Flange Bolt and Fine-Thread Hexagon Bolt Finder — DIN 6921, DIN 960 / DIN 961, ISO 8676 / ISO 8765 by Size and Length

Flange Bolt and Fine-Thread Hexagon Bolt Finder

Two families sit outside the plain DIN 931/933 series. Hexagon flange screws to DIN 6921 (EN 1665) have an integral washer face that spreads the bearing pressure and, in the serrated form, resists loosening without a separate lock washer; they are common on machine covers, guards and vehicle assemblies. Fine-pitch hexagon bolts to DIN 960 (part thread) and DIN 961 (full thread), or ISO 8765 and ISO 8676, use a reduced pitch (M8 × 1, M10 × 1.25, M12 × 1.5, M16 × 1.5, M20 × 1.5) for higher preload per turn, thinner walls and vibration-prone joints. The finder lists both families by thread, pitch and length with one column per material and finish.

Fine-pitch bolts need fine-pitch nuts (DIN 934 / ISO 8673 with the same pitch); a coarse nut will not start. Flange screws are matched with flange nuts DIN 6923 / ISO 4161 of the same serration type. Serrated flanges are intended for steel or hard surfaces; on aluminium or painted parts use the plain-flange form to avoid damaging the surface.

Coverage: 1,247 catalogue rows with a readable rating, of 18,458 in these categories. Each cell lists up to 2 part numbers per column; click a part number for the product page and a quotation.

DIN 6921 hexagon flange screws

DIN 960 / ISO 8765 fine thread, part thread

DIN 961 / ISO 8676 fine thread, full thread

Part numbers and designations are those of the original manufacturers and are given for identification. cBallast is an independent supplier; confirm ratings against the nameplate of the installed equipment before ordering. Table generated from the cBallast catalogue on 2026-09-29.

Compiled by cBallast for identification and cross-reference. Part numbers, designations and trademarks belong to their respective manufacturers. Confirm ratings and dimensions against the manufacturer's current documentation and the nameplate of the installed equipment before ordering or installation.