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On this page you will find our range of No 1, 2, No 3, No 4, No 5,No 6, No 8, No 10  and 1/4" UNC high tensile strength steel socket cap screws.

UNC and UNF threads are designated with a size ref followed by the threads per inch

i.e. 2-56 = No 2 size with 56 threads per inch
4-40 = No 4 size with 40 threads per inch

For more data on UNC, UNF and many other types of thread - please click here

To go to our UNF range, please click here.

Looking for 0-80? This is a UNF size and listed here

Socket sizes are stated in millimetres (imperial sizes have been converted to metric). If you need a key, click on the symbol in the tables below and you will be taken to the allen key and ball driver page.
Tools and ancillary items such as nuts and washers for each size are now also listed at the bottom of each size section.

For a guide to suitable washers, please scroll to the bottom of the page or click here

Many other sizes are available, so if the size you need is not listed then please e mail us for a quotation via the fixings enquiry page.

To order, click on the 'Add to Order' button alongside the item of your choice. You can select the quantity on the order form (default is 1). To continue ordering other items, use the 'Back' button on your browser, or the continue shopping button on the order form - the order form will retain the information until you are ready to submit your order.

You can review and edit your order, or submit your order at any time by using the button at the bottom of each list.

UNC screw lengths are primarily sized in inches, but metric equivalents are given (to 2 decimal places).

All prices include 20% VAT  Click here for details

UNC Socket Cap Screws High Tensile Steel Black Finish

1 UNC	Please scroll down to the bottom of this 1 UNC section for related tools and ancillary items
Thread	Overall Length L		Thread Length TL (Approx)		Socket size	Pack Qty	MF Ref	Pack Price	You can enter/change the number of items on the order form
	Inches	mm	Inches	mm	A/F
	Where L and TL values are equal, the shank is fully threaded				mm
1-64	1/4	6.35	1/4	6.35		5	MF-SC204	£0.95
						25	MF-SC204/25	£4.25
1-64	5/16	7.94	5/16	7.94		5	MF-SC205	£0.95
						25	MF-SC205/25	£4.25
1-64	3/8	9.53	3/8	9.53		5	MF-SC206	£0.95
						25	MF-SC206/25	£4.25
Driving Tools for 1 - 64 UNC Socket Cap Screws
1.6mm Hex/Allen Key							MF-HK-16	£0.60
1.6mm Hex/Ball Driver							MF-BD-62	£2.75
2 UNC	Please scroll down to the bottom of this 2 UNC section for for related ancillaries and tools
Thread	Overall Length L		Thread Length TL (Approx)		Socket size	Pack Qty	MF Ref	Pack Price	You can enter/change the number of items on the order form
	Inches	mm	Inches	mm	A/F
	Where L and TL values are equal, the shank is fully threaded				mm
2-56	1/8	3.18	1/8	3.18		5	MF-SC220	£0.95
						25	MF-SC220/25	£4.25
2-56	3/16	4.76	3/16	4.76		5	MF-SC221	£0.95
						25	MF-SC221/25	£4.25
2-56	1/4	6.35	1/4	6.35		5	MF-SC222	£0.95
						25	MF-SC222/25	£4.25
2-56	3/8	9.53	3/8	9.53		5	MF-SC223	£0.95
						25	MF-SC223/25	£4.25
2-56	1/2	12.7	1/2	12.7		5	MF-SC224	£0.95
						25	MF-SC224/25	£4.25
2-56	5/8	15.9	5/8	15.9		5	MF-SC229	£1.05
						25	MF-SC229/25	£4.70
2-56	3/4	19	3/4	19		5	MF-SC225	£1.25
						25	MF-SC225/25	£5.65
2-56	1	25.4	3/4	19		5	MF-SC226	£1.90
						25	MF-SC226/25	£8.55
	Sorry - this item is temporarily out of stock
2-56	1 1/4	32	1/2	12.7		2	MF-SC227	£1.90
						10	MF-SC227/10	£8.55
	Sorry - this item is temporarily out of stock
2-56	1 1/2	38	1/2	12.7		2	MF-SC228	£1.90
						10	MF-SC228/10	£8.55
Driving Tools for 2 - 56 UNC Socket Cap Screws
2.0mm Hex/Allen Key							MF-HK-20	£0.50
2mm Hex/Ball Driver							MF-BD-20	£2.75
2mm T Handle Driver							MF-TH-20	£4.95

