Specification for mild steel stays and fasteners
1981 Edition

Overview of the Standard's Scope and Core Specifications

• Scope (Clause 4.1.1):
  Allows purchasers to choose options tailored to their needs, aligning international standards with Indian practical experiences.

• Rounding Off (Clause 0.5):
  Testing and analysis results must be rounded following IS 2-1960, preserving the specified significant digits.

• Sampling and Acceptance (Clause 2.1, 10.1 & Appendix A):
  Sample sizes and acceptable defect limits depend on lot size as shown in Table 2:

• Shapes and Dimensions (Clause 4.1):
  The profiles and sizes of stays and fasteners are detailed in Figures 1A, 1B, and 2 (refer to standard drawings).

flowchart TD
    A[Lot Size] --> B[Determine Sample Size]
    B --> C[Conduct Sample Inspection]
    C --> D{Defect Count}
    D -->|<= Allowed| E[Accept Lot]
    D -->|> Allowed| F[Reject Lot]

This approach ensures quality through statistical sampling per the standard.

Materials for Mild Steel Stays and Fasteners

Clause 3.1 & Table 1 Summary:

• IS 1079: Covers hot-rolled carbon steel sheets and strips (3rd revision).
• IS 1977: Defines structural steel of ordinary quality (2nd revision).

Highlights:

• Materials must adhere to these grades to assure strength and quality.
• Dimensions and shapes are standardized (see Fig. 1B for example casement handles).
• This applies specifically to window hardware stays and fasteners.

Additional Notes:

• Selected mild steel grades provide suitable tensile strength and ductility.
• Use hot-rolled carbon steel sheets and structural steel bars complying with IS standards 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 per IS 10019]
    E --> F[Final Product: Stays & Fasteners]

Consult the full IS 10019 text for comprehensive dimensions and manufacturing guidance.

Specifications for Shapes and Sizes of Steel Stays and Fasteners

Core Details (Clauses 4.1 & 4.1.1):

• Profiles and critical dimensions must comply with Figures 1A, 1B, and 2 (illustrating typical casement handle forms).
• The indicated measurements are minimum mandatory values.
• Alternative dimensions or shapes are permitted only with mutual consent.

Materials (Clause 3.1 & Table 1):

* Hot rolled carbon steel sheets and strips

• Ordinary quality structural steel

Important Specifications:

• All dimensions are specified in millimeters.
• Typical casement handles are depicted in Fig. 1A (Type 1) and Fig. 1B (Type 2).
• Stays and fasteners must meet these minimum dimensions for safety and compatibility.

Sample Dimension Table (from Fig. 1A & 1B):

(Refer to IS 10019 Figures 1A and 1B for precise dimensions)

flowchart LR
    A[Steel Stays & Fasteners] --> B[Shape as per Figures 1A, 1B, 2]
    B --> C[Minimum Dimensions are Binding]
    B --> D[Alternative Profiles Subject to Agreement]
    A --> E[Material as per Table 1]
    E --> F[Mild Steel Sheets (IS 1079)]
    E --> G[Mild Steel Bars (IS 1977)]

For exact sizing, refer directly to IS 10019 illustrations.

Guidelines for Manufacturing and Finishing Steel Stays and Fasteners

Key Points:

• 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

• Production and Finishing (Clause 6.1):

  • Items must be free from flaws, shaped accurately to specifications.
  • Edges and corners must be smoothed to remove sharpness.
  • Screw holes should be countersunk to accommodate wood screws complying with IS 6760-1972.

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

  • Measurements are in millimeters.
  • Typical shapes include L or R type handles (Type 2).
  • Test values are rounded according to IS 2-1960.

Materials Summary

Important Notes:

• Ensure screw holes are countersunk to fit wood screws properly.
• Follow IS 2-1960 for rounding test outcomes.
• Purchasers can select options based on Clauses 4.1.1 and 7.1.

flowchart TD
    A[Select Raw Materials] --> B[Manufacturing Process]
    B --> C[Check Shape & Dimensions]
    C --> D[Remove Sharp Edges]
    D --> E[Countersink Screw Holes]
    E --> F[Final Inspection & Testing]

This process guarantees compliance with IS 10019 for durable and safe stays and fasteners.

Testing Requirements Including Sampling and Acceptance Criteria

Sampling and Acceptance (Clause 4.1, 2.1, 10.1 & Appendix A)

• Lot Size, Sample Size and Allowable Defectives:

• Acceptance Criteria: A batch passes if the defective count in the tested sample does not surpass the allowed defectives.

Additional Details

• Final test results must be rounded according to IS 2:1960, preserving the specified significant figures.
• Buyers can select sampling plans per Clauses 4.1.1 and 7.1.

flowchart TD
    A[Lot Size] --> B{Select Sample Size}
    B -->|Up to 150| C[Test 5 Samples]
    B -->|151 to 300| D[Test 20 Samples]
    B -->|301 to 500| E[Test 32 Samples]
    B -->|501 to 1000| F[Test 50 Samples]
    B -->|Above 1000| G[Test 80 Samples]
    C --> H{Defectives <= 0?}
    D --> I{Defectives <= 1?}
    E --> J{Defectives <= 2?}
    F --> K{Defectives <= 3?}
    G --> L{Defectives <= 5?}
    H --> M[Batch Accepted]
    I --> M
    J --> M
    K --> M
    L --> M

This system enforces quality control through statistical inspection.

