Round Head Rivets

The solid rivet is the most widely used mechanical fastener in construction and manufacturing assembly. It offers the user these advantages:

Its cost is low

It allows high rate of production with minimal investment in machinery.

It facilitates joining different materials of differing thicknesses.

It has high shear strength.

It is consistently applied by unskilled labour.

It provides a tamper-resistant permanent joint.

It is versatile - can be structural yet decorative.

A typical application for solid rivets would be within the structural parts of aircraft. Hundreds of thousands of solid rivets are used to put together the frame of a modern aeroplane. Such solid rivets come with rounded (universal) or countersunk heads. Typical aircraft rivets are composed of aluminum alloys, titanium, and nickel-based alloys.

The setting of solid rivet fasteners requires access from both sides of the structures. Solid rivets are driven using hydraulically driven squeezing tools or even handheld hammers. When only one side is available, blind rivets are more appropriate tools.

ROUND HEAD RIVET DIMENSIONS - BS275: 1927 TABLE 2, FIGURE 3 - SNAP HEAD

Round Head Rivets - BS275:1927 Table 2, Figure 3

Head Diameter A=1.6D, Head Depth B=0.7D, Setting Allowance S=1.125D

Nominal Diameter (D)	Shank Diameter			Head Diameter A=1.6D	Head Depth B=0.7D	Setting Allowance S=1.125D
Nominal Diameter (D)		Tolerance		Head Diameter A=1.6D	Head Depth B=0.7D	Setting Allowance S=1.125D
1/2	0.5	0.484	0.531	0.8	0.35	0.563
9/16	0.563	0.547	0.594	0.9	0.394	0.633
5/8	0.625	0.609	0.656	1	0.438	0.703
11/16	0.688	0.672	0.719	1.1	0.481	0.773
3/4	0.75	0.734	0.781	1.2	0.525	0.844
13/16	0.813	0.797	0.844	1.3	0.569	0.914
7/8	0.875	0.859	0.906	1.4	0.613	0.984
15/16	0.938	0.922	0.969	1.5	0.656	1.055
1	1	0.984	1.031	1.6	0.7	1.125
1 1/16	1.063	1.047	1.094	1.7	0.744	1.195
1 1/8	1.125	1.109	1.156	1.8	0.788	1.266
1 3/16	1.188	1.172	1.219	1.9	0.831	1.336
1 1/4	1.25	1.234	1.281	2	0.875	1.406
1 5/16	1.313	1.297	1.344	2.1	0.919	1.477
1 3/8	1.375	1.359	1.406	2.2	0.963	1.547
1 7/16	1.438	1.422	1.469	2.3	1.006	1.617
1 1/2	1.5	1.484	1.531	2.4	1.05	1.688
1 9/16	1.563	1.547	1.594	2.5	1.094	1.758
1 5/8	1.625	1.609	1.656	2.6	1.138	1.828
1 11/16	1.688	1.672	1.719	2.7	1.181	1.898
1 3/4	1.75	1.734	1.781	2.8	1.225	1.969

The British Standard does not specify tolerances for Head Diameter, Depth or Shank Length. It is normal to have a radius under the head, but no dimensions are specified.

ROUND HEAD RIVET DIMENSIONS - BS641: 1951 TABLE 1 - SNAP OR ROUND HEAD

Head Diameter A=1.75D, Head Depth B=0.75D, Setting Allowance S=1.429D

Nominal Diameter (D)	Shank Diameter			Head Diameter A=1.75D	Head Depth B=0.75D	Setting Allowance S=1.429D
Nominal Diameter (D)		Tolerance		Head Diameter A=1.75D	Head Depth B=0.75D	Setting Allowance S=1.429D
1/32*	0.031	0.027	0.033	0.055	0.023	0.045
3/64*	0.047	0.043	0.049	0.082	0.035	0.067
1/16*	0.063	0.059	0.065	0.109	0.047	0.089
5/64*	0.078	0.074	0.080	0.137	0.059	0.112
3/32	0.094	0.090	0.096	0.164	0.07	0.134
7/64*	0.109	0.105	0.111	0.191	0.082	0.156
1/8*	0.125	0.121	0.127	0.219	0.094	0.179
9/64*	0.141	0.137	0.143	0.246	0.106	0.201
5/32	0.156	0.152	0.158	0.273	0.117	0.223
3/16	0.188	0.184	0.190	0.328	0.141	0.268
7/32*	0.219	0.214	0.222	0.383	0.164	0.313
1/4	0.25	0.245	0.253	0.438	0.188	0.357
9/32*	0.281	0.276	0.284	0.492	0.211	0.402
5/16	0.313	0.307	0.317	0.547	0.234	0.447
3/8	0.375	0.367	0.379	0.656	0.281	0.536
7/16	0.438	0.429	0.443	0.766	0.328	0.625

The British Standard does not specify tolerances for Head Diameter, Depth & Radius or Shank Length. It is normal to have a radius under the head, but no dimensions are specified. *These Diameters are not specifically denoted in BS 641 Table 1.