Popular ancillary items often ordered with 2 UNC Steel Socket Cap Screws
	Description	Pack Qty	Pack Price				Description	Pack Qty	Pack Price
	2UNC Steel BZP Hex Nuts	10	£0.60				*M2 St Steel Flat Washers	20	£0.80
	2UNC Steel BZP Nyloc Nuts	10	£0.70				*M2 St Steel Spring Washers	20	£0.40
To see our full range of nuts and/or order larger quantities, please click here						To see our full range of washers and/or order larger quantities, please click here
						*M2 washers are suitable for use with 2 UNC screws

3 UNC	Please scroll down to the bottom of this 3 UNC section for related tools and ancillary items
Thread	Overall Length L		Thread Length TL (Approx)		Socket size	Pack Qty	MF Ref	Pack Price	You can enter/change the number of items on the order form
	Inches	mm	Inches	mm	A/F
	Where L and TL values are equal, the shank is fully threaded				mm
3-48	3/16	4.76	3/16	4.76		5	MF-SC271	£1.00
						25	MF-SC271/25	£4.00
3-48	1/4	6.35	1/4	6.35		5	MF-SC272	£1.00
						25	MF-SC272/25	£4.00
3-48	3/8	9.53	3/8	9.53		5	MF-SC273	£1.00
						25	MF-SC273/25	£4.00
3-48	1/2	12.7	1/2	12.7		5	MF-SC274	£1.00
						25	MF-SC274/25	£4.00
3-48	5/8	15.8	1/2	12.7		5	MF-SC277	£1.00
						25	MF-SC277/25	£4.00
	Sorry - this item is temporarily out of stock
3-48	3/4	19	3/4	19		5	MF-SC275	£1.00
						25	MF-SC275/25	£4.00
3-48	1	25.4	3/4	19		5	MF-SC276	£1.00
						25	MF-SC276/25	£4.00
Driving Tools for 3 - 48 UNC Socket Cap Screws
2.0mm Hex/Allen Key							MF-HK-20	£0.50
2mm Hex/Ball Driver							MF-BD-20	£2.75
2mm T Handle Driver							MF-TH-20	£4.95

Popular ancillary items often ordered with 3 UNC Steel Socket Cap Screws
	Description	Pack Qty	Pack Price				Description	Pack Qty	Pack Price
	3 UNC Steel BZP Hex Nuts	10	£1.00				M2.5* Steel BZP Flat Washers	20	£0.60
	3 UNC Steel BZP Nyloc Nuts	10	£1.00				M2.5* Steel BZP Spring Washers	20	£0.50
To see our full range of nuts and/or order larger quantities, please click here						To see our full range of washers and/or order larger quantities, please click here
						*M2.5 washers are suitable for use with 3 UNC screws

 

4 UNC	Please scroll down to the bottom of this 4 UNC section for for related ancillaries and tools
Thread	Overall Length L		Thread Length TL (Approx)		Socket size	Pack Qty	MF Ref	Pack Price	You can enter/change the number of items on the order form
	Inches	mm	Inches	mm	A/F
	Where L and TL values are equal, the shank is fully threaded				mm

