Specification for mild steel stays and fasteners

IS 10019: Scope & Key Specifications

• Scope (Clause 4.1.1):
  The standard allows purchaser options for selection to suit requirements, harmonizing international practices with Indian field experience.

• Rounding Off (Clause 0.5):
  Final test/analysis values must be rounded per IS 2-1960, retaining the same significant figures as specified.

• Sampling & Conformity (Clause 2.1 & 10.1, Appendix A):
  Sample size and permissible defectives depend on lot size as per Table 2:

• Shape & Dimensions (Clause 4.1):
  Steel stays and fasteners shapes/dimensions are specified in Figures 1A, 1B, and 2 (refer to IS 10019 drawings).

flowchart TD
    A[Lot Size] --> B[Determine Sample Size]
    B --> C[Inspect Sample]
    C --> D{Number of Defectives}
    D -->|≤ Permissible| E[Lot Accepted]
    D -->|> Permissible| F[Lot Rejected]

This ensures quality control by statistical sampling per IS 10019.

IS 10019: Materials for Mild Steel Stays and Fasteners

Clause 3.1 & Table 1 Summary:

• *IS 1079: Specification for hot rolled carbon steel sheet and strip (3rd revision).
• +IS 1977: Specification for structural steel (ordinary quality) (2nd revision).

Key Points:

• Materials must comply with the above grades for strength and quality.
• Dimensions and shapes are standardized (see Fig. 1B for typical casement handle).
• Applies specifically to stays and fasteners used in window hardware.

Additional Notes:

• Mild steel grades ensure adequate tensile strength and ductility.
• Use hot rolled carbon steel sheets and structural steel bars as per IS for durability.
• Follow IS 10019 for manufacturing and finishing details.

flowchart TD
    A[Material Selection] --> B{Type}
    B -->|Sheet| C[Grade 0-1079 (IS 1079)]
    B -->|Bar| D[Grade Fe 310-0 (IS 1977)]
    C & D --> E[Manufacture & Finish as per IS 10019]
    E --> F[Final Stays & Fasteners]

For detailed dimensions and manufacturing, refer to IS 10019 full text.

IS 10019: Shape and Dimensions of Steel Stays and Fasteners

Key Points from Clauses 4.1 & 4.1.1:

• Shapes and essential dimensions must follow Fig. 1A, 1B, and 2 (typical casement handle types).
• Dimensions shown are minimum and binding.
• Alternative shapes/dimensions allowed only if mutually agreed.

Materials (Clause 3.1 & Table 1):

* Hot rolled carbon steel sheet and strip

• Structural steel (ordinary quality)

Important Specifications:

• All dimensions are in millimeters.
• Typical casement handles are shown in Fig. 1A (Type 1) and Fig. 1B (Type 2).
• Fasteners and stays must meet these minimum sizes for safety and compatibility.

Summary Table for Dimensions (Example from Fig. 1A & 1B):

(Refer to IS 10019 Fig. 1A, 1B for exact values)

flowchart LR
    A[Steel Stays & Fasteners] --> B[Shape as per Fig. 1A, 1B, 2]
    B --> C[Minimum Dimensions Binding]
    B --> D[Alternative Shapes with Agreement]
    A --> E[Materials as per Table 1]
    E --> F[Mild Steel Sheets - IS 1079]
    E --> G[Mild Steel Bars - IS 1977]

For exact dimensions, consult IS 10019 figures directly.

IS 10019: Manufacture and Finish of Steel Stays and Fasteners

Key Specifications:

• Materials (Clause 3.1 & Table 1):

  • Mild steel sheets: Grade 0-1079 as per IS 1079-1973
  • Mild steel bars: Grade Fe 310-0 as per IS 1977-1975

• Manufacture & Finish (Clause 6.1):

  • Products must be free from defects, correctly shaped and dimensioned.
  • Sharp edges and corners must be removed and finished smooth.
  • Screw holes are countersunk to fit wood screws conforming to IS 6760-1972.

