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IS 7534 : 1985Specification for sliding locking bolts for use with padlocks

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Link points to Internet Archive / others. Not hosted by InfraLens. Details
BS EN 12051 · ANSI/BHMA A156.16
CurrentSpecializedSpecificationBIMArchitectural · Builder Hardware
PDFGoogleCompareBIS Portal
Link points to Internet Archive / others. Not hosted by InfraLens. Details
OverviewValues6InternationalTablesFAQ4Related

IS 7534:1985 is the Indian Standard (BIS) for sliding locking bolts for use with padlocks. This standard specifies the requirements for materials, dimensions, manufacture, and finish for various types of sliding locking bolts (barrel bolts) made of mild steel, brass, and aluminium. It covers different sizes and includes performance tests for strength and corrosion resistance.

Specification for sliding locking bolts for use with padlocks

Overview

Status
Current
Usage level
Specialized
Domain
Architectural — Builder Hardware
Type
Specification
Amendments
Amendment No. 1 (May 1993); Amendment No. 2 (December 2002)
International equivalents
BS EN 12051:2000 · BSI (British Standards Institution) / CEN (European Committee for Standardization), UK/EuropeANSI/BHMA A156.16-2019 · ANSI (American National Standards Institute) / BHMA (Builders Hardware Manufacturers Association), USA
Typically used with
IS 280IS 2062IS 1367IS 9844IS 210IS 410
Also on InfraLens for IS 7534
6Key values4Tables4FAQs

BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.

Practical Notes
! Ensure the type (e.g., straight, cranked) and material (steel, brass, aluminium) are correctly specified for the environmental exposure and security level.
! The standard differentiates between bolts for light/medium duty (Type 1) and heavy duty (Type 2) applications, which is a key selection criterion.
! Always check for the BIS Certification Mark (ISI mark) on the product or packaging to ensure compliance with this standard for quality assurance.
Frequently referenced clauses
Cl. 4MaterialsCl. 5Manufacture and FinishCl. 6DimensionsCl. 8Performance RequirementsCl. 9Marking and Packing
Pulled from IS 7534:1985. Browse the full clause & table index below in Tables & Referenced Sections.
Updates & Amendments2 amendments
Amendment No. 1 (May 1993)
Amendment No. 2 (December 2002)
Consolidated list per BIS. For the text of each amendment, refer to the BIS portal link above.
steelbrassaluminium

