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Metric Class 04 Hex Jam Nut, DIN 439B, Plain
Our Metric Class 04 Hex Jam Nuts manufactured to DIN 439B with a Plain Finish are low‑profile fastening components designed for metric assemblies where reduced nut height and precise adjustment are required. Produced from carbon steel and rated to property class 04, these jam nuts provide reliable performance for light‑duty and general‑purpose mechanical applications.
The DIN 439B standard specifies a thinner hex nut profile compared to standard hex nuts, making these jam nuts ideal for space‑restricted installations or for use in double‑nut locking configurations to help resist loosening due to vibration. The plain, uncoated finish preserves full material integrity and is suitable for controlled environments, indoor applications, or assemblies where additional surface treatments will be applied after installation.
Designed for versatility and dimensional accuracy, DIN 439B Class 04 Metric Hex Jam Nuts are commonly used in machinery, equipment assemblies, maintenance applications, fixtures, and adjustment mechanisms. Their reduced thickness allows fine positioning on threaded shafts and studs while maintaining consistent wrench engagement. Available in a wide range of metric thread sizes, these jam nuts provide a cost‑effective solution for OEM production, repair, and maintenance where moderate strength and compact fastening are required.
