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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 4.68
5/16"-18 0172502 EA Call for Price
3/8"-16 0172504 EA 4.90
1/2"-13 0172506 EA 11.82
5/8"-11 0172508 EA Call for Price
3/4"-10 0172510 EA 28.49
7/8"-9 0172512 EA Call for Price
1"-8 0172513 EA 28.60
1-1/4"-7 0172514 EA 219.71
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 Call for Price
1/4"-28 0172501 EA Call for Price
3/8"-24 0172505 EA 9.36
1/2"-20 0172507 EA 8.09
5/8"-18 0172509 EA 21.01
3/4"-16 0172511 EA 30.84
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 Call for Price
1/2"-13 0148098 EA 2.26
9/16"-12 0148100 CS 705.00
5/8"-11 0148102 EA 4.29
3/4"-10 0148104 EA 7.17
7/8"-9 0148106 CS Call for Price
1"-8 0148087 CS Call for Price
1-1/4"-7 0148089 CS Call for Price
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 Call for Price
5/16"-24 0169104 EA Call for Price
3/8"-24 0169105 EA Call for Price
7/16"-20 0169106 EA 1.63
1/2"-20 0169107 EA 3.26
9/16"-18 0169108 EA Call for Price
5/8"-18 0169109 EA 5.02
3/4"-16 0169110 EA Call for Price
7/8"-14 0169111 EA Call for Price
1"-12 0169112 EA 16.91
1"-14 0169113 EA 9.95
1-1/8"-12 0169114 EA Call for Price
1-1/4"-12 0169115 EA 33.00
1-3/8"-12 0169116 EA Call for Price
1-1/2"-12 0169117 EA 34.97
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 Call for Price
1/2"-20 0169128 EA Call for Price
5/8"-18 0169129 EA Call for Price
7/8"-14 0169131 EA Call for Price
1"-14 0169132 EA 16.98
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 Call for Price
5/16"-24 0148093 EA Call for Price
3/8"-24 0148095 EA 1.55
7/16"-20 0148097 EA 1.51
1/2"-20 0148099 EA 1.48
5/8"-18 0148103 EA 6.71
3/4"-16 0148105 EA 3.56
7/8"-14 0148107 EA Call for Price
1"-12 0169121 EA Call for Price
1"-14 0148088 EA 15.37
1-1/8"-12 0169122 EA Call for Price
1-1/4"-12 0169123 EA Call for Price
1-3/8"-12 0169124 EA Call for Price
1-1/2"-12 0169125 EA 48.01
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 Call for Price
M24-3.0 11551251 EA Call for Price
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 Call for Price
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 2.81
M16-2.0 11507057 EA 1.46
M16-2.0 90693 EA 5.27
M18-2.5 11507060 EA Call for Price
M20-2.5 11507062 EA Call for Price
M20-2.5 90694 EA 7.22
M24-3.0 90695 EA 15.55
M30-3.5 90696 EA 20.21
M36-4.0 90697 EA 11.80
M42-4.5 90698 EA 77.22
M48-5.0 90699 EA Call for Price
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 2.40
M12-1.5 11508292 EA 2.22
M14-1.5 11507056 EA 2.70
M16-1.5 11507058 EA 1.93
M18-1.5 11507061 EA 3.40
M20-1.5 11507063 EA 1.44
M22-1.5 11507064 EA 3.20
M24-1.5 11505628 EA 6.85
M24-2.0 11505627 EA 4.46
M27-1.5 11505629 EA 7.92
M30-1.5 11505631 EA Call for Price
M30-2.0 11505630 EA 7.08