Requirements for Marking Steel Stays and Fasteners

Mandatory Marking (Clause 8.1 & 8.1.1)

• Each steel stay and fastener shall bear a clear and permanent mark indicating the manufacturer’s name or trademark.
• Optionally, the ISI certification mark may be applied to show conformity with ISI quality standards.

Sampling and Quality Checks (Clause 2.1 & Table 2)

• The sampling plan supports quality assurance through conformity checks.

Rounding Off (Clause 0.5)

• Test results must be rounded according to IS 2-1960, retaining the required significant digits.

flowchart TD
    A[Product: Steel Stay/Fastener] --> B[Mark with Manufacturer Name/Trademark]
    B --> C{Apply ISI Mark?}
    C -->|Yes| D[Add ISI Certification Mark]
    C -->|No| E[No ISI Mark]
    A --> F[Sample Based on Lot Size]
    F --> G[Compare Defectives to Allowed Limits]
    G --> H[Approve or Reject Batch]

This process ensures traceability and adherence to IS standards.

Surface Treatment Guidelines for Steel Stays and Fasteners

While IS 10019 mainly addresses sampling and conformity rather than detailed surface treatments, general protection measures include:

Sampling and Quality Control (Clause 2.1 & Table 2)

• A batch is accepted if the defective count does not exceed the permissible limit.

Typical Surface Treatments (Industry Practices)

• Common methods include galvanizing, painting, or phosphating to inhibit corrosion.
• IS 4759 defines minimum zinc coating thickness for hot-dip galvanizing (e.g., 50 microns for heavy-duty applications).
• Visual inspections and coating thickness measurements are performed per IS guidelines.

Rounding Off (Clause 0.5)

• Test outcomes should be rounded following IS 2-1960 to maintain accuracy.

flowchart LR
    A[Batch of Stays & Fasteners] --> B[Sampling as per Table 2]
    B --> C{Defectives <= Allowed?}
    C -->|Yes| D[Batch Approved]
    C -->|No| E[Batch Rejected]

For detailed coating thickness and treatment methods, consult IS 4759 (Hot Dip Galvanizing) and IS 2074 (Steel Paints). IS 10019 primarily focuses on sampling and quality conformity.

Instructions for Packing, Labeling, and Sampling of Steel Stays and Fasteners

Packaging and Labeling (Clause 9.1)

• Packaging to be done using cardboard cartons or other approved materials according to trade norms.
• Labels must indicate:
  • Manufacturer's name or trademark
  • Product type and description
  • Quantity details
  • Size specifications

Sampling and Acceptance (Clause A-2, Table 2)

• A lot consists of stays or fasteners of identical type, size, and material.
• Test results must be rounded per IS 2-1960, retaining the specified significant figures.

flowchart TD
    A[Production of Stays/Fasteners] --> B[Group into Lots]
    B --> C[Sample According to Lot Size]
    C --> D{Defectives <= Allowed?}
    D -->|Yes| E[Accept Lot]
    D -->|No| F[Reject Lot]
    E --> G[Pack in Cartons]
    G --> H[Label with Required Details]

These steps ensure product quality and traceability as per IS 10019.

Sampling Procedures and Acceptance Rules

Sampling and Acceptance Table (Table 2)

Sampling Methodology:

• Sample size depends on the lot size.
• Test the drawn samples for defects.
• The lot is accepted if defective units are within permissible limits.
• Packaging must display manufacturer details, quantity, and size (Clause 9.1).

Acceptance Criteria:

• Lots exceeding permissible defectives are rejected.
• Sampling and acceptance follow Appendix A (Clause 10.1).

flowchart LR
    A[Determine Lot Size] --> B{Choose Sample Size}
    B -->|Up to 150| C[5 Samples]
    B -->|151-300| D[20 Samples]
    B -->|301-500| E[32 Samples]
    B -->|501-1000| F[50 Samples]
    B -->|Above 1000| G[80 Samples]
    C & D & E & F & G --> H[Test Samples]
    H --> I{Defectives <= Allowed?}
    I -->|Yes| J[Accept Lot]
    I -->|No| K[Reject Lot]

This procedure maintains product quality according to IS 10019.

Appendix A Detailing Sampling and Conformity Requirements

Key Points and Table (Table 2 - Sampling Scale and Acceptance Limits)

Specifications:

• Lot Definition (A-1.1): A lot consists of stays/fasteners identical in type, shape, size, and material, manufactured under consistent conditions.
• Sampling Plan (A-2.1): Sample size is based on lot size as per Table 2.
• Acceptance Criteria (A-4.1): A lot is accepted if defective count in sample does not exceed allowed defectives.

Summary:

• Define lot.
• Select sample size accordingly.
• Inspect samples.
• Accept or reject the lot based on defectives.

flowchart TD
    A[Define Lot] --> B[Select Sample Size (Table 2)]
    B --> C[Conduct Sample Testing]
    C --> D{Defectives <= Allowed?}
    D -- Yes --> E[Accept Lot]
    D -- No --> F[Reject Lot]

This method ensures consistent quality verification of stays and fasteners.