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IS 364 : 1993Fanlight Catch -Specification

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BS EN 13126-1 · BS EN 1670 · ANSI/BHMA A156.16
CurrentSpecializedSpecificationArchitectural · Builder Hardware
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OverviewValues4InternationalTablesFAQ3Related

IS 364:1993 is the Indian Standard (BIS) for fanlight catch -specification. IS 364 specifies the requirements for materials, dimensions, manufacture, and finish of fanlight catches. Engineers and architects use this code to ensure quality standardisation of builders' hardware primarily used for securing top-hung ventilators or fanlights.

Fanlight Catch -Specification

Overview

Status
Current
Usage level
Specialized
Domain
Architectural — Builder Hardware
Type
Specification
International equivalents
BS EN 13126-1:2011 · BSI (British Standards Institution), UK / CEN (European Committee for Standardization), EuropeBS EN 1670:2007 · BSI (British Standards Institution), UK / CEN (European Committee for Standardization), EuropeANSI/BHMA A156.16-2018 · ANSI (American National Standards Institute) / BHMA (Builders Hardware Manufacturers Association), USA
Typically used with
IS 319IS 410IS 733IS 1079
Also on InfraLens for IS 364
4Key values3FAQs
Practical Notes
! Select the material based on environmental exposure; use brass or anodized aluminium in damp or coastal areas to prevent corrosion.
! Ensure the catch and striking plate are aligned perfectly during installation to ensure smooth operation and prevent mechanical wear.
! Verify the countersinking depth matches the screw heads so they sit perfectly flush with the hardware surface.
Frequently referenced clauses
Cl. 3MaterialsCl. 4DimensionsCl. 5ManufactureCl. 6FinishCl. 7Marking
Pulled from IS 364:1993. Browse the full clause & table index below in Tables & Referenced Sections.
brassaluminium alloymild steel

International Equivalents

Similar International Standards
BS EN 13126-1:2011BSI (British Standards Institution), UK / CEN (European Committee for Standardization), Europe
MediumCurrent
Building hardware - Hardware for windows and door height windows - Requirements and test methods - Part 1: Requirements common to all types of hardware
Defines general performance requirements (durability, strength, corrosion) for all window hardware, but not fanlight catches specifically.
BS EN 1670:2007BSI (British Standards Institution), UK / CEN (European Committee for Standardization), Europe
LowCurrent
Building hardware - Corrosion resistance - Requirements and test methods
Focuses solely on corrosion resistance testing, which is one specific aspect of the IS 364 standard.
ANSI/BHMA A156.16-2018ANSI (American National Standards Institute) / BHMA (Builders Hardware Manufacturers Association), USA
MediumCurrent
American National Standard for Auxiliary Hardware
Covers a broad range of auxiliary hardware, including window latches and bolts, with performance tests similar in principle.
Key Differences
≠IS 364 is highly prescriptive, specifying exact materials (e.g., mild steel to IS 2062, brass to IS 319) and dimensions. International standards like EN 13126 are performance-based, defining performance grades and allowing manufacturers to innovate with materials and design to meet those grades.
≠The corrosion resistance requirement in IS 364 is a single 96-hour neutral salt spray test. BS EN 1670 provides a graded system (Grade 1 to 5), with durations from 24 hours to 480 hours, allowing for products suited to different environments.
≠International standards often use a detailed classification system. For example, EN 13126-1 uses a multi-digit code to classify hardware on category of use, durability, corrosion resistance, etc. IS 364 has a single set of requirements with no such classification.
≠The endurance requirement in IS 364 is 5,000 cycles. The EN 13126 series specifies durability grades, where even a basic grade for a similar product would typically be 10,000 or 25,000 cycles, making it potentially more stringent.
Key Similarities
≈The fundamental purpose is identical: to specify requirements for a mechanical hardware device used to secure a fanlight or small window.
≈Both the Indian standard and the international framework (via BS EN 1670) utilize the neutral salt spray (NSS) test as a primary method for evaluating the corrosion resistance of metallic coatings.
≈The concept of a mechanical endurance test, where the product is operated through a set number of cycles to assess its durability and wear resistance, is a common feature in both IS 364 and standards like EN 13126-1.
≈All standards include general requirements for workmanship, stipulating that the finished product must be free from sharp edges, burrs, and other defects, and that moving parts must operate smoothly.
Parameter Comparison
ParameterIS ValueInternationalSource
Endurance/Durability Test5,000 cycles of operationGraded system; e.g., Grade 3 requires 10,000 cycles.BS EN 13126-1:2011
Corrosion Resistance (Plated Steel)Must withstand 96 hours of neutral salt spray test.Graded system; Grade 3 is 96 hours, Grade 4 is 240 hours.BS EN 1670:2007
Material Specification ApproachPrescriptive: Specifies exact Indian Standard material codes (e.g., mild steel sheet to IS 1079).Performance-based: Material must meet specified strength and corrosion requirements, no specific alloy is mandated.BS EN 13126-1:2011
Spring MaterialSpring steel wire (IS 4454 Part 1) or Phosphor bronze (IS 7608).Not specified; must meet the performance requirements of the product for the specified durability grade.BS EN 13126-1:2011
Finish Thickness (Zinc Plating)Average thickness not less than Service Grade No. 2 (Fe/Zn 12) of IS 1573, i.e., 12 microns.Not explicitly defined; thickness must be sufficient to pass the required corrosion grade test (e.g., 96h for Grade 3).BS EN 1670:2007
⚠ Verify details from original standards before use

Key Values4

Quick Reference Values
Material optionsBrass, aluminium alloy, or mild steel
Manufacturing requirementMust be free from defects, sharp edges, and burrs
Screw holes configurationCountersunk suitably to accommodate standard wood screws
Protective finish (Mild Steel)Stove enamelled, copper oxidized, or zinc plated to prevent corrosion

Tables & Referenced Sections

Key Tables
No tables data
Key Clauses
Clause 3 - Materials
Clause 4 - Dimensions
Clause 5 - Manufacture
Clause 6 - Finish
Clause 7 - Marking

Related Resources on InfraLens

Cross-Referenced Codes
IS 319:2019Free Cutting Brass Bars, Rods and Sections
→
IS 410:2015Brass Sheets, Strips and Foils
→
IS 733:1983Wrought Aluminium and Aluminium Alloy Plate, ...
→
IS 1079:2017Hot Rolled Carbon Steel Sheets and Strips
→

Frequently Asked Questions3

What is a fanlight catch used for?+
It is a specific builder's hardware item designed to securely hold top-hung ventilators (fanlights) in a closed position.
What materials are permitted for manufacturing fanlight catches?+
The standard allows the use of cast brass, extruded brass sheet, aluminium alloy, and mild steel, depending on the required grade and application.
How should mild steel fanlight catches be finished?+
They must be properly treated to resist corrosion, typically through stove enamelling, zinc plating, or copper oxidation.

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