Inch Thumb Screws

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Inch Thumb Screws

Thumbscrews are hand-operated fasteners designed for quick and easy tightening or loosening without the need for tools. They feature a ridged or winged head that provides excellent grip, allowing users to adjust or secure components by hand.

Thumbscrews are commonly used where frequent adjustments, assembly, or maintenance are required—such as in machinery panels, enclosures, jigs, fixtures, and electronic equipment. Their tool-free design makes them ideal for applications prioritising convenience, accessibility, and repeatable use.

Available in a variety of materials and finishes.

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	Colour Cap	D	D1	D3	D4	H	H1	H2	K	L	Male/Female	Material	T	Price (Exc. Tax)	Stock
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K0247.02A35X40 View product	Grey	5/16-18	26	18	23	--	26	9.5	--	40	Male	--	--	£4.09	0
K0247.03A47 View product	Yellow	3/8-16	34	22	31	--	36	13	--	--	Female	--	14	£4.09	0
K0247.01A2 View product	Black	1/4-20	21	14	19	--	22	8	--	--	Female	--	10	£2.79	0
K0247.01AE6 View product	Red	8-32	21	14	19	--	22	8	--	--	Female	--	10	£2.79	0
K0247.01A1X20 View product	Black	10-32	21	14	19	--	22	8	--	20	Male	--	--	£3.12	0
K0247.01A1X10 View product	Black	10-32	21	14	19	--	22	8	--	10	Male	--	--	£3.00	0
K0247.01A17X10 View product	Yellow	10-32	21	14	19	--	22	8	--	10	Male	--	--	£3.00	0
K0247.01A16X10 View product	Red	10-32	21	14	19	--	22	8	--	10	Male	--	--	£3.00	0
K0247.01A15X10 View product	Grey	10-32	21	14	19	--	22	8	--	10	Male	--	--	£3.00	0
K0247.01A1 View product	Black	10-32	21	14	19	--	22	8	--	--	Female	--	10	£2.79	0
K0140.AEX20 View product	--	8-32	16	8	--	9.5	--	--	3.5	20	--	Free-cutting Steel	--	£3.96	0
K0140.A32X20 View product	--	5/16-18	30	16	--	18	--	--	6	20	--	Stainless Steel	--	£9.70	0
K0140.A32X16 View product	--	5/16-18	30	16	--	18	--	--	6	16	--	Stainless Steel	--	£9.05	0
K0140.A2X20 View product	--	1/4-20	24	12	--	15	--	--	5	20	--	Free-cutting Steel	--	£5.78	0
K0140.A4X25 View product	--	3/8-16	36	20	--	23	--	--	8	25	--	Free-cutting Steel	--	£12.35	0
K0140.A22X25 View product	--	1/4-20	24	12	--	15	--	--	5	25	--	Stainless Steel	--	£7.59	0
K0140.A22X20 View product	--	1/4-20	24	12	--	15	--	--	5	20	--	Stainless Steel	--	£7.00	0
K0140.A1X16 View product	--	10-32	20	10	--	11.5	--	--	4	16	--	Free-cutting Steel	--	£3.98	0
K0140.A12X16 View product	--	10-32	20	10	--	11.5	--	--	4	16	--	Stainless Steel	--	£4.89	0
K0137.1A5 View product	--	1/2-13	40	32	34	24	--	--	16	--	--	Free-cutting Steel	10	£14.74	0
K0137.1A3 View product	--	5/16-18	30	20	24	17	--	--	12	--	--	Free-cutting Steel	7	£6.74	0
K0137.1A22 View product	--	1/4-20	24	16	18	14	--	--	10	--	--	Stainless Steel	8	£5.79	0
K0137.1A1 View product	--	10-32	24	16	18	14	--	--	10	--	--	Free-cutting Steel	6	£4.25	0
K0137.1A02 View product	--	10-24	20	14	15	12	--	--	8	--	--	Stainless Steel	7	£4.97	0

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Dispatch by 19/11/25

Item Code: K0247.02A35X40

Knurled Knob Stainless Steel Thread. 5/16"-18x40 Thread. Grey Cap.

