GOST 11532-93 Nuts for Rail Joint Bolts of Railway Track. Specifications

GOST 11532-93 establishes specifications for nuts for railway rail joint bolts.

Foreword

1 DEVELOPED BY Gosstandart of Russia

SUBMITTED BY the Technical Secretariat of the Interstate Council for Standardization, Metrology and Certification

2 ADOPTED BY the Interstate Council for Standardization, Metrology and Certification on October 21, 1993

The following voted in favor of adoption:

Name of state	Name of national standardization body
Republic of Belarus	Belstandart
Republic of Kyrgyzstan	Kyrgyzstandart
Republic of Moldova	Moldovastandart
Russian Federation	Gosstandart of Russia
Republic of Tajikistan	Tajikstandart
Turkmenistan	Turkmenglavgosinspektsiya
Ukraine	Gosstandart of Ukraine

3 By Decree No. 160 of the Committee of the Russian Federation for Standardization, Metrology and Certification dated 02.06.94, interstate standard GOST 11532-93 was put into effect directly as a state standard of the Russian Federation as of 01.01.95

4 SUPERSEDES GOST 11532-76

NUTS FOR RAIL JOINT BOLTS OF RAILWAY TRACK Specifications Nats for rail joints Specifications	GOST 11532-93

Effective date 01.01.95

This standard applies to nuts of product grades B and C for bolts with diameters M22, M24 and M27, used for fastening railway rail joints.

The requirements of this standard are mandatory.

When nuts are supplied for export as separate products, the requirements of this standard and GOST 16018 shall be taken into account.

1. Design and dimensions

1.1. The design and dimensions of nuts shall conform to those shown in the drawing and table.

Design 1 (product grade C)

Design 2 (product grade B)

Table 1

mm

d			M 22	M21	M27
Thread pitch P			2.5	3.0
S (limit deviation −1.0)			36		41
e, min, for design		1	38.8		44.4
		2	39.6		45.2
da		min	22	24	27
		max	23.8	25.9	29.2
du			33.2	33.2	38.0
m	Nom.		25	27	30
	Limit deviation for design	1	± 1.3	± 1.5	± 2.0
		2	± 1.25
Symmetry tolerance of the hexagon (width across flats) relative to the hole axis, in diametral terms, max			2.0

Designation examples

Nut of design 1, product grade C, with thread diameter d = 24 mm, coarse thread pitch, tolerance class 7H, property class 5:

Nut CM24-7H.5 GOST 11532-93

Same, for design 2, product grade B:

Nut B2M24-7H.5 GOST 11532-93

2. Technical requirements

2.1. Nuts shall be manufactured in accordance with the requirements of this standard and GOST 1759.0.

2.2. The mechanical properties of nuts shall conform to property class 5 or 8 per GOST 1759.5.

2.3. Thread - per GOST 24705.

2.4. Tolerance class 7H - per GOST 16093; tolerance class 7G is permitted.

2.5. In design 1 nuts, metal flow resulting in a local reduction of edge height of not more than 3 mm is permitted.

2.6. Design 2 nuts may be manufactured without a 30° chamfer on one of the end faces, as well as with a rim on one end face with a thickness of not more than 3 mm.

2.7. Tolerances for form and position deviations of surfaces - per GOST 1759.1.

2.8. Permissible surface defects - per GOST 1759.3.

2.9. The mass of nuts is given in the appendix.

2.10. The letter “P” shall be marked on one of the bearing surfaces of property class 8 nuts.

2.11. Packaging of nuts and marking of containers - per GOST 18160.

3. Acceptance

3.1. Acceptance rules - per GOST 17769 for products of product grades B and C.

3.2. Testing of mechanical properties of nuts shall be carried out at the consumer’s request per GOST 1759.5.

4. Test methods

4.1. Visual inspection of nuts shall be carried out without the use of magnifying instruments.

4.2. Dimensional inspection methods - per GOST 1759.1.

4.3. Surface defect inspection - per GOST 1759.3.

5. Transportation

Nuts shall be transported together with bolts - per GOST 11530 by any mode of transport, except railway flatcars.

Appendix (reference)

Theoretical mass of 1000 nuts for bolts, kg

Nut size	Mass of nuts by design
	1	2
M22	154	152
M24	155	153
M27	222	220

Notes:

1. The mass of nuts is calculated based on nominal dimensions and a steel density of 7850 kg/m³.

2. If both design 1 and design 2 nuts can be used, the mass of design 2 nuts shall be specified in the design documentation.

Informational data

Referenced regulatory and technical documents

Designation of the referenced regulatory document	Clause number
GOST 1759.0-87	2.1
GOST 1759.1-82	2.7 ; 4.2
GOST 1759.3-83	2.8 ; 4.3
GOST 1759.5-67	2.2 ; 3.2
GOST 11530-93	5
GOST 16018-79	Introductory part
GOST 16093-1	2.4
GOST 17769-83	3.1 .
GOST 18160-72	2.11
GOST 24705-81	2.3