Castle Nuts
Castle Nuts, also called slotted or castellated nuts, include slots that can be used with a cotter pin or other specified locking arrangement.
Design
Slots in the nut allow a positive locking method when used with the specified pin and compatible drilled or castellated bolt arrangement.
Materials & Grades
Carbon steel, alloy steel and stainless steel options can be evaluated according to the applicable specification.
Dimensions
Thread, nut height, width across flats and slot geometry are important procurement parameters.
Applications
Mechanical assemblies, shafts, linkages and applications requiring a positive mechanical locking arrangement.
Standards
The applicable dimensional standard depends on the exact castle/slotted nut design and project requirement.
ASTM A194/A194M — High-Pressure / High-Temperature Nuts
Where the nut is specified for high-pressure or high-temperature service, ASTM A194/A194M is a key material specification covering carbon steel, alloy steel and martensitic/austenitic stainless steel nuts. ASTM currently lists A194/A194M-26 as active. Exact grade/class, size and service requirements must be matched to the governing specification; ASTM states that grade substitutions require purchaser permission.
Manufacturing & Sourcing
BCUBE operates through manufacturing and sourcing capabilities. Requirements can be evaluated from drawing, material, grade, standard, dimensions and quantity.
Certification & Inspection
EN 10204:3.1 material certificates and Indian or international third-party inspection can be supported where required by the order and agreed inspection scope.
Current & Previous Editions
Where a standard has multiple editions, BCUBE will identify the current edition and retain relevant previous editions for project-specific procurement searches. The client's approved drawing, specification and purchase order remain the controlling documents.
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