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Cap Nuts

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Cap Nuts are a type of nut with a dome-shaped top. It secures and covers exposed threaded studs, rods, and bolt ends with a dome-like cap. This protects and secures the fastening component while providing a finished appearance to the exposed threaded end. The dome-shaped caps are designed to be readily grabbed and tightened by hand or wrench.

It works as a locking mechanism, preventing the nut from becoming loose due to vibration or movement. Our range includes Hex Cap Dome Nuts, which have a hexagonal nut shape with a dome or cap that encloses exterior threads. They are available with or without a moulded-in locking thread for applications requiring torque for a more secure assembly. Commonly utilised in automotive, industrial, and commercial applications.

  • Material: Nylon
  • Colour: Natural, Black

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71 results
Product SKUs information
Item Code Price range Availability Thread Size Distance Across Flats Colour Nut Form Overall Height View
$0.1488 - $0.1737 9000 In stock
M5 x 0.8
0.315 in
Natural
Dome
0.394 in
$0.1155 - $0.1346 13000 In stock
#4-40
0.250 in
Natural
Dome
0.280 in
$0.2204 - $0.3023 1500 In stock
5/16-24
0.500 in
Natural
Dome
0.530 in
$0.1476 - $0.2025 18000 In stock
5/16-18
0.500 in
Black
Dome
0.530 in
$0.45 - $1.0248 3000 In stock
3/8-16
0.565 in
Black
0.620 in
$0.2426 - $0.3326 36500 In stock
5/16-24
0.500 in
Black
Dome
0.530 in
$0.3864 - $0.4511 1000 In stock
3/8-16
0.565 in
Black
Dome
0.620 in
$0.2535 - $0.3477 500 In stock
5/16-18
0.500 in
Black
0.530 in
$0.1346 - $0.3063 500 In stock
#4-40
0.250 in
Black
0.280 in
$0.1193 - $0.1391 41000 In stock
#6-32
0.305 in
Natural
Dome
0.345 in
$0.0881 - $0.1206 5500 In stock
#4-40
0.250 in
Natural
0.280 in
$0.0968 - $0.1326 2500 In stock
#10-32
0.365 in
Natural
0.400 in
$0.2942 - $0.4035 4500 In stock
3/8-16
0.565 in
Natural
0.620 in
$0.0968 - $0.1326 2000 In stock
#10-24
0.365 in
Natural
0.400 in
$0.1269 - $0.1481 4000 In stock
#4-40
0.250 in
Black
Dome
0.280 in
$0.1355 - $0.158 7000 In stock
#8-32
0.330 in
Black
Dome
0.375 in
$0.1445 - $0.1682 7000 In stock
M4 x 0.7
0.276 in
Black
Dome
0.315 in
$0.2291 - $0.2673 Request the lead time here
M8 x 1.25
0.512 in
Natural
Dome
0.591 in
$0.9483 - $1.1061 1000 In stock
M20 x 2.5
1.051 in
Natural
Dome
1.146 in
$0.4233 - $0.5805 10000 In stock
1/2-13
0.750 in
Black
Dome
0.810 in
  • of 4
Hexagonal Cap Nut - Thread Size M5 x 0.8; Distance Across Flats 8.0 mm | 0.315 in; Overall Height 10.0 mm | 0.394 in; Natural; Nylon 6/6

05M050080LCN

Price Range
$0.1737 - $0.1488

Stock Levels
9000 In stock
Attributes
  • Overall Height
    0.394 in
  • Distance Across Flats
    0.315 in
  • Thread Size
    M5 x 0.8
  • Colour
    Natural
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size #4-40; Distance Across Flats 6.4 mm | 0.250 in; Overall Height 7.1 mm | 0.280 in; Natural; Nylon 6/6

