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    228 Products

    Heavy-Vibration-Resistant Spring Lock Washers

    Image of Product. Front orientation. Lock Washers. Spring Lock Washer, Conical Washer.
    With a grip that's second only to wedge lock, these washers stop nuts and screws from wiggling loose under constant, vigorous vibration. They are ideal for engines, turbines, generators, and other heavy duty equipment. Similar to a spring, they flatten under pressure to add tension between mating surfaces. As long as the washers aren't deformed or otherwise damaged, you can reuse them indefinitely without losing locking strength. Also known as conical washers and Belleville washers.
    Stack multiple washers in the same direction to double or triple how much weight they can bear. Stack washers in opposite directions for better deflection, which means they compress further and withstand more shock and movement without loosening.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Steel—Best for dry environments since moisture will cause these washers to rust.
    Top Serration—Adds friction for extra gripping power.
    For Screw
    Size
    ID
    OD
    Thk.
    Overall
    Ht.
    Serration
    Location
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    No. 6
    0.142"0.362"0.025" to 0.031"0.047"Top5090127A11100000
    No. 8
    0.161"0.402"0.036" to 0.042"0.059"Top1090127A1120000
    No. 10
    0.201"0.481"0.047" to 0.053"0.073"Top1090127A1130000
    1/4"
    0.254"0.559"0.049" to 0.055"0.087"Top5090127A1140000
    5/16"
    0.323"0.717"0.052" to 0.058"0.095"Top2590127A1150000
    3/8"
    0.402"0.877"0.059" to 0.065"0.108"Top2590127A1160000
    7/16"
    0.489"1.074"0.075" to 0.082"0.120"Top1090127A1170000
    5/8"
    0.646"1.273"0.095" to 0.101"0.156"Top590127A11800000
     
    Steel
    No. 6
    0.142"0.362"0.025" to 0.031"0.047"Top10090127A00700000
    No. 8
    0.161"0.402"0.036" to 0.042"0.059"Top10090127A00900000
    No. 10
    0.201"0.481"0.047" to 0.053"0.073"Top5090127A0110000
    1/4"
    0.254"0.559"0.049" to 0.055"0.087"Top5090127A0290000
    5/16"
    0.323"0.717"0.052" to 0.058"0.095"Top5090127A03000000
    3/8"
    0.402"0.877"0.059" to 0.065"0.108"Top2590127A03100000
    7/16"
    0.489"1.074"0.075" to 0.081"0.120"Top1090127A0320000
    1/2"
    0.512"1.074"0.075" to 0.081"0.120"Top1090127A0330000
    5/8"
    0.646"1.273"0.095" to 0.101"0.156"Top590127A0350000
     

    Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

    Image of Product. Front orientation. Lock Washers. Conical Washer, For Socket Head Screws, Spring Lock Washer.
    Stop socket head screws from wiggling loose on equipment with constant, vigorous vibration, such as engines, turbines, and generators. These washers have a small diameter to fit under screws with narrow heads. Similar to a spring, they flatten under pressure to add tension between mating surfaces. As long as the washers aren't deformed or otherwise damaged, you can reuse them indefinitely without losing locking strength. Also known as conical washers and Belleville washers.
    Stack multiple washers in the same direction to double or triple how much weight they can bear. Stack washers in opposite directions for better deflection, which means they compress further and withstand more shock and movement without loosening.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these washers won't rust when exposed to moisture. However, they can't hold up to the harsh chemicals that 316 stainless steel can.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Steel—Best for dry environments since moisture will cause these washers to rust.
    Top-and-Bottom Serration—Adds friction for extra gripping power.
    For Screw
    Size
    ID
    OD
    Thk.
    Overall
    Ht.
    Serration
    Location
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    No. 5, M3
    0.126"0.217"0.020"0.037"Top and Bottom5090895A005000000
    No. 6, M3.5
    0.146"0.236"0.028"0.045"Top and Bottom5090895A00700000
    No. 8, M4
    0.169"0.276"0.028"0.047"Top and Bottom5090895A00900000
    No. 10, M5
    0.209"0.354"0.028"0.047"Top and Bottom2590895A02700000
    1/4", M6
    0.264"0.374"0.028"0.047"Top and Bottom1090895A0290000
    5/16", M8
    0.331"0.512"0.039"0.063"Top and Bottom1090895A0300000
    3/8", M10
    0.413"0.630"0.039"0.063"Top and Bottom590895A0310000
    7/16", M11
    0.457"0.626"0.051"0.073"Top and Bottom590895A1110000
    1/2", M12
    0.539"0.748"0.051"0.073"Top and Bottom590895A03300000
    9/16", M14
    0.591"0.866"0.059"0.091"Top and Bottom190895A0370000
    5/8", M16
    0.669"0.945"0.059"0.091"Top and Bottom190895A0350000
    3/4", M19
    0.787"1.181"0.071"0.102"Top and Bottom190895A0360000
    7/8", M22
    0.906"1.299"0.071"0.118"Top and Bottom190895A1130000
    1", M25
    1.063"1.496"0.098"0.142"Top and Bottom190895A11400000
    1 1/8", M30
    1.244"1.772"0.098"0.161"Top and Bottom190895A11500000
    1 3/8", M36
    1.496"2.126"0.118"0.185"Top and Bottom190895A11600000
    M1.6
    0.067"0.126"0.020"0.030"Top and Bottom5090895A22200000
    M2
    0.087"0.157"0.014"0.024"Top and Bottom5090895A00100000
    M2.5
    0.106"0.189"0.018"0.035"Top and Bottom5090895A00300000
    M3
    0.126"0.217"0.018"0.035"Top and Bottom5090488A11000000
    M4
    0.169"0.278"0.020"0.039"Top and Bottom5090488A12000000
    M6
    0.252"0.394"0.024"0.047"Top and Bottom1090488A1300000
    M7
    0.291"0.472"0.028"0.051"Top and Bottom590895A22300000
    M8
    0.331"0.512"0.028"0.055"Top and Bottom1090488A14000000
    M10
    0.413"0.630"0.035"0.063"Top and Bottom590488A15000000
    M18
    0.748"1.063"0.059"0.091"Top and Bottom190895A0210000
    M20
    0.827"1.181"0.059"0.098"Top and Bottom190895A1120000
     
    Zinc-Plated Steel
    No. 4
    0.126"0.217"0.020"0.037"Top and Bottom10090895A12100000
    No. 5, M3
    0.126"0.217"0.018"0.035"Top and Bottom10090895A2020000
    No. 6, M3.5
    0.146"0.236"0.020"0.035"Top and Bottom10090895A20300000
    No. 8, M4
    0.169"0.276"0.020"0.039"Top and Bottom10090895A20400000
    No. 10, M5
    0.209"0.354"0.024"0.043"Top and Bottom10090895A20500000
    No. 12
    0.252"0.394"0.028"0.047"Top and Bottom5090895A12200000
    1/4", M6
    0.264"0.374"0.024"0.047"Top and Bottom5090895A20700000
    5/16", M8
    0.331"0.512"0.028"0.055"Top and Bottom5090895A20800000
    3/8", M10
    0.413"0.630"0.035"0.063"Top and Bottom2590895A2090000
    7/16", M11
    0.457"0.626"0.035"0.063"Top and Bottom2590895A2100000
    1/2", M12
    0.539"0.748"0.039"0.071"Top and Bottom2590895A2120000
    9/16", M14
    0.591"0.866"0.043"0.079"Top and Bottom2590895A21300000
    5/8", M16
    0.669"0.945"0.047"0.083"Top and Bottom2590895A21400000
    3/4", M19
    0.787"1.181"0.055"0.098"Top and Bottom1090895A21600000
    7/8", M22
    0.906"1.299"0.055"0.106"Top and Bottom590895A21800000
    1", M25
    1.063"1.496"0.071"0.122"Top and Bottom590895A21900000
    1 1/16", M27
    1.126"1.535"0.071"0.122"Top and Bottom590895A22400000
    1 1/8", M30
    1.244"1.772"0.071"0.142"Top and Bottom590895A22000000
    1 3/8", M36
    1.496"2.126"0.098"0.165"Top and Bottom190895A2210000
    M1.6
    0.067"0.126"0.014"0.024"Top and Bottom10090895A3110000
    M2
    0.087"0.157"0.014"0.024"Top and Bottom10090895A2000000
    M2.5
    0.106"0.189"0.018"0.035"Top and Bottom10090895A2010000
    M18
    0.748"1.063"0.055"0.091"Top and Bottom1090895A21500000
    M20
    0.827"1.181"0.055"0.098"Top and Bottom590895A21700000
    M24
    1.008"1.417"0.063"0.114"Top and Bottom590895A31200000
     
