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	Component Material	D	D1	D3	D4	H	H1	H2	K	L	Male/Female	Material	T	Price (Exc. Tax)	Stock
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K0247.03A47X40 View product	Yellow	Stainless Steel	3/8-16	34	22	31	--	36	13	--	40	Male	--	--	£3.47	0
K0247.02A36 View product	Red	Stainless Steel	5/16-18	26	18	23	--	26	9.5	--	--	Female	--	14	£2.35	0
K0247.01A26 View product	Red	Stainless Steel	1/4-20	21	14	19	--	22	8	--	--	Female	--	10	£1.90	0
K0247.03A46X40 View product	Red	Stainless Steel	3/8-16	34	22	31	--	36	13	--	40	Male	--	--	£3.47	0
K0247.01A25 View product	Grey	Stainless Steel	1/4-20	21	14	19	--	22	8	--	--	Female	--	10	£1.90	0
K0247.01AE7 View product	Yellow	Stainless Steel	8-32	21	14	19	--	22	8	--	--	Female	--	10	£1.90	0
K0247.01AE5 View product	Grey	Stainless Steel	8-32	21	14	19	--	22	8	--	--	Female	--	10	£1.90	0
K0247.01A16X20 View product	Red	Stainless Steel	10-32	21	14	19	--	22	8	--	20	Male	--	--	£2.13	0
K0247.01A15 View product	Grey	Stainless Steel	10-32	21	14	19	--	22	8	--	--	Female	--	10	£1.90	0
K0140.A3X20 View product	--	--	5/16-18	30	16	--	18	--	--	6	20	--	Free-cutting Steel	--	£6.05	0
K0140.A32X25 View product	--	--	5/16-18	30	16	--	18	--	--	6	25	--	Stainless Steel	--	£8.06	0
K0140.AE2X16 View product	--	--	8-32	16	8	--	9.5	--	--	3.5	16	--	Stainless Steel	--	£3.19	0
K0140.AE2X10 View product	--	--	8-32	16	8	--	9.5	--	--	3.5	10	--	Stainless Steel	--	£2.86	0
K0140.A2X10 View product	--	--	1/4-20	24	12	--	15	--	--	5	10	--	Free-cutting Steel	--	£3.61	0
K0140.A42X20 View product	--	--	3/8-16	36	20	--	23	--	--	8	20	--	Stainless Steel	--	£10.40	0
K0140.A3X25 View product	--	--	5/16-18	30	16	--	18	--	--	6	25	--	Free-cutting Steel	--	£6.71	0
K0140.A22X16 View product	--	--	1/4-20	24	12	--	15	--	--	5	16	--	Stainless Steel	--	£4.83	0
K0140.A22X10 View product	--	--	1/4-20	24	12	--	15	--	--	5	10	--	Stainless Steel	--	£4.42	0
K0140.A12X10 View product	--	--	10-32	20	10	--	11.5	--	--	4	10	--	Stainless Steel	--	£3.42	0
K0140.A02X10 View product	--	--	10-24	20	10	--	11.5	--	--	4	10	--	Stainless Steel	--	£3.42	0
K0137.1A42 View product	--	--	3/8-16	36	28	30	20	--	--	14	--	--	Stainless Steel	12	£8.44	0
K0137.1A32 View product	--	--	5/16-18	30	20	24	17	--	--	12	--	--	Stainless Steel	10	£5.47	0
K0137.1A2 View product	--	--	1/4-20	24	16	18	14	--	--	10	--	--	Free-cutting Steel	6	£3.51	0
K0137.1A12 View product	--	--	10-32	20	14	15	12	--	--	8	--	--	Stainless Steel	5	£3.51	0

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Item Code: K0247.03A47X40

Knurled Knob Stainless Steel Thread. 3/8"-16x40 Thread. Yellow Cap.

£3.47 Excl VAT £4.16 Inc VAT

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Item Code: K0247.02A36

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

£2.35 Excl VAT £2.82 Inc VAT

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Item Code: K0247.01A26

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

£1.90 Excl VAT £2.28 Inc VAT

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Item Code: K0247.03A46X40

Knurled Knob Stainless Steel Thread. 3/8"-16x40 Thread. Red Cap.

