Knobs - Lobe - Three Lobe - Male - Standard

4 Products in this selection
  • Also see star knobs
Small Parts & Bearings

Additional resources:
Knobs PDF Quick Guide by Thread Size

A more comprehensive listing may be found on the MBA Minibearings main store at Knobs - Lobe - Three Lobe - Male - Standard.
Thread Size Head Diameter (A) Thread Length Colour Hub Diameter (C) Hub Length (D) Indicative
Image
Thread Size
1/4-20 UNC (6.35mm)
Head Diameter (A)
39.88
mm

(1.57 in.)
Thread Length
31.8
mm

(1.252 in.)
Colour
Black
Hub Diameter (C)
16.00
mm
Hub Length (D)
7.87
mm
Lobe Knobs - 1/4-20 UNC -6.35mm- 39.88x31.8 mm - Plated Steel
Material: Plated Steel    Knob Height (B): 24.89 mm   
Part Number: KM064C-040-3L Lobe Knobs - 1/4-20 UNC - 6.35mm - 39.88x31.8 mm Three Lobe - Plated Steel
10 Available Now | Further orders can be expected around Fri, Jul 18, 2025
$7.41 AUD
$7.41 AUD
Each
Thread Size Head Diameter (A) Thread Length Colour Indicative
Image
Thread Size
1/4-20 UNC (6.35mm)
Head Diameter (A)
39.88
mm

(1.57 in.)
Thread Length
31.8
mm

(1.252 in.)
Colour
Black
Lobe Knobs - 1/4-20 UNC -6.35mm- 39.88x31.8 mm - Plated Steel
Material: Plated Steel    Hub Diameter (C): 16.00 mm    Hub Length (D): 7.87 mm    Knob Height (B): 24.89 mm   
Part Number: KM064C-040-3L Lobe Knobs - 1/4-20 UNC - 6.35mm - 39.88x31.8 mm Three Lobe - Plated Steel
10 Available Now | Further orders can be expected around Fri, Jul 18, 2025
$7.41 AUD
$7.41 AUD
Each
View the product page first if you are unsure.
Thread Size
5/16-18 UNC (7.94mm)
Head Diameter (A)
39.88
mm

(1.57 in.)
Thread Length
38.1
mm

(1.5 in.)
Colour
Black
Hub Diameter (C)
16.00
mm
Hub Length (D)
7.87
mm
Lobe Knobs - 5/16-18 UNC -7.94mm- 39.88x38.1 mm - Plated Steel
Material: Plated Steel    Knob Height (B): 24.89 mm   
Part Number: KM079C-040-3LL Lobe Knobs - 5/16-18 UNC - 7.94mm - 39.88x38.1 mm Three Lobe - Plated Steel
4 Available Now | Further orders can be expected around Fri, Jul 18, 2025
$7.41 AUD
$7.41 AUD
Each
Thread Size
5/16-18 UNC (7.94mm)
Head Diameter (A)
39.88
mm

(1.57 in.)
Thread Length
38.1
mm

(1.5 in.)
Colour
Black
Lobe Knobs - 5/16-18 UNC -7.94mm- 39.88x38.1 mm - Plated Steel
Material: Plated Steel    Hub Diameter (C): 16.00 mm    Hub Length (D): 7.87 mm    Knob Height (B): 24.89 mm   
Part Number: KM079C-040-3LL Lobe Knobs - 5/16-18 UNC - 7.94mm - 39.88x38.1 mm Three Lobe - Plated Steel
4 Available Now | Further orders can be expected around Fri, Jul 18, 2025
$7.41 AUD
$7.41 AUD
Each
View the product page first if you are unsure.
Thread Size
5/16-18 UNC (7.94mm)
Head Diameter (A)
50.04
mm

(1.97 in.)
Thread Length
44.5
mm

(1.752 in.)
Colour
Black
Hub Diameter (C)
21.08
mm
Hub Length (D)
8.89
mm
Lobe Knobs - 5/16-18 UNC -7.94mm- 50.04x44.5 mm - Plated Steel
Material: Plated Steel    Knob Height (B): 30.99 mm   
Part Number: KM079C-050-3LL Lobe Knobs - 5/16-18 UNC - 7.94mm - 50.04x44.5 mm - Plated Steel
7 Available Now | Further orders can be expected around Fri, Jul 18, 2025
$9.32 AUD
$9.32 AUD
Each
Thread Size
5/16-18 UNC (7.94mm)
Head Diameter (A)
50.04
mm

(1.97 in.)
Thread Length
44.5
mm

(1.752 in.)
Colour
Black
Lobe Knobs - 5/16-18 UNC -7.94mm- 50.04x44.5 mm - Plated Steel
Material: Plated Steel    Hub Diameter (C): 21.08 mm    Hub Length (D): 8.89 mm    Knob Height (B): 30.99 mm   
Part Number: KM079C-050-3LL Lobe Knobs - 5/16-18 UNC - 7.94mm - 50.04x44.5 mm - Plated Steel
7 Available Now | Further orders can be expected around Fri, Jul 18, 2025
$9.32 AUD
$9.32 AUD
Each
View the product page first if you are unsure.
Thread Size
3/8-16 UNC (9.53mm)
Head Diameter (A)
39.88
mm

(1.57 in.)
Thread Length
38.1
mm

(1.5 in.)
Colour
Black
Hub Diameter (C)
16.00
mm
Hub Length (D)
7.87
mm
Lobe Knobs - 3/8-16 UNC -9.53mm- 39.88x38.1 mm - Plated Steel
Material: Plated Steel    Knob Height (B): 24.89 mm   
Part Number: KM095C-040-3LL Lobe Knobs - 3/8-16 UNC - 9.53mm - 39.88x38.1 mm Three Lobe - Plated Steel
1 Available Now | Further orders can be expected around Fri, Jul 18, 2025
$8.14 AUD
$8.14 AUD
Each
Thread Size
3/8-16 UNC (9.53mm)
Head Diameter (A)
39.88
mm

(1.57 in.)
Thread Length
38.1
mm

(1.5 in.)
Colour
Black
Lobe Knobs - 3/8-16 UNC -9.53mm- 39.88x38.1 mm - Plated Steel
Material: Plated Steel    Hub Diameter (C): 16.00 mm    Hub Length (D): 7.87 mm    Knob Height (B): 24.89 mm   
Part Number: KM095C-040-3LL Lobe Knobs - 3/8-16 UNC - 9.53mm - 39.88x38.1 mm Three Lobe - Plated Steel
1 Available Now | Further orders can be expected around Fri, Jul 18, 2025
$8.14 AUD
$8.14 AUD
Each
View the product page first if you are unsure.