ROUND HEAD RIVET DIMENSIONS - BS4620: 1970 TABLE 1 - SNAP OR ROUND HEAD

Head Diameter A=1.75D, Head Depth B=0.6D, Setting Allowance S=1.063D

Nominal Diameter (D)	Shank Diameter Tolerance		Head Diameter			Head Depth			Length Tolerance	Setting Allowance S=1.063D
Nominal Diameter (D)	Min	Max	Nominal A=1.75D	Tol. Min	Tol. Max	Nominal B=0.6D	Tol. Min	Tol. Max	Length Tolerance	Setting Allowance S=1.063D
1	0.93	1.07	1.8	1.60	2.00	0.6	0.60	0.80	0.5	1.06
1.2	1.13	1.27	2.1	1.90	2.30	0.7	0.70	0.90	0.5	1.28
1.6	1.53	1.67	2.8	2.60	3.00	1.0	1.00	1.20	0.5	1.70
2	1.93	2.07	3.5	3.26	3.74	1.2	1.20	1.44	0.5	2.13
2.5	2.43	2.57	4.4	4.16	4.64	1.5	1.50	1.74	0.5	2.66
3	2.93	3.07	5.3	5.06	5.54	1.8	1.80	2.04	0.5	3.19
3.5	3.41	3.59	6.1	5.81	6.39	2.1	2.10	2.39	0.5	3.72
4	3.91	4.09	7	6.71	7.29	2.4	2.40	2.69	0.5	4.25
5	4.91	5.09	8.8	8.51	9.09	3.0	3.00	3.29	0.5	5.32
6	5.91	6.09	10.5	10.15	10.85	3.6	3.60	3.95	0.8	6.38
7	6.89	7.11	12.3	11.95	12.65	4.2	4.20	4.55	0.8	7.44
8	7.89	8.11	14.0	13.65	14.35	4.8	4.50	5.15	0.8	8.50
10	9.89	10.11	18.0	17.58	18.42	6.0	6.00	6.42	0.8	10.63
12	11.86	12.14	21.0	20.58	21.42	7.2	7.02	7.62	0.8	12.76
14	13.86	14.14	25.0	24.58	25.42	8.4	8.40	8.82	0.8	14.88
16	15.86	16.14	28.0	27.58	28.42	9.6	9.60	10.02	1	17.01

There is no negative tolerance on Head Depth and Shank Length. It is normal to have a radius under the head, but no dimensions are specified.

ROUND HEAD RIVET DIMENSIONS - DIN 124

Head Diameter A=1.6D, Head Depth B=0.65D, Setting Allowance S=1.015D

Nominal Diameter (D)	Shank Diameter Tolerance		Head Diameter			Head Depth			Setting Allowance S=1.015D
Nominal Diameter (D)	Min	Max	Nominal A=1.6D	Tol. Min	Tol. Max	Nominal B=0.65D	Tol. Min	Tol. Max	Setting Allowance S=1.015D
10	9.4	10.2	16	14.9	16.0	6.5	6.5	7.4	10.15
12	11.3	12.2	19	17.7	19.0	7.5	7.5	8.4	12.18
14	13.2	14.2	22	20.7	22.0	9	9.0	9.9	14.21
16	15.2	16.2	25	23.7	25.0	10.0	10.0	10.9	16.24
18	17.1	18.2	28	26.7	28.0	11.5	11.5	12.6	18.27
20	19.1	20.2	32	30.4	32.0	13.0	13.0	14.1	20.3
22	20.9	22.3	36	34.4	36.0	14.0	14.0	15.1	22.33
24	22.9	24.3	40	38.4	40.0	16.0	16.0	17.1	24.36
25*	23.8	25.3	40	38.4	40.0	16.0	16.0	17.1	25.38
27	25.8	27.3	43	41.4	43.0	17.0	17.0	18.1	27.41
30	28.6	30.3	46	44.6	46.0	19.0	19.0	20.3	30.45
33	31.6	33.6	51	49.1	51.0	21.0	21.0	22.1	33.5
36	33.6	36.4	56	51.6	58.0	23.0	23.0	24.3	36.54

There is no negative tolerance on Head Depth and Shank Length. There is a positive tolerance on Head Diameter. DIN 124 is the same as BS 4620 Table 2, but with differing tolerances. *This Diameter is not specifically denoted in DIN 124.

ROUND HEAD RIVET DIMENSIONS - DIN 660

Head Diameter A=1.75D, Head Depth B=0.6D, Setting Allowance S=1.063D

Nominal Diameter (D)	Shank Diameter Tolerance		Head Diameter			Head Depth			Setting Allowance S=1.063D
Nominal Diameter (D)	Min	Max	Nominal A=1.75D	Tol. Min	Tol. Max	Nominal B=0.6D	Tol. Min	Tol. Max	Setting Allowance S=1.063D
1	0.93	1.05	1.8	1.55	1.80	0.6	0.48	0.73	1.06
1.2	1.13	1.25	2.1	1.85	2.10	0.7	0.58	0.83	1.28
1.4	1.33	1.45	2.4	2.15	2.40	0.8	0.68	0.93	1.49
1.6	1.52	1.65	2.8	2.55	2.80	1.0	0.88	1.13	1.70
2	1.87	2.10	3.5	3.20	3.50	1.2	1.08	1.33	2.13
2.5	2.37	2.60	4.4	4.10	4.50	1.5	1.38	1.63	2.66
3	2.87	3.10	5.2	4.90	5.20	1.8	1.68	1.93	3.19
3.5	3.37	3.60	6.2	5.62	6.20	2.1	1.98	2.53	3.72
4	3.87	4.10	7	6.42	7.00	2.4	2.28	2.53	4.25
5	4.82	5.15	8.8	8.22	8.80	3.0	2.88	3.13	5.32
6	5.82	6.15	10.5	9.80	10.50	3.6	3.45	3.75	6.38
7	6.82	7.15	12.2	11.20	12.20	4.2	4.05	4.45	7.44
8	7.76	8.20	14.0	13.30	14.00	4.8	4.65	4.95	8.50

There is no positive tolerance on Head Diameter and no negative tolerance on Shank Length. Shank Length has a positive tolerance according to IT14 from ISO 286-2 (+0.25 to +0.62 depending on actual length). It is normal to have a radius under the head. DIN 660 is the same as BS 4620 Table 1, but with differing tolerances.

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