Description
ISO 10511 M12-A4 Nut, Steel, Prevailing Torque Type Hexagon Thin — BOLTON SKU 56559.
About the ISO 10511 M12-A4 Nut, Steel, Prevailing Torque
The ISO 10511 M12-A4 Nut Steel Prevailing torque hexagon thin nut is a metric locknut manufactured to ISO 10511, the international standard for prevailing torque hexagon thin nuts with a non-metallic insert. The polymer insert grips the mating thread to resist self-loosening under vibration, without damaging the bolt thread. This item is the M12 size — metric coarse pitch — in stainless steel property class A4, the acid-resistant austenitic grade defined for fasteners in ISO 3506. ISO 10511 covers coarse-thread sizes M3 to M39 in steel and stainless steel; sizes up to and including M16 are produced to product grade A. As a thin (low-profile) style nut, it has reduced load capability compared with regular-height prevailing torque nuts and is not designed to resist thread stripping at full bolt load — a standard-level characteristic to consider at joint design.
Key specifications
| Standard | ISO 10511 |
|---|---|
| Type | Prevailing torque hexagon thin nut, non-metallic insert |
| Thread size | M12, metric coarse pitch |
| Material | Stainless steel, grade A4 (ISO 3506) |
| Product grade | A (sizes up to M16) |
| Locking feature | Non-metallic (polymer) insert |
Typical applications
M12 A4 thin locknuts are chosen where a vibration-resistant secondary nut or low-profile locking element is needed in corrosive environments — marine and coastal installations, chemical plant and exterior equipment. The thin style is frequently run against a plain nut as a jam-type locking arrangement on M12 studs and bolts.
Supplied by BOLTON Technical Equipment Supplies against request for quotation. Add this item to your RFQ basket to request pricing, lead time and documentation requirements (e.g. CoC, datasheets or test reports where applicable).
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