Cap Nuts

362 products

Cap Nuts

Cap Nuts are specialized fasteners designed with a closed end that provides a finished appearance and protection for threaded ends in applications where aesthetics and safety are important. At Skdin, we offer high-quality Cap Nuts in various designs and materials, including stainless steel, brass, and nylon variants. Our cap nuts feature domed or acorn-shaped tops that completely cover the exposed thread ends, preventing snagging, providing corrosion protection, and creating a smooth, finished look. These nuts are ideal for applications where appearance matters or where exposed threads could pose a safety hazard. Explore our selection to find the perfect cap nuts for your specific application requirements.

System of Measurement
Inch Metric
Thread Size
0-80 1 1/4"-12 1 1/4"-7 1"-12 1"-14 1"-8 1-72 1/2"-13 1/2"-20 1/4"-18 1/4"-20 1/4"-28 10-24 10-32 12-24 12-28 2-56 3-48 3/4"-10 3/4"-16 3/8"-16 3/8"-24 4-40 4-48 5-40 5/16"-18 5/16"-24 5/8"-11 5/8"-18 6-32 6-40 7/16"-14 7/16"-20 7/8"-14 7/8"-9 8-32 8-36 9/16"-12 9/16"-18 M10 M12 M14 M16 M18 M20 M22 M24 M3 M4 M5 M6 M8
Material
18-8 Stainless Steel 2011 Aluminum 304 Stainless Steel 316 Stainless Steel Black Corrosion-Resistant-Coated Steel Black-Oxide Steel Brass Chrome-Plated Brass Chrome-Plated Steel Corrosion-Resistant-Coated Steel Nickel-Plated Brass Nickel-Plated Steel Nylon 6/6 Plastic Steel Zinc-Plated Steel
Nut Type
Cap Cap, Hex Cap, Locknut, Hex
Width
3/16" 1/4" 19/64" 5/16" 21/64" 11/32" 23/64" 3/8" 27/64" 7/16" 1/2" 9/16" 5/8" 11/16" 3/4" 7/8" 15/16" 1" 1 1/16" 1 1/8" 1 1/4" 1 3/8" 1 7/16" 1 13/16" 5.5 mm 7 mm 8 mm 10 mm 13 mm 16 mm 17 mm 18 mm 19 mm 22 mm 24 mm 27 mm 30 mm 34 mm 36 mm
Height
5/32" 3/16" 1/4" 9/32" 19/64" 5/16" 21/64" 11/32" 23/64" 3/8" 25/64" 13/32" 7/16" 15/32" 31/64" 1/2" 33/64" 17/32" 35/64" 9/16" 19/32" 5/8" 43/64" 11/16" 3/4" 13/16" 7/8" 15/16" 31/32" 63/64" 1" 1 1/16" 1 1/8" 1 5/32" 1 3/16" 1 1/4" 1 5/16" 1 23/64" 1 3/8" 1 7/16" 1 33/64" 1 35/64" 1 9/16" 1 5/8" 1 3/4" 1 61/64" 2" 3 15/16" 6 mm 8 mm 9.6 mm 10 mm 10.5 mm 12 mm 14 mm 15 mm 17 mm 18 mm 20.5 mm 22 mm 23 mm 25 mm 28 mm 32 mm 34 mm 35 mm 39 mm 42 mm
Drive Style
External Hex External Square
Thread Type
Metric UNC UNF UNS
Thread Pitch
0.5 mm 0.7 mm 0.8 mm 1 mm 1.25 mm 1.5 mm 1.75 mm 2 mm 2.5 mm 3 mm
Fastener Strength Grade/Class
Class 10 Class 6 Grade 2 Grade 5 Grade 8
Part Number Thread Size Thread Direction Thread Type Thread Fit Thread Depth Drive Style Width Height Material Nut Type
0996FA00008 9/16"-18 Right Hand UNF Class 2B 9/16" External Hex 7/8" 15/16" 18-8 Stainless Steel Cap, Hex
0998FA00019 9/16"-18 Right Hand UNF Class 2B 9/16" External Hex 7/8" 15/16" 316 Stainless Steel Cap, Hex
1015FA00005 M10 Right Hand Metric Class 6H 6.4 mm External Hex 16 mm 18 mm Zinc-Plated Steel Cap, Locknut, Hex
1001FA00011 M10 Right Hand Metric Class 6H 9.7 mm External Hex 17 mm 18 mm Chrome-Plated Steel Cap, Hex
1003FA00003 M10 Right Hand Metric Class 6H 9.7 mm External Hex 17 mm 18 mm Zinc-Plated Steel Cap, Hex
