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Tooth Lock Washers , 300 Stainless (A1,A2, 18-8,304,310 etc.) (ASME B18. 21.1)

Tooth Lock Washers are often used with machine screws in electrical applications, and are usually smaller diameter An Internal Tooth Lock Washer has teeth around the center hole, while an External Tooth Lock Washer has teeth around the outside. Sometimes tooth lock washers can be concave, and have both internal and external teeth. Larger diameter External Tooth Lock washers are often used to lock nuts onto shafting. In this case the external tabs are bent up to lock the nut in place.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#2#2 ext tooth lockwashers stainless steel b18.21.128305
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8#8 internal/external tooth lock washer 18.8 ss b18.21.1868
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6#6 external tooth lockwasher 18.8 stainless steel b18.21.117195
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 ext tooth lockwashers stainless steel b18.21.1 27274
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10#10 ext tooth lockwasher stainless steel b18.21.1 16060
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8#8 ext tooth lockwashers stainless steel b18.21.1 41734
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated1/41/4 external tooth lockwasher stainless steel passivated b18.21.1150
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 ext tooth lockwashers s/s b18.21.11474
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6#6 int tooth lockwashers stainless steel b18.21.1 19000
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 int tooth lockwashers stainless steel b18.21.1 7885
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4#4 int tooth lockwashers stainless steel passivated b18.21.12200
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/41/4 int tooth lockwasher stainless steel b18.21.1840
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10#10 int tooth lockwasher 18.8 stainless steel b18.21.11830
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8#8 int tooth lockwashers stainless steel b18.21.17295
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Irwin IndOntTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#12#12 internal tooth lock washer stainless steel b18.21.1750
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GLFOHTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10#10 internal tooth lock 18-8 s/s b18.21.1 () () ()150
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GLFOHTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 internal tooth lock 300 s/s b18.21.1 () () ()1767
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GLFOHTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6#6 external tooth lock 18-8 s/s b18.21.1 () () ()585
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GLFOHTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4internal lock 304ss MS35333-153 b18.21.1 () () ()3700
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ASMCILTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 ext tooth lockwasher ss18-8 b18.21.13,705
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Alma BoltMITooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/41/4 st. st. internal star washer b18.21.12292
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated3.708 x 7.950 x 0.483washer external tooth s/s passivated3.708 x 7.950 x 0.483 mm # 60.146 x 0.313 x 0.019 in 12 teeth b18.21.175
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#63.708 x 7.950 x 0.483washer external tooth s/s passivated #63.708 x 7.950 x 0.483 mm 8 teeth0.146 x 0.313 x 0.019 in b18.21.15930
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated3.023 x 6.426 x 0.432washer external tooth s/s passivated3.023 x 6.426 x 0.432 mm # 40.119 x 0.253 x 0.017 in 8 teeth b18.21.118900
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated3.200 x 6.350 x 0.432washer external tooth s/s passivated3.200 x 6.350 x 0.432 mm #40.126 x 0.250 x 0.017 in b18.21.14918
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated3.200 x 6.350 x 0.432washer external tooth s/s passivated3.200 x 6.350 x 0.432 mm #40.126 x 0.250 x 0.017 in 8 teeth b18.21.176583
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Black Oxide4.369 x 9.474 x 0.533washer external tooth s/s black oxide4.369 x 9.474 x 0.533 mm #80.172 x 0.373 x 0.021 in 12 teeth b18.21.1128
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated16.500 x 26.000 x 1.200washer external tooth s/s passivated16.500 x 26.000 x 1.200 mm # 160.650 x 1.024 x 0.047 in b18.21.1156
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated9.800 x 17.500 x 0.900washer external tooth s/s passivated9.800 x 17.500 x 0.900 mm # 3/80.386 x 0.689 x 0.035 in 12 teeth b18.21.176
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated13.000 x 22.500 x 1.000washer external tooth s/s passivated13.000 x 22.500 x 1.000 mm # 1/20.512 x 0.886 x 0.039 in 12 teeth b18.21.181
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated2.800 x 5.800 x 0.30washer external tooth s/s passivated2.800 x 5.800 x 0.30 mm m 2.60.110 x 0.228 x 0.012 in 8 teeth b18.21.1295082
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated4.800 x 9.500 x 0.500washer external tooth s/s passivated4.800 x 9.500 x 0.500 mm # 4.50.189 x 0.374 x 0.020 in 9 teeth b18.21.1101
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated4washer external tooth s/s passivated4.300 x 8.500 x 0.450 mm0.169 x 0.335 x 0.018 in b18.21.1160
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivatedwasher external tooth s/s passsivated3.700 x 7.500 x 0.450 mm m 3.50.146 x 0.295 x 0.018 in 8 teeth b18.21.116226
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated10.500 x 18.000 x 0.900washer external tooth s/s passivated10.500 x 18.000 x 0.900 mm # 100.413 x 0.709 x 0.035 in 12 teeth b18.21.181
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated12.500 x 21.000 x 1.000washer external tooth s/s passivated12.500 x 21.000 x 1.000 mm # 120.492 x 0.827 x 0.039 in 12 teeth b18.21.166
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated14.500 x 23.000 x 1.000washer external tooth s/s passivated14.500 x 23.000 x 1.000 mm # 140.571 x 0.906 x 0.039 in 12 teeth b18.21.166
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated26.000 x 41.000 x 1.600washer internal tooth s/s passivated26.000 x 41.000 x 1.600 mm # 11.024 x 1.614 x 0.063 in 14 teeth b18.21.168
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#2washer internal tooth lock #2 s/s pass2.337 x 4.775 x 0.330 mm0.092 x 0.188 x 0.013 in b18.21.131489
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Zinc/Clear2.337 x 4.775 x 0.330washer internal tooth steel blue zinc2.337 x 4.775 x 0.330 mm # 20.092 x 0.188 x 0.013 in 7 teeth b18.21.1581260
