Available Sizes & Finishes
22 sizes available
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Applications & Selection Guide
ISO 898-2 class 5 slotted (castle / castellated) hex nuts to DIN 935 / ISO 7035. Radial slots in the crown take a split pin (cotter) through a drilled bolt, locking the nut in a discrete position. Listed M4–M52. Pair with class 4.8 bolts that have a pin hole.
The classic retention method on axles, clevis pins, turnbuckles, and linkages where the joint must not unscrew and a visual pin check is required. Castle nuts are not tightened to an arbitrary high preload and then pinned — the pin position and the specified nut rotation / castle alignment govern. Use class 5 with 4.8; step up class with the bolt.
Add sizes and quantities to the quote cart. Mention if split pins should be quoted with the nuts, plus coating and destination.
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 5
Manufacturing Standard
DIN 935 / ISO 7035
Material Type
Steel
Category
Castle Nut
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