Hex flange head titanium bolts (DIN 6921) & hex flange nuts (DIN 6923) — integrated circular flange eliminates the need for a separate flat washer.
DIN 6921 (bolts) & DIN 6923 (nuts) commonly referenced.
Integrated circular bearing flange under bolt head (DIN 6921) and nut base (DIN 6923). Serrated face available for anti-loosening. Plain (non-serrated) flange also supplied.
Six-sided hex drive. Head height reduced compared to standard DIN 933 hex bolts due to flange integration.
Metric coarse & fine pitch. Fully threaded bolts — flange bolts are DIN 6921, not partial thread.
Standard Range: M5–M20 (DIN 6921 / 6923). Lengths per DIN series.
Custom Supply: M4, M24+, custom serration profile, cut-to-length.
Stock Availability: M6–M12 in Gr2 & Gr5 (both plain and serrated flange).
Regular: Grade 2 (CP Ti) & Grade 5 (Ti-6Al-4V alloy).
Coordinated: Grade 1, Grade 7, Grade 9, Grade 23 — subject to order quantity.
Note: Serrated flange face creates a positive mechanical lock against the mating surface — do not use serrated flange bolts / nuts where a smooth mating surface is required (e.g. machined or polished parts).
DIN 6921 (hex flange bolt), DIN 6923 (hex flange nut). ISO 4162 / ISO 4161 international equivalents.
Custom serration profile (fine / coarse / custom tooth geometry), non-standard flange OD, special thread pitches, dry-film-lubricated variants and coatings coordinated per drawing.
Bag / box / wooden case per request. Bulk, small-lot and export packaging supported.
Compact assembly, reduced bolt count in battery pack and chassis applications.
Light-weight high-strength assemblies with vibration-resistant serrated flange.
Reduced part count and consistent load distribution in machinery assembly.
Corrosion-resistant joint with fewer crevices than three-piece bolt-washer-nut assemblies.
Flange bolt + flange nut: fewer components (2 vs 3), consistent load distribution, serrated face provides vibration resistance. Higher strength-to-diameter ratio due to larger flange bearing area.
Hex bolt + washer + nut: more standard and widely available, less tool-specific. Use when the mating surface must remain smooth (no serration teeth), or when a larger flange OD is required than the flange bolt provides. Specify your preference.
The bearing face of the flange has sharp radial teeth (serrations). When tightened against a metal mating surface, these teeth bite into the surface creating a positive mechanical lock that resists loosening under vibration and dynamic loads. Specify "serrated" or "plain" flange at inquiry — plain flanges have a smooth bearing face and do not provide this locking action.
No — the flange itself is the bearing face. Adding a washer under the flange head causes the flange to bear against the washer (which is not designed for serrated engagement), reducing the load distribution advantage. If you need a different bearing diameter than the flange provides, consider using a standard hex bolt with a larger-diameter flat washer instead.
Tell us diameter (e.g. M10), length (for bolts), serrated or plain flange, grade and quantity. For custom serration profile, specify after initial contact.
Helpful details: Diameter, Length, Serrated or Plain, Grade, Quantity (bolts & nuts if both required)
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