dia.Fits Bolt SizesThicknessWasher TypeMaterialGradeFinish
AB450-3/8SS47/16"3/8"1/4"U WasherSteel304Plain
RFQ
AB450-1/2SS49/16"--U WasherSteel304Plain
RFQ
StyleModelFits Bolt SizesInside Dia.ThicknessWasher TypeMaterialFinish
AB450-1/2GRN1/2"9/16"11 ga.U WasherSteelDura Green
RFQ
AB450-1/4GRN1/4"-11 ga.U WasherSteelDura Green
RFQ
AB450-3/8GRN3/8"7/16"11 ga.U WasherSteelDura Green
RFQ
StyleModelFits Bolt SizesInside Dia.ThicknessSquare WidthWasher TypeMaterialFinish
AC781-1/2-EG1/2"9/16"3/16"3"Square WasherSteelElectro Galvanized
RFQ
AC781-3/8EG3/8"7/16"3/16"3"Square WasherSteelElectro Galvanized
RFQ
AC781-5/8EG5/8"11/16"-3"Square WasherSteelElectro Galvanized
RFQ
StyleModelInside Dia.Fits Bolt SizesOutside Dia.ThicknessWasher TypeMaterial
AE147-1/2SS61/2"1/2"--Round WasherStainless Steel
RFQ
AE147-1/2-SS9/16"1/2"1 3/8"0.132"Round WasherStainless Steel
RFQ
SUPER-STRUT -

Electro Galvanized Steel Located Flat Washers

StyleModelFits Bolt SizesThicknessSquare WidthColorWasher TypeMaterialFinish
AAB241L-1/2EG1/2"1/2"1 9/16"-Located WasherSteelElectro Galvanized
RFQ
BAB241-1/2-GR1/2"1/4"1 1/2"GreenLocated WasherSteelElectro Galvanized
RFQ
AAB241L-3/8EG3/8"3/8"1 9/16"-Located WasherSteelElectro Galvanized
RFQ
CAB241L-5/8EG5/8"---Located WasherSteelElectro Galvanized
RFQ
DAB241-5/16GR5/16"1/8"--Located WasherSteelElectro Galvanized
RFQ
CAB241L-5/16EG5/16"---Located WasherSteelElectro Galvanized
RFQ
StyleModelColorFits Bolt SizesInside Dia.ThicknessSquare WidthWasher TypeMaterialFinish
AAB241-3/8-GRGreen3/8"9/16"3/16"1 1/2"Located WasherSteelUrethane Powder Coat
RFQ
AAB241-3/8-WHWhite3/8"9/16"3/16"1 1/2"Located WasherSteelUrethane Powder Coat
RFQ
StyleModelFits Bolt SizesThicknessInside Dia.Square WidthWasher TypeMaterialFinish
AAB241-1/2-HDG1/2"1/4"9/16"1 1/2"Located WasherSteelHot Dip Galvanized
RFQ
AAB241-3/8-HDG3/8"3/16"-1 1/2"Located WasherSteelHot Dip Galvanized
RFQ
COOPER B-LINE -

Zinc Plated Steel Flat Washers

StyleModelFits Bolt SizesInside Dia.Outside Dia.ThicknessWasher TypeMaterialFinish
A3/8X11/4FFWZN-3/8"1 1/4"-Flat WasherSteelZinc Plated
RFQ
BB3248-5/8 ZN----Flat WasherSteelZinc Plated
RFQ
A1/4X11/2FFWZN-1/4"1 1/2"-Flat WasherSteelZinc Plated
RFQ
A3/8X11/2FFWZN-3/8"1 1/2"-Flat WasherSteelZinc Plated
RFQ
CWASHER SPL KIT----Flat WasherSteelZinc Plated
RFQ
BB3248-1 ZN----Flat WasherSteelZinc Plated
RFQ
BB3248-3/8 ZN----Flat WasherSteelZinc Plated
RFQ
BB3248-7/8 ZN----Flat WasherSteelZinc Plated
RFQ
A1/2X2FFWZN-1/2"2"-Flat WasherSteelZinc Plated
RFQ
A1/4X11/4FFWZN-1/4"1 1/4"-Flat WasherSteelZinc Plated
RFQ
BB3248-3/4 ZN----Flat WasherSteelZinc Plated
RFQ
BB3248-1/2 ZN1/2"9/16"-1/4"Flat WasherSteelZinc Plated
RFQ
B1/4 FW YZN BOXED1/4"5/16"3/4"1/16"Flat WasherSteelZinc Plated
RFQ
FOREVERBOLT -