4-40	1/4	6.35	1/4	6.35		5	MF-SC230	£0.85
						25	MF-SC230/25	£3.50
4-40	3/8	9.53	3/8	9.53		5	MF-SC231	£0.85
						25	MF-SC231/25	£3.50
4-40	1/2	12.7	1/2	12.7		5	MF-SC232	£0.85
						25	MF-SC232/25	£3.50
4-40	5/8	15.88	5/8	15.88		5	MF-SC233	£0.85
						25	MF-SC233/25	£3.50
4-40	3/4	19	3/4	19		5	MF-SC234	£0.85
						25	MF-SC234/25	£3.50
4-40	1	25.4	3/4	19		5	MF-SC235	£0.85
						25	MF-SC235/25	£3.50
4-40 (2mm socket version)	1	25.4	3/4	19		5	MF-SC235SH	£0.85
						25	MF-SC235SH/25	£3.50
4-40	1 1/4	31.8	1	25.4		5	MF-SC236	£1.25
						25	MF-SC236/25	£5.00
4-40	1 1/2	38.1	3/4	19		5	MF-SC237	£1.35
						25	MF-SC237/25	£5.50
4-40	1 3/4	44.5	3/4	19		2	MF-SC239	£1.00
						10	MF-SC239/10	£4.00
4-40	2	50.8	3/4	19		2	MF-SC238	£1.50
						10	MF-SC238/10	£6.10
Driving Tools for 4 - 40 UNC Socket Cap Screws (for 2mm A/F socket versions use tools from 3 unc above)
2.4mm (3/32) Hex/Allen Key							MF-HK-24	£0.60
2.4mm (3/32") Hex/Ball Driver							MF-BD-66	£3.25
2.4mm (3/32") T Handle Driver							MF-TH-332	£4.95

Popular ancillary items often ordered with 4 UNC Steel Socket Cap Screws
	Description	Pack Qty	Pack Price				Description	Pack Qty	Pack Price
	4UNC Steel BZP Hex Nuts	10	£0.60				*M3 Steel BZP Flat Washers	20	£0.60
	4UNC Steel BZP Nyloc Nuts	10	£0.70				*M3 Steel BZP Spring Washers	20	£0.50
To see our full range of nuts and/or order larger quantities, please click here						To see our full range of washers and/or order larger quantities, please click here
						*M3 washers are suitable for use with 4 UNC screws

5 UNC	Please scroll down to the bottom of this 5 UNC section for related tools and ancillary items
Thread	Overall Length L		Thread Length TL (Approx)		Socket size	Pack Qty	MF Ref	Pack Price	You can enter/change the number of items on the order form
	Inches	mm	Inches	mm	A/F
	Where L and TL values are equal, the shank is fully threaded				mm
5-40	1/4	6.35	1/4	6.35		5	MF-SC260	£1.00
5-40	3/8	9.53	3/8	9.53		5	MF-SC261	£1.20
5-40	1/2	12.7	1/2	12.7		5	MF-SC262	£1.40
5-40	5/8	15.9	5/8	15.9		5	MF-SC263	£1.40
5-40	3/4	19	3/4	19		5	MF-SC264	£1.50
5-40	1	25.4	1	25.4		5	MF-SC265	£1.60
5-40	1 1/4	31.8	3/4	19		5	MF-SC266	£1.60
5-40	1 1/2	38.1	3/4	19		5	MF-SC267	£1.70
	Sorry - this item is temporarily out of stock
5-40	1 3/4	44.5	1	25.4		5	MF-SC268	£1.80
5-40	2	50.8	3/4	19		5	MF-SC269	£1.80
Driving Tools for 5 - 40 UNC Socket Cap Screws
2.4mm (3/32) Hex/Allen Key							MF-HK-24	£0.60
2.4mm (3/32") Hex/Ball Driver							MF-BD-66	£3.25
2.4mm (3/32") T Handle Driver							MF-TH-332	£4.95

Popular ancillary items often ordered with 5 UNC Steel Socket Cap Screws
	Description	Pack Qty	Pack Price				Description	Pack Qty	Pack Price
	5 UNC Steel BZP Hex Nuts	10	£1.30				M3* Steel BZP Flat Washers	20	£0.60
	5 UNC Steel BZP Nyloc Nuts	10	£1.30				M3* Steel BZP Spring Washers	20	£0.50
To see our full range of nuts and/or order larger quantities, please click here						To see our full range of washers and/or order larger quantities, please click here
						*M3 washers are suitable for use with 5 UNC screws

6 UNC	Please scroll down to the bottom of this 6 UNC section for for related ancillaries and tools
Thread	Overall Length L		Thread Length TL (Approx)		Socket size	Pack Qty	MF Ref	Pack Price	You can enter/change the number of items on the order form
	Inches	mm	Inches	mm	A/F
	Where L and TL values are equal, the shank is fully threaded				mm