0500440CN

Price Range
$0.1346 - $0.1155

Stock Levels
13000 In stock
Attributes
  • Overall Height
    0.280 in
  • Distance Across Flats
    0.250 in
  • Thread Size
    #4-40
  • Colour
    Natural
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size 5/16-24; Distance Across Flats 12.7 mm | 0.500 in; Overall Height 13.5 mm | 0.530 in; Natural; Nylon 6/6

0531224CN

Price Range
$0.3023 - $0.2204

Stock Levels
1500 In stock
Attributes
  • Overall Height
    0.530 in
  • Distance Across Flats
    0.500 in
  • Thread Size
    5/16-24
  • Colour
    Natural
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size 5/16-18; Distance Across Flats 12.7 mm | 0.500 in; Overall Height 13.5 mm | 0.530 in; Black; Nylon 6/6

0531218CNB

Price Range
$0.2025 - $0.1476

Stock Levels
18000 In stock
Attributes
  • Overall Height
    0.530 in
  • Distance Across Flats
    0.500 in
  • Thread Size
    5/16-18
  • Colour
    Black
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size 3/8-16; Distance Across Flats 14.4 mm | 0.565 in; Overall Height 15.7 mm | 0.620 in; Black; Nylon 6/6

0537516LCNB

Price Range
$1.0248 - $0.45

Stock Levels
3000 In stock
Attributes
  • Overall Height
    0.620 in
  • Distance Across Flats
    0.565 in
  • Thread Size
    3/8-16
  • Colour
    Black
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size 5/16-24; Distance Across Flats 12.7 mm | 0.500 in; Overall Height 13.5 mm | 0.530 in; Black; Nylon 6/6

0531224CNB

Price Range
$0.3326 - $0.2426

Stock Levels
36500 In stock
Attributes
  • Overall Height
    0.530 in
  • Distance Across Flats
    0.500 in
  • Thread Size
    5/16-24
  • Colour
    Black
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size 3/8-16; Distance Across Flats 14.4 mm | 0.565 in; Overall Height 15.7 mm | 0.620 in; Black; Nylon 6/6

0537516CNB

Price Range
$0.4511 - $0.3864

Stock Levels
1000 In stock
Attributes
  • Overall Height
    0.620 in
  • Distance Across Flats
    0.565 in
  • Thread Size
    3/8-16
  • Colour
    Black
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size 5/16-18; Distance Across Flats 12.7 mm | 0.500 in; Overall Height 13.5 mm | 0.530 in; Black; Nylon 6/6

0531218LCNB

Price Range
$0.3477 - $0.2535

Stock Levels
500 In stock
Attributes
  • Overall Height
    0.530 in
  • Distance Across Flats
    0.500 in
  • Thread Size
    5/16-18
  • Colour
    Black
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size #4-40; Distance Across Flats 6.4 mm | 0.250 in; Overall Height 7.1 mm | 0.280 in; Black; Nylon 6/6

0500440LCNB

Price Range
$0.3063 - $0.1346

Stock Levels
500 In stock
Attributes
  • Overall Height
    0.280 in
  • Distance Across Flats
    0.250 in
  • Thread Size
    #4-40
  • Colour
    Black
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size #6-32; Distance Across Flats 7.7 mm | 0.305 in; Overall Height 8.8 mm | 0.345 in; Natural; Nylon 6/6

0500632CN

Price Range
$0.1391 - $0.1193

Stock Levels
41000 In stock
Attributes
  • Overall Height
    0.345 in
  • Distance Across Flats
    0.305 in
  • Thread Size
    #6-32
  • Colour
    Natural
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size #4-40; Distance Across Flats 6.4 mm | 0.250 in; Overall Height 7.1 mm | 0.280 in; Natural; Nylon 6/6

0500440LCN

Price Range
$0.1206 - $0.0881

Stock Levels
5500 In stock
Attributes
  • Overall Height
    0.280 in
  • Distance Across Flats
    0.250 in
  • Thread Size
    #4-40
  • Colour
    Natural
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size #10-32; Distance Across Flats 9.3 mm | 0.365 in; Overall Height 10.2 mm | 0.400 in; Natural; Nylon 6/6