    Steel
    No. 5, M3
    0.126"0.217"0.018"0.035"Top and Bottom10093501A0050000
    No. 6, M3.5
    0.146"0.236"0.018"0.035"Top and Bottom10093501A0070000
    No. 8, M4
    0.169"0.276"0.020"0.039"Top and Bottom10093501A0090000
    No. 10, M5
    0.209"0.354"0.024"0.043"Top and Bottom10093501A0270000
    1/4", M6
    0.264"0.374"0.028"0.047"Top and Bottom10093501A02900000
    5/16", M8
    0.331"0.512"0.031"0.055"Top and Bottom10093501A03000000
    3/8", M10
    0.413"0.630"0.039"0.063"Top and Bottom10093501A03100000
    7/16", M11
    0.457"0.626"0.039"0.063"Top and Bottom10093501A03200000
    1/2", M12
    0.539"0.748"0.043"0.071"Top and Bottom5093501A03300000
    9/16", M14
    0.591"0.866"0.047"0.079"Top and Bottom5093501A03400000
    5/8", M16
    0.669"0.945"0.051"0.083"Top and Bottom5093501A03500000
    3/4", M19
    0.787"1.181"0.059"0.098"Top and Bottom2593501A03600000
    7/8", M22
    0.906"1.299"0.059"0.106"Top and Bottom2093501A03700000
    1", M25
    1.063"1.496"0.079"0.122"Top and Bottom1093501A03800000
    1 1/8", M30
    1.244"1.772"0.079"0.142"Top and Bottom593501A02300000
    1 3/8", M36
    1.496"2.126"0.098"0.165"Top and Bottom593501A04000000
    M1.6
    0.067"0.126"0.014"0.024"Top and Bottom10093501A1110000
    M2
    0.087"0.157"0.014"0.024"Top and Bottom10093501A0010000
    M2.5
    0.106"0.189"0.018"0.035"Top and Bottom10093501A0030000
    M6
    0.252"0.394"0.024"0.047"Top and Bottom10093501A11200000
    M12
    0.512"0.709"0.039"0.067"Top and Bottom5093501A11300000
    M18
    0.748"1.063"0.059"0.091"Top and Bottom1093501A0210000
    M20
    0.827"1.181"0.059"0.098"Top and Bottom1093501A02200000
    M24
    1.008"1.417"0.063"0.114"Top and Bottom593501A11400000
    M27
    1.126"1.535"0.071"0.122"Top and Bottom593501A11500000
     