NL-19(SM) Grade 18-8 Stainless Steel Military Specification Flat Washers

StyleModelFits Bolt SizesInside Dia.Outside Dia.ThicknessThickness ToleranceHardnessColorPrice (inc. VAT)Pkg. Qty.
AFBFLWMS81P100#80.172"19/64"0.029" to 0.035"0.029" to 0.035"Rockwell B70Silver£58.88100
BFBFLWMS82P100#83/16"3/8"0.036" to 0.065"0.036" to 0.065"Rockwell B70Silver£64.60100
CFBFLWMS12P51/2"17/32"1 1/16"0.074" to 0.121"0.074" to 0.121"Rockwell B70Silver£7.135
DFBFLWMS14P501/4"9/32"5/8"0.051" to 0.08"0.051" to 0.08"Rockwell B70Silver£28.0250
EFBFLWMS38P253/8"13/32"13/16"0.051" to 0.08"0.051" to 0.08"Rockwell B70Silver£19.6725
FFBFLWMS58P55/8"21/32"1 5/16"0.074" to 0.121"0.074" to 0.121"Rockwell B70Silver£7.495
FOREVERBOLT -

NL-19(SM) Grade 18-8 Stainless Steel Standard Flat Washers

StyleModelFits Bolt SizesInside Dia.Outside Dia.ThicknessThickness ToleranceHardnessColorPrice (inc. VAT)Pkg. Qty.
AFBFLWASH6LOD2P100#65/32"3/8"2/41"0.036" to 0.065"Rockwell B70Silver£56.85100
BFBFLWASH8LOD2P50#83/16"7/16"2/41"0.036" to 0.065"Rockwell B70Silver£30.1750
CFBFLWASH8LOD2P100#83/16"7/16"2/41"0.036" to 0.065"Rockwell B70Silver£68.84100
DFBFLWASH10SODP100#100.203"7/16"0.032"-0.01" to +0.01"Rockwell B70Silver£60.28100
EFBFLWASH10LOD2P100#107/32"1/2"2/41"0.036" to 0.065"Rockwell B70Silver£64.00100
FFBFLWASH10LOD2P50#107/32"1/2"2/41"0.036" to 0.065"Rockwell B70Silver£39.3950
GFBFLWASHN12SODP100#121/4"9/16"5/77"0.051" to 0.08"Rockwell B70Silver£58.11100
HFBFLWASH1LOD2P101"1.063"2 1/2"16/97"0.136" to 0.192"Rockwell B70Silver£55.9610
IFBFEWASHT1221/2"17/32"2"1/8"-0.015" to +0.015"Rockwell B70Silver£8.191
JFBFLWASH12SODP1001/2"0.563"1 1/4"1/16"-0.005" to +0.005"Rockwell B70Silver£92.99100
KFBFLWASH12SOD2P101/2"17/32"1 1/16"0.074" to 0.121"0.074" to 0.121"Rockwell B70Silver£14.1910
LFBFLWASH12SODP251/2"0.563"1 1/4"1/16"-0.005" to +0.005"Rockwell B70Silver£28.8825
MFBFLWASH14SODP1001/4"9/32"5/8"0.045"-0.01" to +0.01"Rockwell B70Silver£49.55100
NFBFLWASH14SOD2P251/4"9/32"5/8"0.05"-0.01" to +0.01"Rockwell B70Silver£20.7125
OFBFEWASHT141121/4"9/32"1 1/2"1/8"-0.015" to +0.015"Rockwell B70Silver£5.121
PFBFLWASH14LOD2P501/4"0.313"3/4"0.051" to 0.08"0.051" to 0.08"Rockwell B70Silver£39.6050
QFBFLWASH14SOD2P1001/4"9/32"5/8"0.05"-0.01" to +0.01"Rockwell B70Silver£63.63100
RFBFLWASH14SODP501/4"9/32"5/8"0.045"-0.01" to +0.01"Rockwell B70Silver£36.6250
SFBFLWASH34SOD3P253/4"0.813"1 3/4"0.11"-0.01" to +0.01"Rockwell B70Silver£49.5625
TFBFLWASH34SOD23/4"0.813"1 1/2"0.108" to 0.16"0.108" to 0.16"Rockwell B70Silver£4.411
UFBFEWASHT341583/4"0.781"1 5/8"1/4"-0.01" to +0.01"Rockwell B70Silver£7.081
VFBFLWASH38SOD2P1003/8"0.391"7/8"0.05"-0.005" to +0.005"Rockwell B70Silver£60.84100
WFBFLWASH38LOD2P253/8"7/16"1"0.064" to 0.104"0.064" to 0.104"Rockwell B70Silver£24.6625
XFBFEWASHT3823/8"13/32"2"1/8"-0.015" to +0.015"Rockwell B70Silver£6.541
YFBFLWASH38SOD3P253/8"13/32"13/16"0.051" to 0.08"0.051" to 0.08"Rockwell B70Silver£19.7025
StyleModelFits Bolt SizesInside Dia.Square WidthThicknessWasher TypeMaterialFinish
AC781-1B1"-4"-Square WasherSteelBlack Oxide
RFQ
AC781-1/2B1/2"9/16"3"3/16"Square WasherSteelBlack Oxide
RFQ
AC781-3/4B3/4"13/16"--Square WasherSteelBlack Oxide
RFQ
AC781-3/8B3/8"7/16"3"3/16"Square WasherSteelBlack Oxide
RFQ
SUPER-STRUT -