6-32	1/4	6.35	1/4	6.35		5	MF-SC240	£0.85
						25	MF-SC240/25	£3.50
6-32	3/8	9.53	3/8	9.53		5	MF-SC241	£0.85
						25	MF-SC241/25	£3.50
6-32	1/2	12.7	1/2	12.7		5	MF-SC242	£0.85
						25	MF-SC242/25	£3.50
6-32	5/8	15.88	5/8	15.88		5	MF-SC243	£0.85
						25	MF-SC243/25	£3.50
6-32	3/4	19	3/4	19		5	MF-SC244	£0.85
						25	MF-SC244/25	£3.50
6-32	1	25.4	1	25.4		5	MF-SC245	£0.85
						25	MF-SC245/25	£3.50
6-32	1 1/4	31.8	7/8	22.2		5	MF-SC246	£1.00
						25	MF-SC246/25	£4.00
6-32	1 1/2	38.1	7/8	22.2		5	MF-SC247	£1.15
						25	MF-SC247/25	£4.50
6-32	2	50.8	1	25.4		2	MF-SC248	£1.15
						10	MF-SC248/10	£4.50
Sorry - this item is temporarily out of stock
6-32	2 1/4	57.1	1	25.4		2	MF-SC249	£1.30
						10	MF-SC249/10	£5.10
6-32	2 1/2	63.5	1	25.4		2	MF-SC250	£1.55
						10	MF-SC250/10	£6.60
6-32	3	76.2	1	25.4		2	MF-SC251	£1.90
						10	MF-SC251/10	£7.50
Driving Tools for 6 - 32 UNC Socket Cap Screws
2.8mm (7/64") Hex/Allen Key							MF-HK-28	£0.60
2.8mm (7/64") Hex/Ball Driver							MF-BD-68	£3.45
2.8mm (7/64") T Handle Driver							MF-TH-764	£4.95

Popular ancillary items often ordered with 6 UNC Steel Socket Cap Screws
	Description	Pack Qty	Pack Price				Description	Pack Qty	Pack Price
	6UNC Steel BZP Hex Nuts	10	£0.60				*M3.5 St/Steel Flat Washers	20	£0.80
	6UNC Steel BZP Nyloc Nuts	10	£0.70				*M3.5 St/Steel Spring Washers	20	£0.50
To see our full range of nuts and/or order larger quantities, please click here						To see our full range of washers and/or order larger quantities, please click here
						*M3.5 washers are suitable for use with 6 UNC screws

8 UNC	Please scroll down to the bottom of this 8 UNC section for related tools and ancillary items
Thread	Overall Length L		Thread Length TL (Approx)		Socket size	Pack Qty	MF Ref	Pack Price	You can enter/change the number of items on the order form
	Inches	mm	Inches	mm	A/F
	Where L and TL values are equal, the shank is fully threaded				mm
8-32	1/4	6.35	1/4	6.35		5	MF-SC814	£0.85
8-32	3/8	9.5	3/8	9.5		5	MF-SC838	£0.85
8-32	1/2	12.7	1/2	12.7		5	MF-SC252	£0.85
8-32	5/8	15.9	5/8	15.9		5	MF-SC253	£0.85
8-32	3/4	19	3/4	19		5	MF-SC254	£0.85
8-32	1	25.4	1	25.4		5	MF-SC255	£0.85
8-32	1 1/4	31.8	1	25.4		5	MF-SC256	£0.85
8-32	1 1/2	38	1	25.4		5	MF-SC257	£0.85
8-32	2	50.8	1	25.4		5	MF-SC258	£1.40
8-32	2 1/2	63.5	1	25.4		5	MF-SC259	£2.00
8-32	3	76	1	25.4		5	MF-SC259-2	£2.25
Driving Tools for 8 - 32 UNC Socket Cap Screws
3.6mm (9/64") Hex/Allen Key							MF-HK-36	£0.60
3.6mm (9/64") Hex/Ball Driver							MF-BD-70	£3.45
3.6mm (9/64") T Handle Driver							MF-TH-964	£4.95

Popular ancillary items often ordered with 8 UNC Steel Socket Cap Screws
	Description	Pack Qty	Pack Price				Description	Pack Qty	Pack Price
	8 UNC Steel BZP Hex Nuts	10	£0.70				M4* Steel BZP Flat Washers	20	£0.60
	8 UNC Steel BZP Nyloc Nuts	10	£0.80				M4* Steel BZP Spring Washers	20	£0.50
To see our full range of nuts and/or order larger quantities, please click here						To see our full range of washers and/or order larger quantities, please click here
						*M4 washers are suitable for use with 8 UNC screws

