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Castle Nuts

Great for both general purpose fastening and for locking. Just insert a cotter pin or safety wire through the slots and a drilled hole in the fastener.


System of Measurement : Imperial (Inch)
Thread : Coarse
Material : Stainless Steel
Finish: Plain
Finish: Plain
Nothing has been done to this bare metal surface to improve appearance or corrosion resistance, which is very low if the material is steel. Often the surface has been oiled which improves lubricity. This finish is susceptible to rusting and corrosion in exterior environments. This most basic finish can be used when protection is not an issue or indoors.
Dia/Thread Size SKU Pkg Qty Price
Dia/Thread Size SKU Pkg Qty Price
1/4"-20 0172500 EA 4.91
5/16"-18 0172502 EA 9.08
3/8"-16 0172504 EA 5.15
1/2"-13 0172506 EA 12.41
5/8"-11 0172508 EA 15.59
3/4"-10 0172510 EA 29.92
7/8"-9 0172512 EA 78.30
1"-8 0172513 EA 30.02
1-1/4"-7 0172514 EA 230.69
1-1/2"-6 0172515 EA 241.03
System of Measurement : Imperial (Inch)
Thread : Fine
Material : Stainless Steel
Finish: Plain
Finish: Plain
Nothing has been done to this bare metal surface to improve appearance or corrosion resistance, which is very low if the material is steel. Often the surface has been oiled which improves lubricity. This finish is susceptible to rusting and corrosion in exterior environments. This most basic finish can be used when protection is not an issue or indoors.
Dia/Thread Size SKU Pkg Qty Price
Dia/Thread Size SKU Pkg Qty Price
#10-32 0172499 EA 8.06
1/4"-28 0172501 EA 10.38
3/8"-24 0172505 EA 9.83
1/2"-20 0172507 EA 8.49
5/8"-18 0172509 EA 22.06
3/4"-16 0172511 EA 32.38
System of Measurement : Imperial (Inch)
Thread : Coarse
Material : Steel
Finish: Zinc
Finish: Zinc
This finish, also know as zinc plating, zinc chromate or dichromate provides good corrosion resistance and is the standard for many hardware fasteners. It is an electroplated zinc layer covered with a chromate post-treatment. The zinc protects the steel from corrosion and the chromate layer protects the zinc from degrading. It is a popular finish because of its protection, value, and ease of coating. Slightly less corrosion resistant than yellow zinc, it is a versatile finish that is best used indoors. This finish should not be used in marine or high salt spray environments.
Dia/Thread Size SKU Pkg Qty Price
Dia/Thread Size SKU Pkg Qty Price
1/4"-20 0148090 CS 4640.00
3/8"-16 0148094 CS 276.00
1/2"-13 0148098 EA 2.37
9/16"-12 0148100 CS 740.00
5/8"-11 0148102 EA 4.51
3/4"-10 0148104 EA 7.53
7/8"-9 0148106 CS 459.00
1"-8 0148087 CS 653.00
1-1/4"-7 0148089 CS 644.20
System of Measurement : Imperial (Inch)
Thread : Fine
Material : Steel
Finish: Plain
Finish: Plain
Nothing has been done to this bare metal surface to improve appearance or corrosion resistance, which is very low if the material is steel. Often the surface has been oiled which improves lubricity. This finish is susceptible to rusting and corrosion in exterior environments. This most basic finish can be used when protection is not an issue or indoors.
Dia/Thread Size SKU Pkg Qty Price
Dia/Thread Size SKU Pkg Qty Price
1/4"-28 0169103 EA 2.37
5/16"-24 0169104 EA 2.67
3/8"-24 0169105 EA 2.23
7/16"-20 0169106 EA 1.72
1/2"-20 0169107 EA 3.42
9/16"-18 0169108 EA 4.64
5/8"-18 0169109 EA 5.02
3/4"-16 0169110 EA 6.57
7/8"-14 0169111 EA 11.71
1"-12 0169112 EA 17.75
1"-14 0169113 EA 10.44
1-1/8"-12 0169114 EA 19.68
1-1/4"-12 0169115 EA 34.65
1-3/8"-12 0169116 EA 47.99
1-1/2"-12 0169117 EA 36.72
Finish: Yellow Zinc
Finish: Yellow Zinc
This iridescent electroplated zinc finish, also known as Yellow Zinc Chromate or Dichromate, provides very good corrosion resistance and protection against rust. This finish should not be used in marine or high salt spray environments.