Gold Galvanized Steel Round Flat Washers

StyleModelFits Bolt SizesInside Dia.Outside Dia.ThicknessWasher TypeMaterialFinish
AE147-1/21/2"9/16"1 3/8"0.132"Round WasherSteelGold Galvanized
RFQ
BEF147-1/21/2"9/16"2"-Round WasherSteelGold Galvanized
RFQ
AE147-1/41/4"---Round WasherSteelGold Galvanized
RFQ
BEF147-1/41/4"5/16"1 1/4"-Round WasherSteelGold Galvanized
RFQ
BEF147-3/83/8"13/32"1 1/2"2/25"Round WasherSteelGold Galvanized
RFQ
CZE147-3/8EG3/8"3/8"-0.104"Round WasherSteelGold Galvanized
RFQ
MASTER PRODUCTS -

Yellow Zinc Plated Steel USS Flat Washers

StyleModelFits Bolt SizesInside Dia.Outside Dia.ThicknessThickness ToleranceHardnessColorTemp. RangePrice (inc. VAT)Pkg. Qty.
AU38131.150.00011 1/2"1 5/8"3 1/2"0.156"--Yellow-58°F to +302°F£12.645
B513161G1 1/2"1 5/8"3 1/2"0.156"-0.027" to +0.033"Rockwell C38--£12.905
AU38131.125.00011 1/4"1 3/8"3"0.156"--Yellow-58°F to +302°F£8.705
B513141G1 1/4"1 3/8"3"0.156"-0.029" to +0.027"Rockwell C38--£8.955
BHU-1250USSHZYBAGGR1 1/4"1 3/8"3"0.136" to 0.192"-Rockwell C38-C45Yellow-£13.545
AU38131.112.00011 1/8"1 1/4"2 3/4"0.156"--Yellow-58°F to +302°F£8.325
B513131G1 1/8"1 1/4"2 3/4"0.156"-0.029" to +0.027"Rockwell C38--£10.145
BHU-1125USSHZYBAGGR1 1/8"1 1/4"2 3/4"0.136" to 0.192"-Rockwell C38-C45Yellow-£15.875
AU38131.137.00011 3/8"1 1/2"3 1/4"0.156"--Yellow-58°F to +302°F£11.495
AU38131.100.00011"1.063"2 1/2"0.156"--Yellow-58°F to +302°F£8.905
B513121G1"1.063"2 1/2"0.156"-0.029" to +0.027"Rockwell C38--£14.9110
BHU-1000USSHZYBAGGR1"1.063"2 1/2"0.136" to 0.192"-Rockwell C38-C45Yellow-£21.4510
CHU-1000USSHZYB1"1.063"2 1/2"0.156"-0.028" to +0.028"Rockwell C38-C45Yellow-£490.33300
B513061G1/2"0.563"1 3/8"0.109"-0.023" to +0.023"Rockwell C38--£7.7725
BHU-0500USSHZYBAGGR1/2"0.563"1 3/8"0.086" to 0.132"-Rockwell C38-C45Yellow-£7.2625
DHU-0500USSHZYB1/2"0.563"1 3/8"0.109"-0.023" to +0.023"Rockwell C38-C45Yellow-£259.491
AU38131.050.00011/2"0.563"1 3/8"0.109"--Yellow-58°F to +302°F£13.3650
AU38131.025.00011/4"0.313"47/64"0.065"--Yellow-58°F to +302°F£7.11100
B513021G1/4"0.313"3/4"0.065"-0.014" to +0.015"Rockwell C38--£7.70100
AU38131.075.00013/4"0.813"2"0.156"--Yellow-58°F to +302°F£15.0720
B513101G3/4"0.813"2"0.156"-0.026" to +0.029"Rockwell C38--£19.5820
EHU-0375USSHZYB3/8"7/16"1"0.084"-0.02" to +0.02"Rockwell C38-C45Yellow-£260.263
B513041G3/8"7/16"1"0.083"-0.019" to +0.021"Rockwell C38--£6.9050
AU38131.037.00013/8"7/16"1"0.083"--Yellow-58°F to +302°F£11.03100
BHU-0375USSHZYBAGGR3/8"7/16"1"0.064" to 0.104"-Rockwell C38-C45Yellow-£10.3950
12...1516

Flat Washers

