Key Stock Specifications (Square, Rectangular, Flat)

Documents

Shipments are backed by Mill Test Certificate (MTC), Dimensional Report, Salt Spray Test Report on request, with full batch traceability from raw material to finished product. Quality management follows the owner-confirmed compliance list: ISO 9001:2015, RoHS, REACH. Exact document sets are confirmed on the order.

Quotation

• The fastener family (Key Stock Specifications (Square, Rectangular, Flat)) plus the standard designation from your drawing — DIN / ISO / JIS / ASTM / ANSI, or a drawing for custom parts.
• Size (diameter and length), thread type (metric or inch), property class or grade, and coating or finish.
• Quantity per size and your target delivery date.
• Destination country, and any required documents (for example a mill test certificate) so the quote includes them.

Sample & supply

Minimum order quantity is 10,000 pieces. Stock items run 3–7 days. Quantities or variants outside the standard range are confirmed at quotation.

Storage & shipping

Parts are packed for export and shipped factory-direct to buyers in Europe, Asia, the Americas and the Middle East. Store fasteners dry and protected until installation, and keep coated parts in their packaging until use; specific packing and preservation requirements can be stated on the order and confirmed at quotation.

How do I pick between square, rectangular and flat key stock for a repair?

Match the keyway, not a preference: measure the keyway's width and depth on the shaft and the hub, and the section follows — the tables here then give you the stock's tolerance class and weight check. Where you are re-creating from the shaft size instead, the DIN key standards' section tables (the family's DIN 6885 page carries the per-shaft ladder) name the section, and this page tells you what the raw stock looks like: square sections up to 22×22 for the smaller shafts, rectangular where the standard calls a b x h pair (the 8×7, 12×8, 16×10... ladder that carries most industrial torque), flat rectangular where the keyway must stay shallow in a thin hub. The footnotes matter at the edges: bracketed sizes ((63×32), (80×40)) are drawing-derived stock, not primary rolled dimensions, so expect them as cut stock rather than shelf items; and the asterisked 90 x 45 has no primary stock at all — it is quoted as machined. Say the section and the key standard on the RFQ and the form is confirmed against stock availability before quote.

What does 'permissible variations ... ISO tolerance zone h9' mean for the key I am about to file?

It is the width tolerance the key standard assumes: h9 sits at nominal and slightly under (12×12: -0.043 as printed), so a key cut from this stock slides into an h9-width keyway with a controlled clearance rather than needing hand fitting — and the keyway in the hub is cut to its own matching tolerance so the pair works as a system. The practical consequences: do not size keys by grinding below the h9 floor 'to make them fit' — an undersized key rocks under torque and works the keyway; and if a key is truly tight, the error is more often the keyway's tolerance or burrs than the stock. The h11 column on the height of the rectangular and flat tables gives the height its own (looser) control, which is where the 'fits the keyway depth' dimension lives. When a repair demands more than h9/h11 control — a keyed interface under reversing loads, for instance — that is a quote line: keys and keyways to a tighter specified zone are supplied against the drawing with inspection, not selected from stock by feel.