10 UNC	Please scroll down to the bottom of this 10 UNC section for for related ancillaries and tools
Thread	Overall Length L		Thread Length TL (Approx)		Socket size	Pack Qty	MF Ref	Pack Price	You can enter/change the number of items on the order form
	Inches	mm	Inches	mm	A/F
	Where L and TL values are equal, the shank is fully threaded				mm

10-24	1/2	12.7	1/2	12.7		5	MF-SC210	£0.85
10-24	3/4	19	3/4	19		5	MF-SC211	£0.85
10-24	1	25.4	1	25.4		5	MF-SC213	£0.85
10-24	1 1/2	38.1	1 1/8	28.5		2	MF-SC215	£0.85
10-24	2	50.8	1 1/8	28.5		2	MF-SC217	£1.00
10-24	2 1/4	57.1	1 1/8	28.5		2	MF-SC218	£1.00
Driving Tools for 10 - 24 UNC Socket Cap Screws
4mm (5/32") Hex/Allen Key							MF-HK-40	£0.60
4mm (5/32") Hex/Ball Driver							MF-BD-72	£3.65
4mm (5/32") T Handle Driver							MF-TH-532	£4.95
4mm Swivel Wrench							MF-BSHW4	£8.25

Popular ancillary items often ordered with 10 UNC Steel Socket Cap Screws
	Description	Pack Qty	Pack Price				Description	Pack Qty	Pack Price
	10UNC Steel BZP Hex Nuts	10	£0.70				*M5 St/Steel Flat Washers	20	£0.60
	10UNC Steel BZP Nyloc Nuts	10	£0.80				*M5 St/Steel Spring Washers	20	£0.60
To see our full range of nuts and/or order larger quantities, please click here						To see our full range of washers and/or order larger quantities, please click here
						*M5 washers are suitable for use with 10 UNC screws

1/4" UNC	Please scroll down to the bottom of this 1/4" UNC section for related tools and ancillary items
Thread	Overall Length L		Thread Length TL (Approx)		Socket size	Pack Qty	MF Ref	Pack Price	You can enter/change the number of items on the order form
	Inches	mm	Inches	mm	A/F
	Where L and TL values are equal, the shank is fully threaded				mm
1/4"-20	3/8	9.5	3/8	9.5		4	MF-SC286	£0.95
1/4"-20	1/2	12.7	1/2	12.7		4	MF-SC287	£0.95
1/4"-20	3/4	19	3/4	19		4	MF-SC289	£0.95
1/4"-20	1	25.4	1	25.4		4	MF-SC291	£0.95
1/4"-20	1 1/4	31.8	1 1/4	31.8		4	MF-SC292	£0.95
1/4"-20	1 1/2	38.1	1	25.4		4	MF-SC293	£0.95
1/4"-20	2	50.8	1	25.4		4	MF-SC295	£1.15
1/4"-20	2 1/4	57.1	1	25.4		4	MF-SC296	£1.15
1/4"-20	2 1/2	63.5	1	25.4		4	MF-SC297	£1.25
1/4"-20	2 3/4	70	1	25.4		4	MF-SC298	£1.25
Driving Tools for 1/4 - 20 UNC Socket Cap Screws
4.75mm (3/16") Hex/Allen Key							MF-HK-475	£0.60
4.75mm (3/16") T Handle Driver							MF-TH-316	£5.65

Popular ancillary items often ordered with 1/4 UNC Steel Socket Cap Screws
	Description	Pack Qty	Pack Price				Description	Pack Qty	Pack Price
	1/4 UNC Steel BZP Hex Nuts	10	£0.80				M6* Steel BZP Flat Washers	20	£0.60
	1/4 UNC Steel BZP Nyloc Nuts	10	£1.00				M6* Steel BZP Spring Washers	20	£0.60
To see our full range of nuts and/or order larger quantities, please click here						To see our full range of washers and/or order larger quantities, please click here
						*M6 washers are suitable for use with 1/4 UNC screws