Grey Bar

Projection Weld Bolts

Projection Weld Bolts and Studs are available with a range of head styles with either weld pipes or an annular weld ring positioned either under the head or on top of the head.

Projection Weld Bolts Materials & Finishes
Weld bold bolts are available in standard Mild Steels or Carbon Steels with Boron suitably heat treated for higher tensile requirements. Various finishes can be added from the standard self colour, to copper or zinc plate.

Applications
Used in sheet material to provide secure fastenings in applications where access is only available from one side. Used mainly in the automotive industry for light or heavy duty applications.

Stock Sizes
M4 to M16 Dimensions to BS.7670 in metric and imperial sizes to suit your requirements.

ISO Metric - Threaded

Thread / Length 8 10 12 16 20 25 30 35 40 50 60
M4 x x x x x x x x - - -
M5 x x x x x x x x x - -
M6 - x x x x x x x x - -
M8 - - - x x x x x x x -
M10 - - - - x x x x x x x

Design Specification
For more detailed product specifications.
BS.767. Refers. - Drawing
Drg. Ref.
Dimension
 Thread Size
Pitch
M4
M5
M6
M8
M10
M12
M16
0.70
0.80
1.00
1.25
1.50
1.75
2.00
A
Head Diameter
Min
Max           
7.55
8.45
9.55 10.45
11.45
12.55
15.45 16.55
19.35 20.65
23.35 24.65
33.00 34.00
B
Head Depth
Min           Max
1.47 1.72
1.87 2.12
2.27 2.52
3.05 3.35
3.85 4.15
4.65 4.95
4.00 4.50
C
Weld Pip Diameter
Min           Max
1.20 1.45
1.50 1.75
1.80 2.05
2.40 2.65
3.00 3.20
3.60 3.90
3.75 4.25
D
Weld Pip Depth
Min           Max
0.50 0.70
0.65 0.85
0.80 1.00
1.10 1.30
1.40 1.60
1.70 1.90
1.75 2.25
E
Pitch Circle Diameter
Min           Max
6.00 6.48
7.50 8.00
9.00 9.58
12.00 12.70
15.00 15.70
18.00 18.70
23.75 24.25
F
Under Head Radius
Max
0.40
0.50
0.60
0.80
0.80
0.80
1.0

Length dimensions of standard Projection Weld Bolts
Nom. Length Length Tolerance
5.00/9.00 +/- 0.42mm
10.00/19.00 +/- 0.35mm
20.00/34.00 +/- 0.42mm
35.00/100.00 +/- 0.50mm

Specials
Our manufacturing plant is capable of producing weld bolts to your drawings, in non standard lengths, as well as to other National or European Standards and stocking them for your call off instructions. Optical sorting can also be carried out if requested.

Packing Quantity
The weld bolts are normally packed into polypropylene bags ready for immediate dispatch. However they can be supplied in boxes if this is indicated at the time of order.
ISO METRIC - THREADED
Length / Thread M4 M5 M6 M8 M10
8 10,000 5,000 - - -
10 10,000 5,000 3,000 - -
12 5,000 5,000 3,000 - -
16 5,000 5,000 2,500 1,000 -
20 5,000 4,000 2,000 1,000 500
25 5,000 3,000 2,000 1,000 500
30 5,000 3,000 2,000 1,000 500
35 - 2,500 2,000 1,000 500
40 - 2,500 2,000 1,000 500
45 - - - 500 500
50 - - - 500 500
55 - - - - 400
60 - - - - 400