Wave Washer M70x79 65Mn Spring Steel

Wave Washer M70x79 65Mn Spring Steel — stocked and shipped worldwide by SFX Fasteners. Available for single-piece retail orders — no minimum order — dispatched from our own warehouse within 24–48 hours.

Technische Daten

Bestellung & Versand

Sie brauchen eine bestimmte Größe, Festigkeitsklasse oder Norm? Senden Sie uns eine Anfrage – wir kalkulieren nach Zeichnung und nach DIN-, ANSI-, GB- und JIS-Normen.

Über diese Unterlegscheibe

This is a washer in 65Mn Spring Steel, at strength class Grade 4.8, supplied black oxide, with an M70 thread and a 79 mm length. Every dimension is stated against the standard named above; where a tolerance class matters to your design, ask us and we will confirm it in writing before you order.

A washer spreads the clamp load of the fastener over a wider area of the joint face and keeps the turning nut or head from scoring the part underneath. Fitted under bolts, screws and nuts on soft or painted surfaces, slotted holes, and any joint that is taken apart often enough for the face to matter.

Black oxide is a conversion coating about 1–2 µm thick, usually oiled. It adds mild corrosion resistance and keeps dimensions exact, which matters on 10.9 and 12.9 parts — there is no hydrogen embrittlement risk.

Grade 4.8 is low-carbon steel at 400 MPa tensile / 320 MPa yield. Suitable for light-duty, non-critical joints and the cheapest option per piece.

Sold by the piece, so one is a valid order. Stock lines leave our warehouse within 24–48 hours of cleared payment, and freight is calculated at checkout from the packed weight and the destination.