0501032LCN

Price Range
$0.1326 - $0.0968

Stock Levels
2500 In stock
Attributes
  • Overall Height
    0.400 in
  • Distance Across Flats
    0.365 in
  • Thread Size
    #10-32
  • Colour
    Natural
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size 3/8-16; Distance Across Flats 14.4 mm | 0.565 in; Overall Height 15.7 mm | 0.620 in; Natural; Nylon 6/6

0537516LCN

Price Range
$0.4035 - $0.2942

Stock Levels
4500 In stock
Attributes
  • Overall Height
    0.620 in
  • Distance Across Flats
    0.565 in
  • Thread Size
    3/8-16
  • Colour
    Natural
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size #10-24; Distance Across Flats 9.3 mm | 0.365 in; Overall Height 10.2 mm | 0.400 in; Natural; Nylon 6/6

0501024LCN

Price Range
$0.1326 - $0.0968

Stock Levels
2000 In stock
Attributes
  • Overall Height
    0.400 in
  • Distance Across Flats
    0.365 in
  • Thread Size
    #10-24
  • Colour
    Natural
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size #4-40; Distance Across Flats 6.4 mm | 0.250 in; Overall Height 7.1 mm | 0.280 in; Black; Nylon 6/6

0500440CNB

Price Range
$0.1481 - $0.1269

Stock Levels
4000 In stock
Attributes
  • Overall Height
    0.280 in
  • Distance Across Flats
    0.250 in
  • Thread Size
    #4-40
  • Colour
    Black
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size #8-32; Distance Across Flats 8.4 mm | 0.330 in; Overall Height 9.5 mm | 0.375 in; Black; Nylon 6/6

0500832CNB

Price Range
$0.158 - $0.1355

Stock Levels
7000 In stock
Attributes
  • Overall Height
    0.375 in
  • Distance Across Flats
    0.330 in
  • Thread Size
    #8-32
  • Colour
    Black
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size M4 x 0.7; Distance Across Flats 7.0 mm | 0.276 in; Overall Height 8.0 mm | 0.315 in; Black; Nylon 6/6

05M040070CNB

Price Range
$0.1682 - $0.1445

Stock Levels
7000 In stock
Attributes
  • Overall Height
    0.315 in
  • Distance Across Flats
    0.276 in
  • Thread Size
    M4 x 0.7
  • Colour
    Black
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size M8 x 1.25; Distance Across Flats 13.0 mm | 0.512 in; Overall Height 15.0 mm | 0.591 in; Natural; Nylon 6/6

05M080125CN

Price Range
$0.2673 - $0.2291

Stock Levels
Request the lead time here
Attributes
  • Overall Height
    0.591 in
  • Distance Across Flats
    0.512 in
  • Thread Size
    M8 x 1.25
  • Colour
    Natural
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size M20 x 2.5; Distance Across Flats 26.7 mm | 1.051 in; Overall Height 29.1 mm | 1.146 in; Natural; Nylon 6/6

05M200250CN

Price Range
$1.1061 - $0.9483

Stock Levels
1000 In stock
Attributes
  • Overall Height
    1.146 in
  • Distance Across Flats
    1.051 in
  • Thread Size
    M20 x 2.5
  • Colour
    Natural
  • Full Material
    Nylon 6/6
Hexagonal Cap Nut - Thread Size 1/2-13; Distance Across Flats 19.1 mm | 0.750 in; Overall Height 20.6 mm | 0.810 in; Black; Nylon 6/6

0550013CNB

Price Range
$0.5805 - $0.4233

Stock Levels
10000 In stock
Attributes
  • Overall Height
    0.810 in
  • Distance Across Flats
    0.750 in
  • Thread Size
    1/2-13
  • Colour
    Black
  • Full Material
    Nylon 6/6