Hasps and Staples -Specification

IS 363: Scope - Key Specifications and Tables

IS 363 covers dimensions, materials, and tolerances for hasps and staples used in locks.

1. Material Requirements (Table 1)

2. Dimensional Tables

• Table 2: Mild Steel Hasps & Staples (Type 1)
• Table 3: Brass/Aluminium Alloy Hasps & Staples (Type 1)
• Table 4: Mild Steel Hasps & Staples (Type 2)

Each table specifies key dimensions (A, B, C, etc.), thickness (T), hinge pin diameter (d), screw holes, and wood screw sizes.

3. Sampling (Clause 10.2.1)

Sample size for testing depends on lot size per Table 5 and IS 4905:1968.

4. Rounding Off (IS 2:1960)

Final test values are rounded to the same decimal places as specified.

Example: Mild Steel Hasps (Type 1) for Size 90 mm (from Table 2)

IS 363 Key References: Hasps and Staples Dimensions & Material Specifications

1. Material Specifications (Table 1)

2. Dimensions of Hasps and Staples

• Mild Steel Hasps & Staples - Type 1 (Table 2)
  Sizes: 90, 115, 150, 175 mm with sheet thickness (T) from 2.00 to 2.24 mm, hinge pin diameter (d) 4.00 to 5.00 mm, and wood screw sizes 8 to 10.

• Brass/Aluminium Alloy Hasps & Staples - Type 1 (Table 3)
  Similar sizes with thickness T ~2.00-3.00 mm, hinge pin diameter ~3.15-4.00 mm, wood screw sizes 5 to 8.

• Mild Steel Hasps & Staples - Type 2 (Table 4)
  Sizes from 65 to 175 mm, sheet thickness T from 1.25 to 2.00 mm, wood screw sizes 6 to 10.

3. Sampling (Clause 10.2.1 & Table 5)

• Sample size depends on lot size.
• Random selection referencing IS 4905:1968.

Summary Table Example (Mild Steel Type 1 Hasps)

| Size (mm) | Sheet Thickness T (mm) | Hinge Pin Dia d (mm) | Wood Screw No. | |

IS 363 - Key Material Specifications and Dimensions for Hasps and Staples

1. Material Grades (Table 1)

2. Dimensions & Tolerances

• Mild Steel Hasps & Staples (Type 1): Thickness (T) ranges from 2.00 to 2.24 mm; hinge pin diameter (d) 4.00 to 5.00 mm; wood screw sizes 8-10.
• Brass/Aluminium Alloy Hasps & Staples (Type 1): Thickness (T) 2.00 to 3.00 mm; hinge pin diameter 3.15 to 4.00 mm; wood screw sizes 5-8.
• Mild Steel Hasps & Staples (Type 2): Thickness (T) 1.25 to 2.00 mm; wood screw size 6-10.

Refer to Tables 2-4 for detailed dimensions (A, B, C... etc.) with tolerances ±0.05 to ±2 mm depending on the dimension.

3. Sampling (Clause 10.2.1)

• Sample size depends on lot size (see Table 5 in IS 363).
• Random sampling per IS 4905:1968.

Summary Table Example (Mild Steel Type 1)

| Size (mm) | Thickness T (mm) | Hinge Pin d (mm) | Wood Screw No. | |-----------|------------------|------------------|

IS 363: Dimensions and Tolerances for Hasps and Staples

Key Points:

• Dimensions and tolerances are specified in Tables 2 to 4 and illustrated in Figs. 1 & 2.
• Sampling for lot size follows Clause 10.2.1 and Table 5 referencing IS 4905:1968.
• Material grades are per Table 1 (e.g., Mild Steel Grade 0 - IS 1079:1988, Brass Grade LCB-2 - IS 292:1983).

Important Dimensions & Tolerances (Extract from Table 2 - Mild Steel Hasps & Staples Type 1):

Material Specifications (Table 1):

IS 363: Manufacture of Hasps and Staples - Key Specifications

1. Material Specifications (Table 1)

2. Dimensional Standards

• Mild Steel Hasps & Staples (Type 1): See Table 2 for sizes 90 to 175 mm with thicknesses from 2.00 to 2.24 mm and hinge pin diameters 4.00 to 5.00 mm.
• Brass/Aluminium Alloy Hasps & Staples (Type 1): See Table 3 for sizes 90 to 175 mm with thicknesses 2.00 to 3.00 mm.
• Mild Steel Hasps & Staples (Type 2): See Table 4 for sizes 65 to 175 mm, thickness 1.25 to 2.00 mm.