£4.09 Excl VAT £4.91 Inc VAT

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Dispatch by 19/11/25

Item Code: K0247.03A47

Knurled Knob Stainless Steel Thread. 3/8"-16 Thread. Yellow Cap.

£4.09 Excl VAT £4.91 Inc VAT

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Dispatch by 19/11/25

Item Code: K0247.01A2

Knurled Knob Stainless Steel Thread. 1/4"-20 Thread. Black Cap.

£2.79 Excl VAT £3.35 Inc VAT

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Dispatch by 19/11/25

Item Code: K0247.01AE6

Knurled Knob Stainless Steel Thread. 8-32" Thread. Red Cap.

£2.79 Excl VAT £3.35 Inc VAT

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Dispatch by 19/11/25

Item Code: K0247.01A1X20

Knurled Knob Stainless Steel Thread. 10-32"x20 Thread. Black Cap.

£3.12 Excl VAT £3.74 Inc VAT

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Dispatch by 19/11/25

Item Code: K0247.01A1X10

Knurled Knob Stainless Steel Thread. 10-32"x10 Thread. Black Cap.

£3.00 Excl VAT £3.60 Inc VAT

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Dispatch by 19/11/25

Item Code: K0247.01A17X10

Knurled Knob Stainless Steel Thread. 10-32"x10 Thread. Yellow Cap.

£3.00 Excl VAT £3.60 Inc VAT

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Dispatch by 19/11/25

Item Code: K0247.01A16X10

Knurled Knob Stainless Steel Thread. 10-32"x10 Thread. Red Cap.

£3.00 Excl VAT £3.60 Inc VAT

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Dispatch by 19/11/25

Item Code: K0247.01A15X10

Knurled Knob Stainless Steel Thread. 10-32"x10 Thread. Grey Cap.

£3.00 Excl VAT £3.60 Inc VAT

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Dispatch by 19/11/25

Item Code: K0247.01A1

Knurled Knob Stainless Steel Thread. 10-32" Thread. Black Cap.

£2.79 Excl VAT £3.35 Inc VAT

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Dispatch by 19/11/25

Item Code: K0140.AEX20

Knurled Thumbscrew. Free-cutting Steel. 8-32"x20mm Thread. 16mm Grip Diameter.

£3.96 Excl VAT £4.75 Inc VAT

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Dispatch by 19/11/25

Item Code: K0140.A32X20

Knurled Thumbscrew. Stainless Steel. 5/16"-18x20mm Thread. 30mm Grip Diameter.

£9.70 Excl VAT £11.64 Inc VAT

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Dispatch by 19/11/25

Item Code: K0140.A32X16

Knurled Thumbscrew. Stainless Steel. 5/16"-18x16mm Thread. 30mm Grip Diameter.

£9.05 Excl VAT £10.86 Inc VAT

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Dispatch by 19/11/25

Item Code: K0140.A2X20

Knurled Thumbscrew. Free-cutting Steel. 1/4"-20x20mm Thread. 24mm Grip Diameter.

£5.78 Excl VAT £6.94 Inc VAT

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Dispatch by 19/11/25

Item Code: K0140.A4X25

Knurled Thumbscrew. Free-cutting Steel. 3/8"-16x25mm Thread. 36mm Grip Diameter.

£12.35 Excl VAT £14.82 Inc VAT

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Dispatch by 19/11/25

Item Code: K0140.A22X25

Knurled Thumbscrew. Stainless Steel. 1/4"-20x25mm Thread. 24mm Grip Diameter.

£7.59 Excl VAT £9.11 Inc VAT

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Dispatch by 19/11/25

Item Code: K0140.A22X20

Knurled Thumbscrew. Stainless Steel. 1/4"-20x20mm Thread. 24mm Grip Diameter.

£7.00 Excl VAT £8.40 Inc VAT

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Dispatch by 19/11/25

Item Code: K0140.A1X16

Knurled Thumbscrew. Free-cutting Steel. 10-32"x16mm Thread. 20mm Grip Diameter.

£3.98 Excl VAT £4.78 Inc VAT

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Dispatch by 19/11/25

Item Code: K0140.A12X16

Knurled Thumbscrew. Stainless Steel. 10-32"x16mm Thread. 20mm Grip Diameter.

