GOST 10304-80 Rivets of Accuracy Classes B and C

GOST 10304-80 (ST SEV 1329-78) applies to general engineering rivets of accuracy classes B and C, designed for operation at temperatures from plus 300 to minus 60°C.

RIVETS classes B and C. General specifications Rivets classes B and C. General specifications	GOST 10304-80* (ST SEV 1329-78) Supersedes GOST 10304-68

1. TECHNICAL REQUIREMENTS

1.1. In terms of shape, dimensions, and limit deviations not specified in this standard, rivets shall comply with the specification standards.

1.2. The designation scheme for rivets is given in the mandatory appendix.

1.3. Material grades and their designations shall comply with those specified in Table 1.

Table 1

Material
Type	Grade	Standard designation	Grade (group) designation
Carbon steels	St2*		00
	10*, 10kp	GOST 1050-88 GOST 5663-79 or GOST 10702-78	01
	St3*	GOST 14085-79 or GOST 499-70	02
	15*, 15kp	GOST 1050-74 GOST 5663-79 or GOST 10702-78	03
Low-alloy steel	09G2	GOST 19281-73	10
Corrosion-resistant steels	12Kh18N9T, 12Kh18N10T	GOST 5632-72 GOST 5949-75	21
Brass	L63	GOST 12920-67 GOST 15527-70	32
	L63 (non-magnetic)		33
Copper	M3	GOST 859-78 GOST 1535-71	38
	MT	GOST 2112-79
Aluminium alloys	AMg5P	GOST 14838-78	31
	D18	GOST 4784-74	36
	AD1		37

• Information on materials is given in reference appendix 2.

Other materials with tensile strength not lower than that specified in Table 2 are permitted.

1.3a. Rivets shall be manufactured with or without coatings. Coating types and their designations are per GOST 1759.0-87. The coating thickness shall be selected per GOST 9.303-84.

1.4. Technical requirements for coatings are per GOST 9.301-86.

1.5. The shear tensile strength of rivets shall comply with that specified in Table 2.

Table 2

Rivet material		Type of heat treatment	Shear tensile strength, MPa (kgf/mm²), not less than
Designation	Grade
Steel	St2, St3	Annealing	250 (25)
	10, 15		250 (25)
	10kp, 15kp		250 (25)
	09G2	Without heat treatment	380 (38)
	12Kh18N9T, 12Kh18N10T	Quenching	430 (43)
Brass	L63	Annealing	-
	L63 (non-magnetic)
Copper	M3, MT		190 (19)
Aluminium alloys	AMg5P	Without heat treatment	160 (16)
	AD1		60 (6)
	D18	Quenching and natural aging	190 (19)

1.6. Rivets may be manufactured without heat treatment.

1.7. The rivet shall withstand a cold-state test for the strength of the head-to-shank connection. Bending of the head relative to the shank through an angle of 15° shall occur without the formation of transverse cracks.

1.8. The end of the shank or of the metal prepared for rivet manufacture shall withstand a riveting (upsetting) test without cracks or tears forming in the head produced. Rivets manufactured by cold heading and heat-treated rivets need not be subjected to the riveting test.

1.9. The surface of rivets shall be clean, free from flash, cracks, tears, material delamination, blisters, cavities, and loose scale.

The surface may have:

surface defects permitted by the standards for the wire and rod from which rivets are made, including defects altered as a result of material deformation during heading. The depth of altered defects on the heads shall not exceed 0.2 mm;

tool marks and folds within the permissible dimensional deviations of rivets;

burrs on the head, if their size does not exceed half the tolerance range for the rivet head diameter; for rivets with a shank diameter d > 16 mm, burrs on the heads not exceeding 1 mm; non-removable colored oxide film.

1.9a. The surface roughness of rivets shall not exceed:

Ra = 6.3 µm for accuracy class B,

Ra = 50 µm for accuracy class C.

The surface roughness of rivets manufactured by cold heading and the roughness of the shank end face are not controlled.

1.10. Tolerance ranges and limit deviations of rivet dimensions shall comply with those specified in Table 3.

Table 3

Parameter name	Tolerance ranges and limit deviations
	Accuracy class B	Accuracy class C
Shank diameter d	jsl4	jsl5
Head diameter D	jsl5	jsl6
Rivet length L
Head height H > 1 mm	jsl6

1.11. Permissible deviations in the shape and location of surfaces shall not exceed the following values: oblique cut of the shank (Fig. 1):

α = 3° for diameters from 1 to 16 mm; α = 5° for diameters over 16 mm;

perpendicularity tolerance of the bearing and end surfaces of the heads relative to the shank axis (Fig. 1) t; t = 0.0175D for product grade B and t = 0.0349D for product grade C;

Fig. 1

height of the cylindrical land b and underfill at the head top in the form of flat areas D₁ (Fig. 2) — according to Table 4.

Fig. 2

Table 4

mm

D	Up to 3	Over 3 to 6	Over 6 to 10	Over 13	Over 18 to 30	Over 30 to 50	Over 50
b, max	0.3	0.4	0.6	1.5	2.0	2.5	3.0
D₁, max	0.5D			0.6D

For rivets with a shank diameter up to 6 mm, by agreement between the manufacturer and the customer, the b values specified in Table 4 may be increased by 0.1 mm;

concentricity tolerance of the head axis relative to the shank axis (Fig. 2) — according to Table 5.