• Dimensions & Shape (Clause 1.1 & Fig 1B):

  • Dimensions are in millimeters.
  • Typical shapes include handles (L or R) Type 2.
  • Final values for tests must be rounded per IS 2-1960 rules.

Summary Table: Materials

Important Notes:

• Ensure countersunk holes for wood screws.
• Follow IS 2-1960 for rounding off test results.
• Purchaser may select options per Clauses 4.1.1 and 7.1.

flowchart TD
    A[Raw Material Selection] --> B[Manufacture]
    B --> C[Shape & Dimension Check]
    C --> D[Finish: Remove Sharp Edges]
    D --> E[Countersink Screw Holes]
    E --> F[Final Inspection & Testing]

This ensures compliance with IS 10019 for durable, safe steel stays and fasteners.

IS 10019: Testing Requirements - Key Formulas, Tables & Specifications

Sampling & Conformity (Clause 4.1, 2.1, 10.1 & Appendix A)

• Lot Size vs Sample Size & Permissible Defectives:

  Lot Size	Sample Size	Permissible No. of Defectives
  Up to 150	5	0
  151 to 300	20	1
  301 to 500	32	2
  501 to 1000	50	3
  1001 and above	80	5

• Conformity Criterion:
  A lot conforms if the number of defective stays/fasteners in the sample does not exceed the permissible number in column 3.

Additional Specifications

• Final test values must be rounded as per IS 2:1960 to the same significant digits as specified.
• Purchaser has the option to select sampling criteria suited to their requirements (Clauses 4.1.1 and 7.1).

flowchart TD
    A[Lot Size] --> B{Select Sample Size}
    B -->|Up to 150| C[Sample 5]
    B -->|151 to 300| D[Sample 20]
    B -->|301 to 500| E[Sample 32]
    B -->|501 to 1000| F[Sample 50]
    B -->|1001 & above| G[Sample 80]
    C --> H{Defectives ≤ 0?}
    D --> I{Defectives ≤ 1?}
    E --> J{Defectives ≤ 2?}
    F --> K{Defectives ≤ 3?}
    G --> L{Defectives ≤ 5?}
    H --> M[Lot Conforms]
    I --> M
    J --> M
    K --> M
    L --> M

This ensures quality control by statistically verifying the lot based on sample testing.

IS 10019: Marking of Steel Stays and Fasteners

Key Specifications for Marking (Clause 8.1 & 8.1.1)

• Mandatory Marking: Each steel stay and fastener must be clearly and permanently marked with the manufacturer's name or trademark.
• Optional Marking: May also bear the ISI Certification Mark, indicating compliance with ISI quality control and inspection.

Sampling and Quality Control (Clause 2.1 & Table 2)

• Sampling size and permissible defectives ensure quality conformity.

Rounding Off (Clause 0.5)

• Test results should be rounded off per IS 2-1960, maintaining the same number of significant digits as specified values.

Summary Diagram

flowchart TD
    A[Steel Stay/Fastener] --> B[Mark with Manufacturer Name/Trademark]
    B --> C{Optional}
    C -->|Yes| D[Mark ISI Certification Mark]
    C -->|No| E[No ISI Mark]
    A --> F[Sampling per Lot Size]
    F --> G[Check Defectives Against Permissible Limits]
    G --> H[Accept or Reject Lot]

This ensures traceability, quality assurance, and compliance with IS standards.

IS 10019: Surface Treatment - Key Points

IS 10019 primarily covers mild steel stays and fasteners, with sampling and conformity criteria rather than detailed surface treatment formulas. However, for surface treatment in steel components, the following general guidelines apply:

Sampling & Quality Control (Clause 2.1 & Table 2)

• Lot conformity: A lot is accepted if defectives ≤ permissible number.

