Available Sizes & Finishes
12 sizes available
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Applications & Selection Guide
ISO 898-2 class 5 hexagon cap (acorn / dome) nuts to DIN 1587. A closed domed crown covers the protruding bolt end for a clean finish and to prevent snagging. Metric coarse, listed M4–M24. Pair with class 4.8 bolts.
Typical on railings, furniture, display frames, machine guards, and any joint where an open hex nut would leave a sharp thread. The dome limits how much thread the nut can accept — check protrusion length before specifying. Cap nuts are not lock nuts; for vibration add a proper locking method or use a lock nut under a cap only if the stack-up allows.
Add sizes and quantities to the quote cart with coating and destination. Matching 4.8 bolts can be included.
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 1587
Material Type
Steel
Category
Cap Nut
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