1 x Machine Screw Socket Head 1/4X 1"3/4 Unc Or Bsw British Standard Whitworth Stainless Steel A2

1 x Machine Screw Socket Head 1/4X 1"3/4 Unc Or...

1 x Machine Screw Socket Head 1/4X 1"3/4 Unc Or Bsw British Standard Whitworth Stainless Steel A2

Name: 1 x Machine Screw Socket Head 1/4X 1"3/4 Unc Or Bsw British Standard Whitworth Stainless Steel A2
Brand: Screw Express
SKU: 8604064418
Price: 3.04 GBP
Availability: InStock

Reference 8604064418_1

In stock 217 Pièces

£3.04 Incl VAT

Decreasing prices by quantity

Number of pieces	1	10	30	100
Lot price VAT included	£3.04	£6.12	£15.88	£52.80

Machine Screw Socket Head 1/4X 1"3/4 Unc Or Bsw British Standard Whitworth Stainless Steel A21 inch = 25.4mm

Packaging

1 unit
10 units
30 units
100 units

Correspondence table inches and mm

Product Details

Diameter: 1/4
Length

Length

How do I measure the length of a screw?

The length of a countersunk screw is measured with the head. For all other heads, the length is measured under the head.: 1 3/4" 444.45
Thread: Metal
Drive Type: Socket Cap
Pitch: Pitch Unc EQUIVALENT BSW
Material: Stainless Steel Stainless Steel A2
COLOR: Grey
Product Family: Screw AMERICANS
Sub product family: Head Socket Head BTR
Number of threads per inch

Number of threads per inch

How to determine the diameter of a UNC or UNF screw:

The number of threads per inch will determine the diameter of the screw or nut of an American UNC or UNF screw.

Simply count the number of threads per inch (i.e. 25.4 mm) and refer to the table below.

For diameter 1 inch: 8 threads for 1 inch (25.4 mm) = UNC THREAD

Ø in inches

Ø in mm

Number of threads/inch in UNC

Number of threads/inch in UNF (fine pitch)

N°0

1.524

80

N°1

1.854

64

72

N°2

2.184

56

64

N°3

2.515

48

56

N°4

2.845

40

48

N°5

3.175

40

44

N°6

3.505

32

40

N°8

4.166

32

36

N°10

4.826

24

32

N°12

5.486

24

28

1/4

6.35

20

28

5/16

7.938

18

24

3/8

9.525

16

24

7/16

11.113

14

20

1/2

12.7

13

20

9/16

14.288

12

18

5/8

15.875

11

18

3/4

19.05

10

16

7/8

22.225

9

14

1”

25.4

8

14

1”1/8

28.575

7

12

1”1/4

31.75

7

12

1“1/2

38.1

6

12

1”3/4

44.45

5

-: 20
Diameter in mm: 6.35
Unit weight: 11.64 GR

In stock 217 Items

ean13 3663072169968

Description

Machine Screw Socket Head 1/4X 1"3/4 Unc Or Bsw British Standard Whitworth Stainless Steel A2 Other Reference : 3617500545749 3663072169968

Use Cases

Laurent B. (vis-express.fr)
2025-06-01

Screw for Intersport bike saddle

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Inches	mm	Inches	mm
1/8	3,2	2"1/4	57
3/16	4,8	2"1/2	64
1/4	6,3	2"3/4	70
5/16	8	3"	76
3/8	9,5	3"1/4	83
7/16	11	3"1/2	89
1/2	13	4"	102
5/8	16	4"1/2	114
3/4	19	5"	127
7/8	22	5"1/2	140
1"	25	6"	152
1"1/4	32	6"1/2	165
1"1/2	38	7"	178
1"3/4	45	8"	203
2"	51	9"	229
		10"	254

Ø in inches	Ø in mm	Number of threads/inch in UNC	Number of threads/inch in UNF (fine pitch)
N°0	1.524		80
N°1	1.854	64	72
N°2	2.184	56	64
N°3	2.515	48	56
N°4	2.845	40	48
N°5	3.175	40	44
N°6	3.505	32	40
N°8	4.166	32	36
N°10	4.826	24	32
N°12	5.486	24	28
1/4	6.35	20	28
5/16	7.938	18	24
3/8	9.525	16	24
7/16	11.113	14	20
1/2	12.7	13	20
9/16	14.288	12	18
5/8	15.875	11	18
3/4	19.05	10	16
7/8	22.225	9	14
1”	25.4	8	14
1”1/8	28.575	7	12
1”1/4	31.75	7	12
1“1/2	38.1	6	12
1”3/4	44.45	5	-