3. Sampling for Quality (Clause 10.2.1)

• Sample size depends on lot size (refer IS 4905:1968).
• Selection must be random.

Summary Table Example (Mild Steel Type 1, Size 90 mm):

IS 363: Finish Specifications for Hasps and Staples

Material & Finish Requirements:

Key Notes on Finish:

• Hinge Pins:
  • Mild steel pins for mild steel hasps/staples.
  • Mild steel or brass pins for brass/aluminium hasps/staples.
  • Phosphor bronze pins may be used for brass hasps if requested.
• Corrosion Resistance:
  • Brass or phosphor bronze hinge pins recommended in corrosive atmospheres.
• Surface Preparation:
  • All sharp edges and corners must be removed.
  • Screw holes clean and countersunk for specified wood screws.

Relevant Tables for Dimensions & Screws (Examples from Table 2 for Mild Steel Type 1):

Summary Diagram of Finish Process:

flowchart LR
    A[Hasp & Staple Material] --> B{Material Type}
    B -->|Mild Steel| C[Stove Enamelled Black Finish]
    B -->|Brass| D[Polish -> Oxidize/Lacquer]
    B -->|Aluminium Alloy| E[Anodize (Grade AC 10)]
    C & D & E --> F[Final Inspection: Smooth Edges, Countersunk Holes]

IS 363: Marking and Specifications for Hasps and Staples

Key Specifications:

• Materials: As per Table 1, suitable Indian Standard grades include:
  • Extruded aluminium alloy: IS 733:1983 (63400 WP)
  • Aluminium alloy sheet: IS 737:1986 (52000-H1)
  • Cast brass: IS 292:1983 (Grade LCB-2)
  • Mild steel: IS 1079:1988 (Grade 0)
  • Mild steel wire: IS 280:1978 (Grade 1H)
  • Phosphor bronze wire: IS 7608:1987 (Grade 1)
  • Aluminium alloy bars/rods/wire: IS 733:1983 & IS 739:1992

Dimensions:

• Tables 2 to 4 specify dimensional tolerances for mild steel, brass, and aluminium alloy hasps and staples (Types 1 & 2).
• Dimensions include length (A), width (B), thickness (T), hinge pin diameter (d), screw holes count, and corresponding wood screw sizes.

Marking & Packaging (Clause 8.1.1):

• Hasps and staples may bear the Standard Mark.
• Packaging must be labelled with:
  • Manufacturer's name/trade-mark
  • Quantity
  • Description, size, and type of hasps and staples

Sampling:

• Sampling size depends on lot size per Table 5 (Clause 10.2.1).
• Random selection referencing IS 4905:1968.

Example: Dimensions for Mild Steel Hasps - Type 1 (from Table 2)

IS 363: Key Specifications for Packing of Hasps and Staples

Packing Requirements (Clause 8.1.1)

• Hasps and staples shall be packed in cartons or approved packing.
• Each package must be labelled with:
  • Manufacturer's name or trade-mark
  • Quantity
  • Description of contents
  • Size and type of hasps and staples
• Items may carry the Standard Mark.

Sampling for Quality Control (Clause 10.2 & 10.2.1)

• Sample size depends on lot size (Table 5, IS 363).
• Samples are selected randomly.
• Reference for sampling method: IS 4905 : 1968.

Dimensions & Tolerances (Tables 2 to 4)

• Table 2: Mild Steel Hasps & Staples (Type 1)
• Table 3: Brass/Aluminium Alloy Hasps & Staples (Type 1)
• Table 4: Mild Steel Hasps & Staples (Type 2)

Key parameters include:

• Lengths (A, B, C, etc.)
• Thickness of sheet (T)
• Diameter of hinge pin (d)
• Number of screw holes
• Wood screw size

Example: Mild Steel Hasps (Type 1, Size 90 mm)

For detailed dimensions, refer to Tables 2-4 in IS 363 and ensure packing labels meet Clause 8.1.1 requirements.