£4.89 Excl VAT £5.87 Inc VAT

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Dispatch by 19/11/25

Item Code: K0137.1A5

Knurled Nut. Free-cutting Steel. 1/2"-13 Thread. 40mm Grip Diameter.

£14.74 Excl VAT £17.69 Inc VAT

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Qty

Dispatch by 19/11/25

Item Code: K0137.1A3

Knurled Nut. Free-cutting Steel. 5/16"-18 Thread. 30mm Grip Diameter.

£6.74 Excl VAT £8.09 Inc VAT

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Qty

Dispatch by 19/11/25

Item Code: K0137.1A22

Knurled Nut. Stainless Steel. 1/4"-20 Thread. 24mm Grip Diameter.

£5.79 Excl VAT £6.95 Inc VAT

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Dispatch by 19/11/25

Item Code: K0137.1A1

Knurled Nut. Free-cutting Steel. 10-32" Thread. 24mm Grip Diameter.

£4.25 Excl VAT £5.10 Inc VAT

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Dispatch by 19/11/25

Item Code: K0137.1A02

Knurled Nut. Stainless Steel. 10-24" Thread. 20mm Grip Diameter.

Dispatch by 19/11/25

Item Code: K0137.1A02

£4.97 Excl VAT £5.96 Inc VAT

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Inch Thumb Screws

K0137 Inch - Knurled Nuts In Steel & Stainless Steel

K0140 Inch - Thumbscrews In Steel & Stainless Steel

K0247 Inch - Knurled Knobs Parts In Steel And Stainless Steel

K0250 Inch - Mushroom Knobs In Stainless Steel

K0251 Inch - Mushroom Knobs Plastic Parts In Steel And Stainless Steel

£4.09

£4.09

£2.79

£2.79

£3.12

£3.00

£3.00

£3.00

£3.00

£2.79

£3.96

£9.70

£9.05

£5.78

£12.35

£7.59

£7.00

£3.98

£4.89

£14.74

£6.74

£5.79

£4.25

£4.97

Knurled Knob Stainless Steel Thread. 5/16"-18x40 Thread. Grey Cap.

Knurled Knob Stainless Steel Thread. 3/8"-16 Thread. Yellow Cap.

Knurled Knob Stainless Steel Thread. 1/4"-20 Thread. Black Cap.

Knurled Knob Stainless Steel Thread. 8-32" Thread. Red Cap.

Knurled Knob Stainless Steel Thread. 10-32"x20 Thread. Black Cap.

Knurled Knob Stainless Steel Thread. 10-32"x10 Thread. Black Cap.

Knurled Knob Stainless Steel Thread. 10-32"x10 Thread. Yellow Cap.

Knurled Knob Stainless Steel Thread. 10-32"x10 Thread. Red Cap.

Knurled Knob Stainless Steel Thread. 10-32"x10 Thread. Grey Cap.

Knurled Knob Stainless Steel Thread. 10-32" Thread. Black Cap.

Knurled Thumbscrew. Free-cutting Steel. 8-32"x20mm Thread. 16mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 5/16"-18x20mm Thread. 30mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 5/16"-18x16mm Thread. 30mm Grip Diameter.

Knurled Thumbscrew. Free-cutting Steel. 1/4"-20x20mm Thread. 24mm Grip Diameter.

Knurled Thumbscrew. Free-cutting Steel. 3/8"-16x25mm Thread. 36mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 1/4"-20x25mm Thread. 24mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 1/4"-20x20mm Thread. 24mm Grip Diameter.

Knurled Thumbscrew. Free-cutting Steel. 10-32"x16mm Thread. 20mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 10-32"x16mm Thread. 20mm Grip Diameter.

Knurled Nut. Free-cutting Steel. 1/2"-13 Thread. 40mm Grip Diameter.

Knurled Nut. Free-cutting Steel. 5/16"-18 Thread. 30mm Grip Diameter.

Knurled Nut. Stainless Steel. 1/4"-20 Thread. 24mm Grip Diameter.

Knurled Nut. Free-cutting Steel. 10-32" Thread. 24mm Grip Diameter.

Knurled Nut. Stainless Steel. 10-24" Thread. 20mm Grip Diameter.