NUTS
DIN 557 Square Nuts
Square Nuts for specified threaded assemblies, with engagement and mating dimensions reviewed.
Product Overview
A square external profile can be retained by a matching pocket or channel and provides broad wrenching faces. The mating recess should allow the nut to seat while limiting unwanted rotation. This family is distinct from thin square nuts, with thickness and across-flats dimensions that must match the intended pocket.
Specify thread diameter and pitch, required material, finish and the mating bolt or rod. Include space restrictions and any inspection or proof-load requirement. The requested configuration and packaging must be confirmed before ordering.
Key Features
- Square external profile
- Metric internal thread
- Pocket-compatible geometry when specified
Specifications
- Standard
- DIN 557:2026-02
- Grade
- Subject to specification/size
- Diameter
- Specify nominal diameter in RFQ
- Thread type
- Metric machine thread; pitch to be specified
Materials & Finishes
- Material
- Material to be agreed for the thread and service conditions
- Finish
- Subject to material, service conditions and specification
Typical Applications
- Captive nut pockets
- Channel assemblies
- General hardware
Size Range / Technical Notes
- Size Range
- Specify thread, across-flats size, thickness and pocket clearance. Exact size and material combinations require confirmation.
- Technical Notes
- DIN 557:2026-02 replaces the 1994-01 edition. Product grade C is a dimensional classification, not a mechanical strength grade. Confirm dimensions to the ordered edition.
Packaging & Customization
- Packing
- Packing method and pack quantity to be agreed
- MOQ
- Subject to specification/size and order quantity
- Customization Notes
- Submit drawings, finish requirements and packaging or marking requests for feasibility review. Custom production and OEM support require separate confirmation.