    Extreme-Vibration-Resistant Wedge Lock Washers

    When it's critical to keep bolted assemblies secure, choose these two-piece lock washers with the tightest grip of all. They stop nuts and screws from loosening in heavy machinery that experiences jarring starts and stops, such as compressors and compactors. Serrations on the outside bite into the fastener and mating surfaces, while wedges on the inside lock the two pieces together. When the nut or screw starts to loosen, the wedges drive more tightly together to maintain tension. You can reuse these washers up to fifteen times, as long as the serrations and wedges are not worn down. They are comparable to NORD-LOCK® or Sherex TEC® washers.
    Wedge Lock
    Image of Product. Bottom orientation. Lock Washers. Wedge-Lock Washer.
    Super-Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these washers won't degrade when exposed to harsh weather, salt water, and most chemicals.
    Super-Corrosion-Resistant Black-Oxide 316 Stainless Steel—Combines a finished appearance with the rust resistance of 316 stainless steel. Even if the coating wears off, these washers will hold up in just about any environment, including salt water and most chemicals.
    Super-Corrosion-Resistant Zinc-Flake-Coated Steel—With 40 times the corrosion resistance of zinc-plated steel, these withstand rust as well as 316 stainless steel. They have been tested to extreme standards, including 1,000 hours of salt spray. They are similar to Magni-coated washers.
    Black Super-Corrosion-Resistant Zinc-Flake-Coated Steel—Typically chosen for their appearance, these washers have a dark, matte coating to create a finished look. With 40 times the corrosion resistance of zinc-plated steel, these withstand rust as well as 316 stainless steel. They have been tested to extreme standards, including 1,000 hours of salt spray. Similar to Magni-coated washers.
    For Screw
    Size
    ID
    OD
    Thk.
    Pkg.
    Qty.
    Pkg.
    Super-Corrosion-Resistant 316 Stainless Steel
    No. 5, M3
    0.130"0.280"0.080" to 0.100"591812A212000000
    No. 6, M3.5
    0.150"0.300"0.080" to 0.100"191812A3380000
    No. 6, M3.5
    0.150"0.350"0.080" to 0.100"191812A3930000
    No. 8, M4
    0.170"0.300"0.080" to 0.100"591812A21500000
    No. 8, M4
    0.170"0.350"0.080" to 0.100"591812A41500000
    No. 10, M5
    0.210"0.350"0.080" to 0.100"591812A22700000
    No. 10, M5
    0.210"0.430"0.080" to 0.100"591812A42700000
    1/4"
    0.280"0.450"0.080" to 0.100"591812A22900000
    1/4"
    0.280"0.530"0.080" to 0.100"591812A42900000
    5/16", M8
    0.340"0.530"0.070" to 0.090"591812A23000000
    5/16", M8
    0.340"0.650"0.070" to 0.090"591812A43000000
    3/8"
    0.410"0.650"0.070" to 0.090"591812A23100000
    3/8"
    0.410"0.830"0.070" to 0.090"191812A4310000
    7/16", M11
    0.450"0.730"0.080" to 0.100"191812A2320000
    1/2"
    0.530"0.770"0.070" to 0.090"191812A2330000
    1/2"
    0.530"1.000"0.120" to 0.140"191812A43300000
    9/16", M14
    0.600"0.910"0.110" to 0.130"191812A2140000
    9/16", M14
    0.600"1.210"0.120" to 0.140"191812A48600000
    5/8", M16
    0.670"1.000"0.110" to 0.130"191812A2350000
    5/8", M16
    0.670"1.210"0.120" to 0.140"191812A43500000
    3/4"
    0.790"1.210"0.120" to 0.140"191812A66400000
    3/4"
    0.790"1.540"0.120" to 0.140"191812A66900000
    7/8", M22
    0.920"1.360"0.120" to 0.140"191812A72700000
    7/8", M22
    0.920"1.650"0.120" to 0.140"191812A74400000
    1"
    1.100"1.540"0.120" to 0.140"191812A79800000
    1"
    1.100"1.910"0.120" to 0.140"191812A79900000
    1 1/8", M30
    1.240"1.850"0.260" to 0.280"191812A80800000
    1 1/8", M30
    1.240"2.300"0.260" to 0.280"191812A81500000
    1 1/4", M33
    1.350"1.910"0.260" to 0.280"191812A81900000
    1 3/8", M36
    1.470"2.170"0.260" to 0.280"191812A82200000
    1 1/2", M39
    1.590"2.300"0.260" to 0.280"191812A82300000
    3", M76
    3.110"4.330"0.340" to 0.360"191812A954000000
    M6
    0.260"0.430"0.080" to 0.100"191812A4230000
    M6
    0.260"0.530"0.070" to 0.090"191812A4540000
    M10
    0.420"0.650"0.070" to 0.090"191812A4660000
    M10
    0.420"0.830"0.070" to 0.090"191812A4680000
    M12
    0.510"0.770"0.070" to 0.090"191812A4740000
    M12
    0.510"1.000"0.110" to 0.130"191812A4790000
    M18
    0.770"1.140"0.120" to 0.140"191812A50600000
    M18
    0.770"1.360"0.120" to 0.140"191812A60900000
    M20
    0.840"1.210"0.110" to 0.130"191812A72400000
    M20
    0.840"1.540"0.120" to 0.140"191812A72500000
    M24
    1.000"1.540"0.120" to 0.140"191812A79000000
    M24
    1.000"1.910"0.120" to 0.140"191812A79600000
    M27
    1.120"1.650"0.260" to 0.280"191812A80000000
    M42
    1.700"2.480"0.460" to 0.480"191812A82900000
     