Flat washers are used with threaded fasteners for distributing the load uniformly and reducing frictional losses during screw tightening. These units are used for providing spacing and electrical insulation in control boxes. Raptor Supplies offers a wide array of flat washers from Accurate Mfd Products, Apollo, Armor Coat, C. Sherman Johnson, Dynaform, Earnest, Fabory, Foreverbolt, Grainger, Master Products, Metric Blue, TE-CO and Micro Plastics.

Frequently Asked Questions

What is the difference between flat washers and lock washers?

  • Flat washers are ideal for increasing surface area and distributing the applied force when tightening a fastener. They can be used on the fastener's bolt & nut sides, or used as spacers when using a bolt may not be appropriate.
  • Lock washers produce tension during tightening to control the loosening of nuts. They are commonly used on the fastener's nut side for applications involving vibrations.

How to install a flat washer?

  • Place the flat washer between the threaded fastener (like a nut) and the screw / bolt head.
  • Make sure that the washer presses against the fastener & other adjacent surfaces to form a tight connection. Press the fastener down to lock the grooves of a serrated washer with the grooves of the nut.
  • Use a wrench or ratchet to tighten the nut / threaded fastener.
  • Ensure that the teeth of a serrated washer are covered completely by the nut / fastener head, or that a split washer is slightly out of alignment. This indicates tension on the threaded fastener. Users may loosen the nut / threaded fastener to adjust the washer if it is not operating correctly.

How to remove a flat washer?

  • Simply remove the nut / threaded fastener that is holding the washer in place using a vice-grip or pipe wrench.
  • Use a flat screwdriver to pry a lock washer off. When removing a split washer, the screwdriver head should be placed inside the split or beneath the washer and pushed. When removing a washer having teeth, the screwdriver head should be placed under a tooth and pushed up, repeating the procedure with more teeth if required. For other flat washer types, the screwdriver head can be placed below the washer and pushed up. The washer may break during removal, depending on the amount of pressure being applied.
  • If the flat washer does not budge, use penetrating oil and repeat the previous step.
  • Some flat washers can be used multiple times easily. Other washers (split lock) can be used only 1 or 2 times. Users should not reuse a split flat washer or other damaged washers. Do not use old washers in high-stress joint applications.

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