International Equivalents

Similar International Standards
BS EN 12051:2000BSI (British Standards Institution) / CEN (European Committee for Standardization), UK/Europe
MediumCurrent
Building hardware. Door and window bolts. Requirements and test methods
Covers functional and security performance of sliding bolts, but is performance-based, not prescriptive like the IS code.
ANSI/BHMA A156.16-2019ANSI (American National Standards Institute) / BHMA (Builders Hardware Manufacturers Association), USA
MediumCurrent
American National Standard for Auxiliary Hardware
Includes 'surface bolts' in its scope, providing performance grades for durability and strength rather than fixed dimensions.
Key Differences
≠IS 7534 is a prescriptive standard, defining exact materials (e.g., mild steel to IS 2062) and dimensions for specific sizes. International equivalents like EN 12051 are performance-based, allowing any material or design that meets specified test criteria for strength, durability, and corrosion.
≠International standards include mandatory cyclic durability testing. For example, ANSI/BHMA A156.16 requires Grade 1 bolts to withstand 100,000 operational cycles. IS 7534 has no requirement for durability or life cycle testing.
≠BS EN 12051 defines specific security grades based on resistance to static loads (e.g., Grade 2 requires resistance to a 1.5 kN lateral force). IS 7534 provides no such security rating; strength is implied by the specified material thickness and dimensions.
≠IS 7534 defines specific bolt sizes (e.g., 75, 100, 150 mm) with corresponding fixed dimensions for all components. EN and ANSI standards do not fix dimensions, instead requiring the product to be tested and graded according to its intended application and strength.
Key Similarities
≈All standards cover the same fundamental product type: a manually operated sliding bolt used as auxiliary security hardware on doors, gates, and windows.
≈All standards address the need for corrosion resistance. IS 7534 specifies the type of protective finish (e.g., zinc plating), while international standards specify performance in a salt spray test (e.g., 96 hours), achieving a similar goal.
≈The basic components of the bolt assembly—the sliding bolt, the case/body, and the staple/keeper—are common elements acknowledged in the design and testing requirements of all the standards.
Parameter Comparison
ParameterIS ValueInternationalSource
Basis of SpecificationPrescriptive: Defines fixed dimensions and materials for designated sizes.Performance-based: Defines grades for durability, security, and corrosion resistance.BS EN 12051:2000
Security TestingNot specified. Strength is implicit in material and dimensions.Mandatory static load test. E.g., Grade 2 requires resistance to 1.5 kN force.BS EN 12051:2000
Durability (Life Cycle)Not specified.Graded performance, e.g., Grade 1 requires 100,000 cycles.ANSI/BHMA A156.16-2019
Corrosion ResistanceSpecifies finish type, e.g., 'Zinc Plating, Service Condition No. 1'.Specifies performance, e.g., 'Grade 3: 96 hours' in Neutral Salt Spray test (EN 1670).BS EN 12051:2000
Material SpecificationRestricted to Mild Steel, Brass, or Aluminium Alloys as per specific IS codes.Not restricted; any material may be used provided it passes all performance tests.ANSI/BHMA A156.16-2019
Bolt Diameter (for a 150mm bolt)9.5 mm (for Steel/Brass) or 12.5 mm (for Aluminium).Not specified; dimension is manufacturer's choice but must pass load tests for its grade.BS EN 12051:2000
Body Plate Thickness (for a 150mm bolt)1.25 mm (for Steel) or 1.60 mm (for Brass/Aluminium).Not specified; part of the assembly that must withstand the required static load.BS EN 12051:2000
⚠ Verify details from original standards before use

Key Values6

Quick Reference Values
Minimum average zinc coating thickness5 µm (as per Clause 5.2.1)
Minimum chromium plating thickness (bright)0.3 µm (as per Clause 5.2.2)
Minimum nickel plating thickness for chromium plating10 µm (as per Clause 5.2.2)
Salt spray test duration for zinc plating24 hours (as per Appendix B)
Minimum tensile strength of steel for staples310 N/mm² (as per Clause 4.1.2)
Static load test for 150mm bolt1.0 kN for 1 minute (as per Clause 8.1)

Tables & Referenced Sections

Key Tables
Table 1 - Dimensions for Mild Steel Sliding Locking Bolts, Type 1
Table 2 - Dimensions for Mild Steel Sliding Locking Bolts, Type 2
Table 3 - Dimensions for Brass Sliding Locking Bolts
Table 4 - Dimensions for Aluminium Sliding Locking Bolts
Key Clauses
Clause 4 - Materials
Clause 5 - Manufacture and Finish
Clause 6 - Dimensions
Clause 8 - Performance Requirements
Clause 9 - Marking and Packing

Related Resources on InfraLens

Cross-Referenced Codes
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IS 2062:2011Hot Rolled Medium and High Tensile Structural...
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IS 1367:2002Technical Supply Conditions for Threaded Stee...
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IS 9844:2006Ready-Mixed Concrete — Code of Practice
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IS 210:2009Grey Iron Castings
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IS 410:2015Brass Sheets, Strips and Foils
→

Frequently Asked Questions4

What materials are specified for manufacturing sliding bolts in this code?+
Mild steel, brass, and aluminium are the primary materials specified for the bolt body and components (Clause 4).
Does this standard cover the screws needed for installation?+
Yes, it specifies that a set of matching countersunk head wood screws must be supplied with each bolt (Clause 5.4).
What are the finishing requirements for steel bolts?+
Mild steel bolts must be protected against corrosion by methods like zinc plating, black-enamelling, or nickel-chromium plating as specified in Clause 5.2.
How is the strength of the sliding bolt tested?+
A static load, varying by bolt size, is applied to the extended bolt for one minute without causing permanent damage or deformation (Clause 8.1).

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