    Super-Corrosion-Resistant Black-Oxide 316 Stainless Steel
    No. 5, M3
    0.130"0.280"0.080" to 0.100"591812A2510000
    No. 8, M4
    0.170"0.300"0.080" to 0.100"591812A2520000
    No. 10, M5
    0.210"0.350"0.080" to 0.100"591812A2530000
    M6
    0.260"0.430"0.080" to 0.100"591812A2540000
    M8
    0.340"0.650"0.070" to 0.090"191812A1420000
    M10
    0.420"0.650"0.070" to 0.090"591812A25500000
    M12
    0.510"0.770"0.070" to 0.090"191812A2560000
    M16
    0.670"1.210"0.110" to 0.130"191812A14300000
     
    Super-Corrosion-Resistant Zinc-Flake-Coated Steel
    No. 5, M3
    0.130"0.280"0.060" to 0.080"2091074A11200000
    No. 6, M3.5
    0.150"0.300"0.060" to 0.080"2091074A10200000
    No. 6, M3.5
    0.150"0.350"0.060" to 0.080"2091074A14200000
    No. 8, M4
    0.170"0.300"0.060" to 0.080"2091074A11500000
    No. 8, M4
    0.170"0.350"0.060" to 0.080"2091074A31200000
    No. 10, M5
    0.210"0.350"0.060" to 0.080"2091074A12700000
    No. 10, M5
    0.210"0.430"0.060" to 0.080"2091074A32700000
    1/4"
    0.280"0.450"0.090" to 0.110"2091074A12900000
    1/4"
    0.280"0.530"0.090" to 0.110"2091074A32900000
    5/16", M8
    0.340"0.530"0.090" to 0.110"2091074A13000000
    5/16", M8
    0.340"0.650"0.090" to 0.110"2091074A33000000
    3/8"
    0.410"0.650"0.090" to 0.110"2091074A13100000
    3/8"
    0.410"0.830"0.090" to 0.110"1091074A33100000
    7/16", M11
    0.450"0.730"0.090" to 0.110"1091074A13200000
    1/2"
    0.530"0.770"0.090" to 0.110"1091074A13300000
    1/2"
    0.530"1.000"0.120" to 0.140"891074A33300000
    9/16", M14
    0.600"0.910"0.120" to 0.140"1091074A13400000
    9/16", M14
    0.600"1.210"0.120" to 0.140"491074A30500000
    5/8", M16
    0.670"1.000"0.120" to 0.140"891074A13500000
    5/8", M16
    0.670"1.210"0.120" to 0.140"491074A33500000
    3/4"
    0.790"1.210"0.120" to 0.140"491074A13600000
    3/4"
    0.790"1.540"0.120" to 0.140"291074A33600000
    7/8", M22
    0.920"1.360"0.120" to 0.140"291074A1370000
    7/8", M22
    0.920"1.650"0.170" to 0.190"291074A33700000
    1"
    1.100"1.540"0.120" to 0.140"291074A13800000
    1"
    1.100"1.910"0.170" to 0.190"191074A3380000
    1 1/8", M30
    1.240"1.850"0.220" to 0.240"191074A1400000
    1 1/8", M30
    1.240"2.300"0.250" to 0.270"191074A36000000
    1 1/4", M33
    1.350"1.910"0.220" to 0.240"191074A14500000
    1 3/8", M36
    1.470"2.170"0.250" to 0.270"191074A15000000
    1 1/2", M39
    1.590"2.300"0.250" to 0.270"191074A16000000
    1 3/4", M45
    1.820"2.760"0.270" to 0.290"191074A36700000
    1 7/8", M48
    1.950"2.950"0.270" to 0.290"191074A37000000
    2", M52
    2.110"3.150"0.270" to 0.290"191074A37100000
    2 1/4", M56
    2.330"3.350"0.270" to 0.290"191074A37400000
    2 1/2", M64
    2.640"3.740"0.270" to 0.290"191074A37800000
    M6
    0.260"0.430"0.060" to 0.080"2091074A15100000
    M6
    0.260"0.530"0.090" to 0.110"2091074A16900000
    M10
    0.420"0.650"0.090" to 0.110"2091074A18000000
    M10
    0.420"0.830"0.090" to 0.110"1091074A21100000
    M12
    0.510"0.770"0.090" to 0.110"1091074A22100000
    M12
    0.510"1.000"0.120" to 0.140"891074A28900000
    M18
    0.770"1.140"0.120" to 0.140"491074A30800000
    M18
    0.770"1.360"0.120" to 0.140"291074A3140000
    M20
    0.840"1.210"0.120" to 0.140"491074A32500000
    M20
    0.840"1.540"0.120" to 0.140"291074A32800000
    M24
    1.000"1.540"0.120" to 0.140"291074A34800000
    M24
    1.000"1.910"0.170" to 0.190"291074A35300000
    M27
    1.120"1.650"0.220" to 0.240"191074A3540000
    M27
    1.120"1.910"0.220" to 0.240"191074A35500000
    M42
    1.700"2.480"0.250" to 0.270"191074A36600000
     