1006FA00005 M10 Right Hand Metric Class 6H 11 mm External Hex 17 mm 18 mm Nylon 6/6 Plastic Cap, Hex
0997FA00005 M10 Right Hand Metric Class 6H 12.7 mm External Hex 17 mm 18 mm 18-8 Stainless Steel Cap, Hex
1001FA00005 M10 Right Hand Metric Class 6H 12.7 mm External Hex 17 mm 18 mm Zinc-Plated Steel Cap, Hex
0999FA00006 M10 Right Hand Metric Class 6H 13 mm External Hex 17 mm 18 mm 316 Stainless Steel Cap, Hex
1011FA00003 M10 Right Hand Metric - 8 mm External Hex 16 mm 12 mm 316 Stainless Steel Cap, Hex
1015FA00006 M12 Right Hand Metric Class 6H 8.3 mm External Hex 18 mm 23 mm Zinc-Plated Steel Cap, Locknut, Hex
1001FA00012 M12 Right Hand Metric Class 6H 12.2 mm External Hex 19 mm 22 mm Chrome-Plated Steel Cap, Hex
1003FA00004 M12 Right Hand Metric Class 6H 12.2 mm External Hex 19 mm 22 mm Zinc-Plated Steel Cap, Hex
1006FA00006 M12 Right Hand Metric Class 6H 13.9 mm External Hex 19 mm 20.5 mm Nylon 6/6 Plastic Cap, Hex
0997FA00006 M12 Right Hand Metric Class 6H 15.7 mm External Hex 19 mm 22 mm 18-8 Stainless Steel Cap, Hex
1001FA00006 M12 Right Hand Metric Class 6H 15.7 mm External Hex 19 mm 22 mm Zinc-Plated Steel Cap, Hex
0999FA00007 M12 Right Hand Metric Class 6H 16 mm External Hex 19 mm 22 mm 316 Stainless Steel Cap, Hex
1011FA00004 M12 Right Hand Metric - 9 mm External Hex 18 mm 14 mm 316 Stainless Steel Cap, Hex
0997FA00010 M14 Right Hand Metric Class 6H 17.7 mm External Hex 22 mm 25 mm 18-8 Stainless Steel Cap, Hex
0999FA00008 M14 Right Hand Metric Class 6H 18 mm External Hex 22 mm 25 mm 316 Stainless Steel Cap, Hex
1015FA00007 M16 Right Hand Metric Class 6H 11.3 mm External Hex 24 mm 28 mm Zinc-Plated Steel Cap, Locknut, Hex
0997FA00011 M16 Right Hand Metric Class 6H 20.6 mm External Hex 24 mm 28 mm 18-8 Stainless Steel Cap, Hex
0999FA00009 M16 Right Hand Metric Class 6H 21 mm External Hex 24 mm 28 mm 316 Stainless Steel Cap, Hex
1011FA00005 M16 Right Hand Metric - 10.5 mm External Hex 24 mm 17 mm 316 Stainless Steel Cap, Hex
0997FA00012 M18 Right Hand Metric Class 6H 24.6 mm External Hex 27 mm 32 mm 18-8 Stainless Steel Cap, Hex
1015FA00008 M20 Right Hand Metric Class 6H 13.5 mm External Hex 30 mm 35 mm Zinc-Plated Steel Cap, Locknut, Hex
0997FA00013 M20 Right Hand Metric Class 6H 25.6 mm External Hex 30 mm 34 mm 18-8 Stainless Steel Cap, Hex
0999FA00010 M20 Right Hand Metric Class 6H 26 mm External Hex 30 mm 34 mm 316 Stainless Steel Cap, Hex
0997FA00007 M22 Right Hand Metric Class 6H 28.6 mm External Hex 34 mm 39 mm 18-8 Stainless Steel Cap, Hex
0999FA00011 M22 Right Hand Metric Class 6H 29 mm External Hex 34 mm 39 mm 316 Stainless Steel Cap, Hex
0997FA00008 M24 Right Hand Metric Class 6H 30.5 mm External Hex 36 mm 42 mm 18-8 Stainless Steel Cap, Hex
0999FA00012 M24 Right Hand Metric Class 6H 31 mm External Hex 36 mm 42 mm 316 Stainless Steel Cap, Hex
0997FA00009 M3 Right Hand Metric Class 6H 3.8 mm External Hex 5.5 mm 6 mm 18-8 Stainless Steel Cap, Hex