£3.47 Excl VAT £4.16 Inc VAT

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Item Code: K0247.01A25

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

£1.90 Excl VAT £2.28 Inc VAT

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Item Code: K0247.01AE7

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

£1.90 Excl VAT £2.28 Inc VAT

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Item Code: K0247.01AE5

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

£1.90 Excl VAT £2.28 Inc VAT

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Item Code: K0247.01A16X20

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

£2.13 Excl VAT £2.56 Inc VAT

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Item Code: K0247.01A15

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

£1.90 Excl VAT £2.28 Inc VAT

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Item Code: K0140.A3X20

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

£6.05 Excl VAT £7.26 Inc VAT

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Item Code: K0140.A32X25

Knurled Thumbscrew. Stainless Steel. 5/16"-18x25mm Thread. 30mm Grip Diameter.

£8.06 Excl VAT £9.67 Inc VAT

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Item Code: K0140.AE2X16

Knurled Thumbscrew. Stainless Steel. 8-32"x16mm Thread. 16mm Grip Diameter.

£3.19 Excl VAT £3.83 Inc VAT

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Item Code: K0140.AE2X10

Knurled Thumbscrew. Stainless Steel. 8-32"x10mm Thread. 16mm Grip Diameter.

£2.86 Excl VAT £3.43 Inc VAT

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Item Code: K0140.A2X10

Knurled Thumbscrew. Free-cutting Steel. 1/4"-20x10mm Thread. 24mm Grip Diameter.

£3.61 Excl VAT £4.33 Inc VAT

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Item Code: K0140.A42X20

Knurled Thumbscrew. Stainless Steel. 3/8"-16x20mm Thread. 36mm Grip Diameter.

£10.40 Excl VAT £12.48 Inc VAT

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Item Code: K0140.A3X25

Knurled Thumbscrew. Free-cutting Steel. 5/16"-18x25mm Thread. 30mm Grip Diameter.

£6.71 Excl VAT £8.05 Inc VAT

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Item Code: K0140.A22X16

Knurled Thumbscrew. Stainless Steel. 1/4"-20x16mm Thread. 24mm Grip Diameter.

£4.83 Excl VAT £5.80 Inc VAT

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Item Code: K0140.A22X10

Knurled Thumbscrew. Stainless Steel. 1/4"-20x10mm Thread. 24mm Grip Diameter.

£4.42 Excl VAT £5.30 Inc VAT

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Item Code: K0140.A12X10

Knurled Thumbscrew. Stainless Steel. 10-32"x10mm Thread. 20mm Grip Diameter.

£3.42 Excl VAT £4.10 Inc VAT

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Dispatch by 19/01/26

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Item Code: K0140.A02X10

Knurled Thumbscrew. Stainless Steel. 10-24"x10mm Thread. 20mm Grip Diameter.

£3.42 Excl VAT £4.10 Inc VAT

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Dispatch by 19/01/26

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Item Code: K0137.1A42

Knurled Nut. Stainless Steel. 3/8"-16 Thread. 36mm Grip Diameter.

£8.44 Excl VAT £10.13 Inc VAT

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Item Code: K0137.1A32

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

£5.47 Excl VAT £6.56 Inc VAT

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Item Code: K0137.1A2

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

£3.51 Excl VAT £4.21 Inc VAT

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Item Code: K0137.1A12

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

£3.51 Excl VAT £4.21 Inc VAT

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Item Code: K0137.1A12

£3.51 Excl VAT £4.21 Inc VAT

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Category Image Schema

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

£3.47

£2.35

£1.90

£3.47

£1.90

£1.90

£1.90

£2.13

£1.90

£6.05

£8.06

£3.19

£2.86

£3.61

£10.40

£6.71

£4.83

£4.42

£3.42

£3.42

£8.44

£5.47

£3.51

£3.51

Knurled Knob Stainless Steel Thread. 3/8"-16x40 Thread. Yellow Cap.

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

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

Knurled Knob Stainless Steel Thread. 3/8"-16x40 Thread. Red Cap.

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

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

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

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

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

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

Knurled Thumbscrew. Stainless Steel. 5/16"-18x25mm Thread. 30mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 8-32"x16mm Thread. 16mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 8-32"x10mm Thread. 16mm Grip Diameter.

Knurled Thumbscrew. Free-cutting Steel. 1/4"-20x10mm Thread. 24mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 3/8"-16x20mm Thread. 36mm Grip Diameter.

Knurled Thumbscrew. Free-cutting Steel. 5/16"-18x25mm Thread. 30mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 1/4"-20x16mm Thread. 24mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 1/4"-20x10mm Thread. 24mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 10-32"x10mm Thread. 20mm Grip Diameter.

Knurled Thumbscrew. Stainless Steel. 10-24"x10mm Thread. 20mm Grip Diameter.

Knurled Nut. Stainless Steel. 3/8"-16 Thread. 36mm Grip Diameter.

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

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

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