IS 1367 Part 3 : 2002Technical Supply Conditions for Threaded Steel Fasteners - Part 3: Mechanical Properties of Fasteners Made of Carbon Steel and Alloy Steel - Bolts, Screws and Studs
Link points to Internet Archive / others. Not hosted by InfraLens. Details
IS 1367:2002 Part 3 is the Indian Standard (BIS) for technical supply conditions for threaded steel fasteners - part 3: mechanical properties of fasteners made of carbon steel and alloy steel - bolts, screws and studs. This part of IS 1367 specifies the mechanical and physical properties of bolts, screws, and studs made of carbon and alloy steel when tested at ambient temperatures. It establishes the globally standardized property class designation system (e.g., 4.6, 8.8, 10.9) and details testing methods for assessing ultimate tensile strength, yield strength, proof load, and hardness.
Specifies the mechanical properties of bolts, screws, and studs made of carbon steel and alloy steel.
! Always match the nut property class to or higher than the bolt property class (e.g., use a Class 8 nut for a Class 8.8 bolt) to prevent thread stripping.
! In case of a dispute, the proof load test is the decisive acceptance criterion over hardness testing.
! This standard applies to standard nuts but excludes those requiring special properties like weldability, extreme temperature resistance, or corrosion resistance.
Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs with specified property classes - Coarse thread and fine pitch thread
Defines identical property classes and mechanical requirements for carbon/alloy steel bolts, screws, and studs.
ASTM F568M-20ASTM International (US)
HighCurrent
Standard Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners
Covers chemical and mechanical requirements for metric bolts, screws, and studs in property classes very similar to IS/ISO.
EN ISO 898-1:2013CEN (European)
HighCurrent
Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs with specified property classes (ISO 898-1:2013)
The European adoption of ISO 898-1, making it technically identical to the international standard.
ISO 898-1:1999ISO (International)
HighWithdrawn
Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws and studs
This is the direct predecessor to the current ISO standard and the likely basis for IS 1367:2002.
Key Differences
≠IS 1367:2002 is based on the withdrawn ISO 898-1:1999, while current international standards like ISO 898-1:2013 include updated requirements.
≠The current ISO 898-1:2013 has more stringent material requirements for large diameter (≥ M16) Class 8.8 bolts to ensure sufficient core hardness and prevent failure, which are not as explicit in IS 1367:2002.
≠ISO 898-1:2013 specifies mandatory Charpy impact testing for certain high-strength classes (10.9, 12.9) above certain sizes, whereas IS 1367:2002 often lists it as a supplementary requirement to be agreed upon.
≠Modern international standards provide more detailed information on the applicability of fasteners at elevated and low temperatures, which is less defined in the 2002 Indian standard.
Key Similarities
≈The fundamental system of Property Classes (e.g., 4.6, 8.8, 10.9, 12.9) for defining fastener strength is identical across all standards.
≈Nominal values for key mechanical properties like ultimate tensile strength, yield strength, and proof load stress are harmonized for most common property classes.
≈The basic types of tests required for conformity are the same, including tensile tests, proof load tests, hardness tests, and head soundness tests.
≈The designation system for bolts, screws, and studs, which includes the thread size, length, and property class (e.g., 'M12 x 50 - 8.8'), is consistent.
Parameter Comparison
Parameter
IS Value
International
Source
Ultimate Tensile Strength (UTS), Class 8.8 (d > 16mm)
830 MPa (min)
830 MPa (min)
ISO 898-1:2013
Yield Strength (ReL or Rp0.2), Class 8.8
640 MPa (min)
640 MPa (min)
ISO 898-1:2013
Proof Load Stress (Sp), Class 10.9
830 MPa
830 MPa
ISO 898-1:2013
Hardness (Vickers), Class 10.9
320-380 HV
320-380 HV
ISO 898-1:2013
Percentage Elongation after Fracture (A), Class 8.8
12% (min)
12% (min)
ISO 898-1:2013
Charpy Impact Strength (KV) for Class 10.9 (d > 16mm)
30 J at -40°C (if specified)
27 J at -20°C (mandatory unless from low carbon martensitic steel)
ISO 898-1:2013
Hardness (Vickers), Class 12.9
385-435 HV
385-435 HV
ISO 898-1:2013
⚠ Verify details from original standards before use
Key Values4
Quick Reference Values
applicable thread diameterUp to M39
regular nut property classes4, 5, 6, 8, 9, 10, 12
thin nut property classes04, 05
temperature rangeTested at 10 to 35 °C
Key Formulas
F = As × Sp (Proof Load = Nominal stress area × Proof stress)
Tables & Referenced Sections
Key Tables
Table 1 - Mechanical properties of nuts
Table 3 - Proof load values for nuts with coarse thread
Table 4 - Proof load values for nuts with fine pitch thread