0999FA00001 M3 Right Hand Metric Class 6H 3.8 mm External Hex 5.5 mm 6 mm 316 Stainless Steel Cap, Hex
1015FA00001 M4 Right Hand Metric Class 6H 2.3 mm External Hex 7 mm 9.6 mm Zinc-Plated Steel Cap, Locknut, Hex
1001FA00007 M4 Right Hand Metric Class 6H 3.9 mm External Hex 7 mm 8 mm Chrome-Plated Steel Cap, Hex
1001FA00001 M4 Right Hand Metric Class 6H 5.3 mm External Hex 7 mm 8 mm Zinc-Plated Steel Cap, Hex
0999FA00002 M4 Right Hand Metric Class 6H 5.5 mm External Hex 7 mm 8 mm 316 Stainless Steel Cap, Hex
0997FA00001 M4 Right Hand Metric Class 6H 5.7 mm External Hex 7 mm 8 mm 18-8 Stainless Steel Cap, Hex
1006FA00001 M4 Right Hand Metric Class 6H 5.9 mm External Hex 7 mm 8 mm Nylon 6/6 Plastic Cap, Hex
1015FA00002 M5 Right Hand Metric Class 6H 3.5 mm External Hex 8 mm 10.5 mm Zinc-Plated Steel Cap, Locknut, Hex
1001FA00008 M5 Right Hand Metric Class 6H 5.6 mm External Hex 8 mm 10 mm Chrome-Plated Steel Cap, Hex
1006FA00002 M5 Right Hand Metric Class 6H 6.8 mm External Hex 8 mm 10 mm Nylon 6/6 Plastic Cap, Hex
0997FA00002 M5 Right Hand Metric Class 6H 7.2 mm External Hex 8 mm 10 mm 18-8 Stainless Steel Cap, Hex
1001FA00002 M5 Right Hand Metric Class 6H 7.2 mm External Hex 8 mm 10 mm Zinc-Plated Steel Cap, Hex
0999FA00003 M5 Right Hand Metric Class 6H 7.5 mm External Hex 8 mm 10 mm 316 Stainless Steel Cap, Hex
1015FA00003 M6 Right Hand Metric Class 6H 3.9 mm External Hex 10 mm 12 mm Zinc-Plated Steel Cap, Locknut, Hex
1001FA00009 M6 Right Hand Metric Class 6H 5.7 mm External Hex 10 mm 12 mm Chrome-Plated Steel Cap, Hex
1003FA00001 M6 Right Hand Metric Class 6H 5.7 mm External Hex 10 mm 12 mm Zinc-Plated Steel Cap, Hex
0997FA00003 M6 Right Hand Metric Class 6H 7.7 mm External Hex 10 mm 12 mm 18-8 Stainless Steel Cap, Hex
1001FA00003 M6 Right Hand Metric Class 6H 7.7 mm External Hex 10 mm 12 mm Zinc-Plated Steel Cap, Hex
0999FA00004 M6 Right Hand Metric Class 6H 8 mm External Hex 10 mm 12 mm 316 Stainless Steel Cap, Hex
1006FA00003 M6 Right Hand Metric Class 6H 8 mm External Hex 10 mm 12 mm Nylon 6/6 Plastic Cap, Hex
1011FA00001 M6 Right Hand Metric - 5.5 mm External Hex 10 mm 8 mm 316 Stainless Steel Cap, Hex
1015FA00004 M8 Right Hand Metric Class 6H 5.2 mm External Hex 13 mm 14 mm Zinc-Plated Steel Cap, Locknut, Hex
1001FA00010 M8 Right Hand Metric Class 6H 8.2 mm External Hex 13 mm 15 mm Chrome-Plated Steel Cap, Hex
1003FA00002 M8 Right Hand Metric Class 6H 8.2 mm External Hex 13 mm 15 mm Zinc-Plated Steel Cap, Hex
1006FA00004 M8 Right Hand Metric Class 6H 8.6 mm External Hex 13 mm 15 mm Nylon 6/6 Plastic Cap, Hex
0997FA00004 M8 Right Hand Metric Class 6H 10.7 mm External Hex 13 mm 15 mm 18-8 Stainless Steel Cap, Hex
1001FA00004 M8 Right Hand Metric Class 6H 10.7 mm External Hex 13 mm 15 mm Zinc-Plated Steel Cap, Hex
0999FA00005 M8 Right Hand Metric Class 6H 11 mm External Hex 13 mm 15 mm 316 Stainless Steel Cap, Hex
1011FA00002 M8 Right Hand Metric - 6.5 mm External Hex 13 mm 10 mm 316 Stainless Steel Cap, Hex
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