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EximS'poreTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated2.692 x 5.690 x 0.406washer internal tooth s/s passivated2.692 x 5.690 x 0.406 mm # 30.106 x 0.224 x 0.016 in 7 teeth b18.21.14124
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/83/8 internal tth l/w 18-8 ss 31-INT-37 b18.21.1821
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/41/4 external tth l/w 18-8 ss 31-EXT-25 b18.21.16134
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/41/4 external tooth l/w 18-8 s/s b18.21.1400
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/41/4 external tooth l/w 18-8 s/s b18.21.11350
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Zinc/Clear3/8 x 963/8 external tooth lock zinc (96 hrs sst white rust) rohs b18.21.1110000
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#3#3 internal tooth l/w 18-8 s/s b18.21.11028
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 external tooth lock washr sst 18-8 b18.21.1500
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 external tooth lock washr sst 18-8 b18.21.19961
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6#6 internal tooth l/w 18-8 s/s b18.21.1900
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/21/2 external tooth lock 18-8 s/s steel b18.21.1300
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OSSCORITooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#12#12 external tooth l/w 18-8 304 b18.21.161
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OSSCORITooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6#6 external tooth l/w 18-8 304 b18.21.11,400
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OSSCORITooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6#6 internal tooth l/w 18-8 304 b18.21.1585
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OSSCORITooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8#8 internal tooth l/w 18-8 304 b18.21.1300
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OSSCORITooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 external tooth l/w 18-8 304 b18.21.11,000
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OSSCORITooth Lock Washer (Int. & Ext.)300 Sta inless (A1,A2, 18-8,304,310 etc.)Plain1/21/2 external tooth l/w 18-8 304 b18.21.1103
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OSSCORITooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/21/2 internal tooth l/w 18-8 304 b18.21.126
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10#10 internal tooth l/w 18-8 s/s b18.21.17780
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10#10 external tooth l/w 18-8 s/s b18.21.18830
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 internal tooth lock washer ss b18.21.1702
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6#6 external tooth l/w 18-8 s/s b18.21.12964
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8#8 internal tooth lockwasher 18-8 b18.21.156950
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QFCTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8#8 external tooth l/w 18-8 s/s b18.21.11165
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10#10 internal star lock washer stainless steel 400 b18.21.12160
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8washer lock 3/8 stainless steel400 external star b18.21.11200
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6washer lock #6 stainless steel400 external star b18.21.1315
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2washer lock 1/2 stainless steel 400 external star b18.21.1100
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8washer lock #8 stainless steel400 external star b18.21.1780
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10whr lok #10 ss400 extlstar csk rohs compliant per ms35336 b18.21.11500
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plainwhr lok #12 ss400 extlstar rohs compliant asme b18.21.1 b18.21.1787
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plainwhr lok #3 ss400 intlstar rohs compliant asme b18.21.1 b18.21.12135
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10#no lot trace (see daj) [82deg csk???] not rohs per ms35336 b18.21.12090
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JET FITTINGCATooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain7/16washer lock 7/16 stainless steel400 internal star b18.21.155
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THRDFASTTNTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4external tooth l/w 18-8 ss b18.21.14,000
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THRDFASTALTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/218-8 ss internal tooth l/w b18.21.120
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THRDFASTALTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/418-8 ss internal tooth l/w b18.21.150
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THRDFASTALTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/1618-8 ss internal tooth l/w b18.21.150
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THRDFASTOKTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#618-8 ss internal tooth l/w b18.21.1300
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THRDFASTALTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/818-8 ss internal tooth l/w b18.21.150
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All SizeTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/21/2 ext. tooth lock washer s/s b18.21.1300
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All SizeTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/41/4 ext. tooth lock washer s/s b18.21.11,493
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All SizeTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 ext. tooth lock washer s/s b18.21.11,682
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All SizeTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain7/167/16 ext. tooth lock washer s/s b18.21.1966
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All SizeTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#12#12 ext. tooth lock washer s/s b18.21.12,373
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All SizeTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8#8 ext. tooth lock washer s/s b18.21.11,576
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All SizeTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/83/8 int. tooth lock washer s/s b18.21.11,618
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All SizeTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain7/167/16 int. tooth lock washer s/s b18.21.1688
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All SizeTXTooth Lock Washer (Int. & Ext.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#12#12 int. tooth lock washer s/s b18.21.12,975
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