Surface Treatment Specifications (General Engineering Practice)

• Common treatments: Galvanizing, painting, or phosphating to prevent corrosion.
• Thickness: For galvanizing, IS 4759 specifies minimum zinc coating thickness (e.g., 50 microns for heavy duty).
• Inspection: Visual and thickness tests per IS standards.

Rounding Off (Clause 0.5)

• Follow IS 2-1960 for rounding test results to match specified precision.

flowchart LR
    A[Lot of Stays & Fasteners] --> B[Sampling as per Table 2]
    B --> C{Number of Defectives}
    C -->|≤ Permissible| D[Accept Lot]
    C -->|> Permissible| E[Reject Lot]

For detailed surface treatment specs (coating thickness, method), refer to IS 4759 (Hot Dip Galvanizing) or IS 2074 (Paints for Steel). IS 10019 focuses on sampling and conformity criteria.

IS 10019: Packing, Labeling, and Sampling of Steel Stays & Fasteners

Packing & Labeling (Clause 9.1)

• Packing: Use cardboard boxes or approved packing as per trade practice.
• Labeling: Boxes must show:
  • Manufacturer's name/trade mark
  • Type and description of contents
  • Quantity particulars
  • Size details

Sampling & Conformity (Clause A-2, Table 2)

• Lot: Group of steel stays/fasteners of same type, size, and material.
• Test result rounding: As per IS 2-1960, maintain significant figures as per specified values.

flowchart TD
    A[Manufacture of Stays/Fasteners] --> B[Grouping into Lots]
    B --> C[Sampling as per Lot Size]
    C --> D{Number of Defectives ≤ Permissible?}
    D -->|Yes| E[Lot Accepted]
    D -->|No| F[Lot Rejected]
    E --> G[Packing in Boxes]
    G --> H[Labeling with Details]

This ensures quality and traceability in supply per IS 10019.

IS 10019: Sampling and Criterion for Conformity

Key Table: Scale of Sampling and Criterion for Conformity (Table 2)

Summary of Sampling Procedure:

• Select sample size based on lot size (see table above).
• Test the selected stays and fasteners.
• The lot conforms if the number of defective items ≤ permissible defectives in column 3.
• Packaging must include manufacturer's details, quantity, and size (Clause 9.1).

Criterion for Conformity:

• If defective count > permissible number, the lot is rejected.
• Sampling and conformity criteria are per Appendix A (Clause 10.1).

flowchart LR
    A[Lot Size] --> B{Select Sample Size}
    B -->|Up to 150| C[Sample Size = 5]
    B -->|151-300| D[Sample Size = 20]
    B -->|301-500| E[Sample Size = 32]
    B -->|501-1000| F[Sample Size = 50]
    B -->|1001+| G[Sample Size = 80]
    C & D & E & F & G --> H[Test Samples]
    H --> I{Defectives ≤ Permissible?}
    I -->|Yes| J[Lot Accepted]
    I -->|No| K[Lot Rejected]

This ensures quality control per IS 10019 standards.

IS 10019 - Appendix A: Sampling Method & Conformity Criteria

Key Points & Table (Table 2 - Scale of Sampling and Criterion for Conformity)

Specifications:

• Lot Definition (A-1.1): All stays/fasteners of the same type, shape, size, and material under identical manufacturing conditions form a lot.
• Sampling (A-2.1): Sample size depends on lot size as per Table 2.
• Conformity Criterion (A-4.1): A lot is conforming if the number of defectives in the sample ≤ permissible defectives in Table 2.

Summary:

• Select sample size based on lot size.
• Count defectives in sample.
• Accept lot if defectives ≤ permissible number.

flowchart TD
    A[Define Lot] --> B[Select Sample Size (Table 2)]
    B --> C[Test Sample]
    C --> D{Defectives ≤ Permissible?}
    D -- Yes --> E[Lot Accepted]
    D -- No --> F[Lot Rejected]

This ensures quality control by statistically verifying conformity of stays and fasteners.