Steel Nylon-Insert Lock Nut, Class 8
ISO 898-2 class 8 nylon-insert lock nuts to DIN 985 / ISO 10511. Standard prevailing-torque nut for class 8.8 bolts on vibrating machinery and plant equipment. Listed M3–M39.
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Available Sizes & Finishes
19 sizes available
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Applications & Selection Guide
ISO 898-2 class 8 nylon-insert lock nuts to DIN 985 / ISO 10511. Quenched-and-tempered hex body with a nylon prevailing-torque ring — the standard vibration-resistant nut for class 8.8 bolts. Listed M3–M39.
Specify on conveyors, fans, mobile plant, and any 8.8 joint that must not back off in service. Keep the nut class matched to the bolt. Where temperature, solvents, or paint-bake cycles would damage nylon, switch to DIN 980 class 8 all-metal lock nuts. The insert does not replace correct preload or a hardened washer where the joint design needs one.
Request a quote with M sizes, quantities, finish, and delivery country. Matching 8.8 bolts and washers 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 8
Manufacturing Standard
DIN 985 / ISO 10511
Material Type
Steel
Category
Nylon-Insert Lock Nut
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