Philidas Industrial Self Locking Nut, Metric Sizes
This datasheet provides technical specifications, dimensions and tolerances for Philidas Industrial all-metal self-locking nuts with metric threads, available from Westfield Fasteners.
Philidas Industrial all-metal self-locking nuts feature a one-piece construction with an integral locking feature that creates friction between the mating nut and bolt threads. This produces a prevailing torque that helps resist loosening caused by vibration.
Their relatively high prevailing torque makes them suitable for demanding applications, including industrial machinery, automotive, rail and mining equipment.
Unlike nylon-insert locking nuts, their all-metal construction allows them to be used over a wider range of operating temperatures, subject to the applicable material and product specifications. They are designed to be reused.
Figure 1: Philidas Industrial All-Metal Self-Locking Nut
Table 1: Dimensions and Tolerances (mm)
| Thread Diameter, d | Pitch, p | Width Across the Flats, s | Width Corner to Corner, e | Overall Height, b | Wrenching Height, m | Bearing Face, dw | Diameter of Bearing Face, da | ||
|---|---|---|---|---|---|---|---|---|---|
| min. | max. | nom. | nom. | min. | max. | ||||
| M3 | 0.5 | 5.32 | 5.50 | 6.01 | 4.5 | 2.5 | 4.50 | 3.0 | 3.45 |
| M4 | 0.7 | 6.78 | 7.00 | 7.66 | 5.4 | 3.3 | 5.90 | 4.0 | 4.60 |
| M5 | 0.8 | 7.78 | 8.00 | 8.79 | 6.5 | 4.3 | 6.90 | 5.0 | 5.75 |
| M6 | 1.0 | 9.78 | 10.00 | 11.05 | 7.5 | 5.0 | 8.90 | 6.0 | 6.75 |
| M8 | 1.25 | 12.73 | 13.00 | 14.38 | 8.5 | 5.7 | 11.60 | 8.0 | 8.75 |
| M10 | 1.5 | 16.73 | 17.00 | 18.90 | 11.0 | 8.0 | 15.60 | 10.0 | 10.80 |
| M12 | 1.75 | 18.67 | 19.00 | 21.10 | 13.0 | 9.5 | 17.40 | 12.0 | 13.0 |
| M14 | 2.0 | 21.67 | 22.00 | 24.49 | 15.0 | 11.0 | 20.50 | 14.0 | 15.10 |
| M16 | 2.0 | 23.67 | 24.00 | 26.75 | 17.0 | 12.8 | 22.50 | 16.0 | 17.30 |
| M18 | 2.5 | 26.16 | 27.00 | 29.56 | 20.0 | 15.5 | 24.90 | 18.0 | 19.50 |
| M20 | 2.5 | 29.16 | 30.00 | 32.95 | 22.0 | 17.5 | 27.70 | 20.0 | 21.60 |
| M22 | 2.5 | 31.0 | 32.00 | 35.03 | 23.0 | 18.0 | 29.50 | 22.0 | 23.70 |
| M24 | 3.0 | 35.0 | 36.00 | 39.55 | 25.0 | 19.5 | 33.20 | 24.0 | 25.90 |
| M27 | 3.0 | 40.0 | 41.00 | 45.20 | 28.0 | 22.0 | 38.0 | 27.0 | 29.10 |
| M30 | 3.5 | 45.0 | 46.00 | 50.85 | 31.0 | 24.5 | 42.70 | 30.0 | 32.40 |
| M33 | 3.5 | 49.0 | 50.00 | 55.37 | 33.0 | 26.2 | 46.60 | 33.0 | 35.60 |
| M36 | 4.0 | 53.8 | 55.00 | 60.79 | 36.0 | 28.6 | 51.10 | 36.0 | 38.90 |
| M39 | 4.0 | 58.8 | 60.00 | 66.44 | 39.0 | 31.1 | 55.90 | 39.0 | 42.10 |
The following table summarises the available materials, mechanical properties and applicable specifications for this range of nuts. Material grades and property classes may vary according to the nominal thread size.
| Material Code | Description | Grade / Spec. | Stress Under Proof Load (MPa) |
|---|---|---|---|
| YZP-8 | Zinc Plated Steel with Yellow Passivate | Class 8 | 800 |
| Available on Request: | |||
| A2 | A2-70 Stainless Steel | A2-70 | 700 |
| A4 | A4-80 Stainless Steel | A4-80 | 800 |