Table 5

mm

d	From 1 to 1.6	Over 1.6 to 2.5	Over 2.5 to 5	Over 5 to 8	Over 8 to 18	Over 18 to 24	Over 24 to 36
a	0.2	0.32	0.4	0.6	1.0	2.0	3.0

reduction of shank diameter, measured at a distance equal to the shank diameter from the rivet end — according to Table 6.

Table 6

mm

d	From 1 to 10	Over 10 to 13	Over 13 to 18	Over 18 to 30	Over 30 to 36
Reduction of shank end diameter	Within the lower deviation	-0.7	-0.8	-1.0	-1.4

2. ACCEPTANCE

2.1. Rivet acceptance rules — according to GOST 17769-83.

2.2. Each batch of rivets must be accompanied by a quality document indicating:

the name or trademark of the manufacturer;

the designation of the rivets;

the list and results of the tests performed;

the net weight of the batch;

means of temporary corrosion protection and the protection period.

Note. The quality document for the rivets may be placed inside the packaging or container, provided that its integrity is ensured during transportation.

3. INSPECTION AND TEST METHODS

3.1. Inspection of the mechanical properties of rivets shall be performed for compliance with the requirements of Table 2.

3.2. Coating quality inspection — according to GOST 9.302-79.

3.3. The appearance of rivets (clause 1.9) shall be checked visually without the use of magnifying instruments.

For rivets with a diameter of less than 3 mm, the use of magnifying devices (up to 3×) is permitted.

3.4. Surface roughness shall be checked by comparison with roughness specimens according to GOST 9378-75 or by means of instruments.

The surface roughness of rivets produced by cold heading is not inspected.

3.5. Deviations in dimensions and surface location of rivets shall be checked using limit gauges, templates, control dies, universal measuring instruments or tools.

The length of rivets with an angled end cut shall be checked along the short side of the shank.

3.6. The height of flat countersunk and raised countersunk rivet heads shall be checked using a control die and a template according to the scheme shown in Fig. 3.

The height H of raised countersunk rivet heads is checked by the dimension (H+h) with a tolerance equal in magnitude to the tolerance for dimension H, Fig. 4.

Other methods of checking head height are permitted.

Fig. 3

Fig. 4

3.7. The deviation from perpendicularity of the head bearing surface to the shank axis shall be checked with an angular template or a feeler gauge, by the gap between the head bearing surface and the end surface of the control die.

3.8. The straightness of the rivet shank shall be checked by the free entry of the rivet into a control die whose hole diameter corresponds to the maximum shank diameter of the rivet.

The tolerance zone of the die hole is H14.

3.9. The deviation from concentricity of the head relative to the rivet shank is determined by the difference between dimensions s and s₁ (Fig. 5), measured using a vernier depth gauge or a micrometer depth gauge. Other inspection methods are permitted.

3.10. The values of the angle and fillet radius of the flat head, the radius under the head, the perpendicularity of the head bearing and end surfaces to the shank axis, the straightness of the shank, the angled end cut of the shank, and the concentricity of the head relative to the shank axis need not be checked on finished rivets, provided these geometric parameters are ensured by the tooling.

Fig. 5

Fig. 6

3.11. The strength of the head-to-shank joint shall be tested in a control die according to the scheme shown in Fig. 6, by striking the rivet head until its bearing surface contacts the die surface.

The diameter d₁ of the die hole shall be selected from series 2 of GOST 11284-75.

Cracks under the head are not permitted.

Rivets with flat countersunk and raised countersunk heads, annealed and produced by hot stamping, are not subject to this test.

3.12. The test for shank riveting capacity (headability) — according to GOST 8818-73.

Steel rivets with a shank diameter exceeding 10 mm may be tested in the hot condition (at a temperature of 850–950 °C).

3.13. The shear test of rivet shanks shall be performed at the customer’s request, according to a procedure agreed between the manufacturer and the customer.

When determining the ultimate shear strength value, the calculation shall be based on the actual diameter of the rivets.

Instead of rivets, it is permitted to test wire samples from the coil used for heading the rivets (provided that these samples were heat-treated together with the rivets submitted for testing).

3.14. Coating inspection procedure — according to GOST 9.302-88.

4. TRANSPORTATION AND STORAGE

Packaging of rivets, container marking, transportation and storage — according to GOST 18160-72.

APPENDIX 1

Mandatory

1 — product grade. Product grade B is not indicated; 2 — shank diameter; 3 — length; 4 — designation of the material grade (group); 5 — material grade.

Indicated for groups 01, 03, 21, 38 and for material not covered by this standard. The material grade may be omitted for groups 01, 03, 21, 38; 6 — designation of the coating type. The absence of a coating is not indicated; 7 — coating thickness; 8 — designation of the standard for the specific rivet type.

Example of the designation of a rivet of product grade C, with a diameter d = 8 mm, length L = 20 mm, made of material group 38, copper grade M3, with a nickel coating 6 μm thick:

Rivet C 8×20.38.M3.136 GOST…

APPENDIX 2

For reference

Materials for manufacturing rivets

In addition to the standard materials listed in Table 1, the following steel grades are used for manufacturing rivets: St2, St3 per OST 14-2-188-86 and OST 14-15-193-86; steel grades 10, 15 per TU 3-80-80.