Steel Castle Nut, Class 8
ISO 898-2 class 8 slotted castle nuts to DIN 935 / ISO 7035. Cotter-locked nuts for class 8.8 joints that must not back off — kingpins, linkages, and adjustable rods. Listed M4–M52.
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Available Sizes & Finishes
22 sizes available
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Applications & Selection Guide
ISO 898-2 property class 8 slotted castle (castellated) nuts to DIN 935 / ISO 7035. Radial slots take a split pin through a drilled class 8.8 bolt, locking the nut in a discrete, inspectable position. Listed M4–M52. The bolt must be drilled for the pin.
Specify when the drawing calls for a castellated nut and split pin on an 8.8 fastener. Nylon lock nuts are easier to assemble but hide the lock; castle nuts remain inspectable. The bolt must be drilled for the pin. Do not substitute a class 5 castle nut under an 8.8 bolt.
Request a quote with sizes, quantities, finish, and destination. Split pins can be included in the same enquiry.
Technical guides
Bolt grades and sizes: 8.8, 10.9, 12.9, A2 and A4, and metric hex bolt dimensions
What the property classes 4.8, 8.8, 10.9 and 12.9 and stainless A2-70 and A4-70 mean, minimum strength and tensile loads, metric thread pitch and hex head sizes, DIN 933 vs DIN 931, and which nut goes with which bolt.
Read the guide →Nut and washer types compared: hex, lock, flange, castle, coupling, cap and HV nuts, flat, spring and structural washers, with their standards
How hex, thin, nylon-insert and all-metal lock, flange, castle, coupling, cap, wing and HV nuts differ, which nut class goes with which bolt, and when to use DIN 125, DIN 127, DIN 7989 and DIN 6916 washers.
Read the guide →Product Information
Material Grade
ISO 898-2 class 8
Manufacturing Standard
DIN 935 / ISO 7035
Material Type
Steel
Category
Castle Nut
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