IS 363 Sampling and Inspection Key Points

1. Lot Size & Sample Size (Clause 10.2 & 10.2.1)

• Sample size depends on lot size as per Table 5 (not provided here).
• Sampling must be random, referring to IS 4905:1968 for procedure.

2. Criterion for Conformity (Clause 10.4)

• A lot is conforming if the number of defectives ≤ acceptance number from Table 5, col 3.
• If defectives exceed acceptance number, lot is non-conforming.

3. Dimensions & Tolerances (Tables 2 to 4)

• Tables 2, 3, 4 specify dimensions for Mild Steel and Brass/Aluminium Hasps and Staples.
• Key dimensions include:
  • Size (A): e.g., 90, 115, 150, 175 mm
  • Thickness (T), Hinge Pin diameter (d)
  • Number of screw holes on hasp and staple
• Tolerances are ± values (e.g., 90±2 mm for size A).

Summary Table Example (Mild Steel Hasps - Type 1)

Sampling Acceptance Example (conceptual)

flowchart TD
    A[Start: Select Lot] --> B[Determine Lot Size

IS 363 - Criterion for Conformity (Clause 10.4)

A lot is accepted if the number of defective hasps and staples in the sample does not exceed the acceptance number from Table 5 below; otherwise, it is rejected.

Table 5: Sampling Plan & Acceptance Criteria

Summary:

• Sample Size depends on lot size.
• Acceptance Number is the maximum allowable defective items in the sample.
• If defects ≤ acceptance number → Lot conforms.
• If defects > acceptance number → Lot does NOT conform.

This follows standard acceptance sampling principles ensuring quality control by random sampling.

flowchart TD
    A[Start: Receive Lot] --> B{Determine Lot Size}
    B -->|Up to 100| C[Sample 13 items]
    B -->|101 to 300| D[Sample 20 items]
    B -->|301 to 500| E[Sample 32 items]
    B -->|501 to 1000| F[Sample 50 items]
    B -->|1001 and above| G[Sample 80 items]

    C --> H{Count Defectives}
    D --> H
    E --> H
    F --> H
    G --> H

    H -->|Defects ≤ Acceptance Number| I[Accept Lot]
    H -->|Defects > Acceptance Number| J[Reject Lot]

This ensures compliance with IS 363 quality requirements for hasps and staples.

IS 363 - List of Referenced Indian Standards & Key Specifications

1. Referenced Indian Standards (Annex A)

2. Sampling & Acceptance Criteria (Table 5, Clause 10.2 & 10.4)

Notes:

• Materials and grades conform to the latest versions of these IS standards.
• Sampling criteria ensure quality control during inspection.
• Use the Standard Mark as per BIS guidelines for compliance assurance.

flowchart TD
    A[Material Specification] --> B{Refer IS Standards}
    B -->|Steel Wire| IS280
    B -->|Brass| IS292
    B -->|Aluminium Bars| IS733
    B -->|Sampling| IS4905
    B -->|Quality Check

IS 363: Committee Composition - Key Specifications & Tables

The standard does not explicitly specify the committee composition in the main clauses; it is provided in Annex B (not included here).

Key Relevant Specifications from IS 363:

• Lot Size & Sample Size (Clause 10.2, 10.2.1):
  Sampling of hasps and staples depends on lot size per Table 5 (not fully shown). Samples are selected randomly per IS 4905:1968.

• Materials (Table 1):
  Suitable materials and Indian Standards include:

  • Extruded Aluminium Alloy: IS 733:1983 (63400 WP)
  • Aluminium Alloy Sheet: IS 737:1986 (52000-H1)
  • Cast Brass: IS 292:1983 (Grade LCB-2)
  • Mild Steel: IS 1079:1988 (Grade 0)
  • Mild Steel Wire: IS 280:1978 (Grade Į H)
  • Phosphor Bronze Wire: IS 7608:1987 (Grade 1)

• Dimensions:
  Detailed dimensions for hasps and staples (Type 1 & 2) are provided in Tables 2, 3, and 4 with key parameters such as:

  • Size (mm)
  • Thickness of sheet (T)
  • Diameter of hinge pin (d)
  • Number of screw holes and wood screw sizes

Example: Mild Steel Hasps & Staples (Type 1) Dimensions (Table 2 excerpt)