Dia/Thread Size SKU Pkg Qty Price
Dia/Thread Size SKU Pkg Qty Price
7/16"-20 0169127 EA 2.16
1/2"-20 0169128 EA 3.84
5/8"-18 0169129 EA 4.61
7/8"-14 0169131 EA 9.95
1"-14 0169132 EA 17.82
Finish: Zinc
Finish: Zinc
This finish, also know as zinc plating, zinc chromate or dichromate provides good corrosion resistance and is the standard for many hardware fasteners. It is an electroplated zinc layer covered with a chromate post-treatment. The zinc protects the steel from corrosion and the chromate layer protects the zinc from degrading. It is a popular finish because of its protection, value, and ease of coating. Slightly less corrosion resistant than yellow zinc, it is a versatile finish that is best used indoors. This finish should not be used in marine or high salt spray environments.
Dia/Thread Size SKU Pkg Qty Price
Dia/Thread Size SKU Pkg Qty Price
1/4"-28 0148091 EA 5.49
5/16"-24 0148093 EA 1.85
3/8"-24 0148095 EA 1.62
7/16"-20 0148097 EA 1.59
1/2"-20 0148099 EA 1.56
5/8"-18 0148103 EA 7.04
3/4"-16 0148105 EA 3.74
7/8"-14 0148107 EA 9.12
1"-12 0169121 EA 18.80
1"-14 0148088 EA 16.14
1-1/8"-12 0169122 EA 21.47
1-1/4"-12 0169123 EA 35.74
1-3/8"-12 0169124 EA 34.16
1-1/2"-12 0169125 EA 50.41
System of Measurement : Metric
Thread : Coarse
Material : Steel
Finish: Plain
Finish: Plain
Nothing has been done to this bare metal surface to improve appearance or corrosion resistance, which is very low if the material is steel. Often the surface has been oiled which improves lubricity. This finish is susceptible to rusting and corrosion in exterior environments. This most basic finish can be used when protection is not an issue or indoors.
Dia/Thread Size SKU Pkg Qty Price
Dia/Thread Size SKU Pkg Qty Price
M20-2.5 KJ2750000PF0000 PKG 204.00
M24-3.0 11551251 EA 0.00
Finish: Yellow Zinc
Finish: Yellow Zinc
This iridescent electroplated zinc finish, also known as Yellow Zinc Chromate or Dichromate, provides very good corrosion resistance and protection against rust. This finish should not be used in marine or high salt spray environments.
Dia/Thread Size SKU Pkg Qty Price
Dia/Thread Size SKU Pkg Qty Price
M20-2.5 M52750000YZ0000 EA 14.81
Finish: Zinc
Finish: Zinc
This finish, also know as zinc plating, zinc chromate or dichromate provides good corrosion resistance and is the standard for many hardware fasteners. It is an electroplated zinc layer covered with a chromate post-treatment. The zinc protects the steel from corrosion and the chromate layer protects the zinc from degrading. It is a popular finish because of its protection, value, and ease of coating. Slightly less corrosion resistant than yellow zinc, it is a versatile finish that is best used indoors. This finish should not be used in marine or high salt spray environments.
Dia/Thread Size SKU Pkg Qty Price
Dia/Thread Size SKU Pkg Qty Price
M12-1.75 90692 EA 4.94
M14-2.0 11507055 EA 2.95
M16-2.0 11507057 EA 1.53
M16-2.0 90693 EA 5.54
M18-2.5 11507060 EA 15.95
M20-2.5 11507062 EA 6.72
M20-2.5 90694 EA 7.58
M24-3.0 90695 EA 16.33
M30-3.5 90696 EA 21.22
M36-4.0 90697 EA 12.39
M42-4.5 90698 EA 81.08
M48-5.0 90699 EA 203.25
System of Measurement : Metric
Thread : Fine
Material : Steel
Finish: Zinc
Finish: Zinc
This finish, also know as zinc plating, zinc chromate or dichromate provides good corrosion resistance and is the standard for many hardware fasteners. It is an electroplated zinc layer covered with a chromate post-treatment. The zinc protects the steel from corrosion and the chromate layer protects the zinc from degrading. It is a popular finish because of its protection, value, and ease of coating. Slightly less corrosion resistant than yellow zinc, it is a versatile finish that is best used indoors. This finish should not be used in marine or high salt spray environments.
Dia/Thread Size SKU Pkg Qty Price
Dia/Thread Size SKU Pkg Qty Price
M8-1.0 11551249 EA 2.52
M12-1.5 11508292 EA 2.33
M14-1.5 11507056 EA 2.83
M16-1.5 11507058 EA 2.03
M18-1.5 11507061 EA 3.56
M20-1.5 11507063 EA 1.51
M22-1.5 11507064 EA 3.36
M24-1.5 11505628 EA 7.19
M24-2.0 11505627 EA 4.68
M27-1.5 11505629 EA 8.32
M30-1.5 11505631 EA 12.09
M30-2.0 11505630 EA 7.43