    Black Super-Corrosion-Resistant Zinc-Flake-Coated Steel
    1/4"
    0.280"0.450"0.090" to 0.110"1097913A11200000
    1/4"
    0.280"0.530"0.090" to 0.110"1097913A12300000
    5/16", M8
    0.340"0.530"0.090" to 0.110"1097913A11300000
    3/8"
    0.410"0.650"0.090" to 0.110"1097913A11400000
    3/8"
    0.410"0.830"0.090" to 0.110"597913A12500000
    1/2"
    0.530"0.770"0.090" to 0.110"597913A1170000
    1/2"
    0.530"1.000"0.120" to 0.140"497913A12800000
    5/8", M16
    0.670"1.000"0.120" to 0.140"497913A11800000
    3/4"
    0.790"1.210"0.120" to 0.140"497913A11900000
    3/4"
    0.790"1.540"0.120" to 0.140"297913A1310000
    1"
    1.100"1.540"0.120" to 0.140"297913A1210000
    M6
    0.260"0.430"0.060" to 0.080"1097913A11100000
    M6
    0.260"0.530"0.090" to 0.110"1097913A12200000
    M8
    0.340"0.650"0.090" to 0.110"1097913A12400000
    M10
    0.420"0.650"0.090" to 0.110"1097913A11500000
    M10
    0.420"0.830"0.090" to 0.110"597913A12600000
    M12
    0.510"0.770"0.090" to 0.110"597913A1160000
    M12
    0.510"1.000"0.120" to 0.140"497913A12700000
    M16
    0.670"1.210"0.120" to 0.140"497913A12900000
     
    Spring/Wedge Lock
    Image of Product. Bottom orientation. Lock Washers. Wedge-Lock Washer.
    More flexible than standard wedge lock washers to withstand stronger shocks and vibration. They have a cone shape that expands and compresses to maintain tension in the joint, similar to a heavy duty spring.
    Super-Corrosion-Resistant Zinc-Flake-Coated Steel—With 40 times the corrosion resistance of zinc-plated steel, these withstand rust as well as 316 stainless steel. They have been tested to extreme standards, including 1,000 hours of salt spray. They are similar to Magni-coated washers.
    For Screw
    Size
    ID
    OD
    Thk.
    Pkg.
    Qty.
    Pkg.
    Super-Corrosion-Resistant Zinc-Flake-Coated Steel
    5/16", M8
    0.340"0.530"0.080" to 0.090"193281A10300000
    5/16", M8
    0.340"0.650"0.080" to 0.090"193281A1130000
    3/8"
    0.410"0.650"0.090" to 0.100"193281A1040000
    1/2"
    0.530"0.770"0.130" to 0.140"193281A1070000
    5/8", M16
    0.670"1.000"0.170" to 0.180"193281A1090000
    3/4"
    0.790"1.210"0.210" to 0.220"193281A1140000
    M6
    0.260"0.430"0.070" to 0.080"193281A1010000
    M10
    0.420"0.650"0.100" to 0.110"193281A1050000
    M12
    0.510"0.770"0.13"193281A1060000
    M20
    0.840"1.210"0.220" to 0.230"193281A1120000
     
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