PREVAILING TORQUE METRIC HEX LOCK NUT (WITH NYLON INSERT) DIMENSIONS

"Prevailing Torque Metric Hex Lock Nut (with nylon insert) Dimensions" Calculator has been developed to show dimensions of prevailing torque metric hex lock nuts (with nylon insert) according to the ISO standards.

Some important notes from the ISO standards:

- ISO 7040 specifies the characteristics of prevailing torque type hexagon lock nuts (with nylon insert), style 1, with threads from M3 up to and including M36, with product grade A for threads d ≤ M16 and product grade B for threads d > M16.

- Mechanical properties of ISO 7040 hex lock nuts: Steel - Property class 5, 8, 10.

- ISO 7041 specifies the characteristics of prevailing torque type hexagon nuts (with nylon annular insert), style 2, with threads from M5 up to and including M36, with product grade A for threads d ≤ M16 and product grade B for threads d > M16.

- Mechanical properties of ISO 7041 hex lock nuts: Steel - Property class 9 and 12.

- ISO 10512 specifies the characteristics of prevailing torque type hexagon nuts (with nylon insert), style 1, with metric fine pitch thread with nominal thread diameters d from 8 mm up to and including 36 mm, with product grade A for threads d ≤ M16 and product grade B for threads d > M16.

- Mechanical properties of ISO 10512 hex lock nuts: Steel - Property class 6, 8 and 10. (Note: For d > 16 mm, property class 10 is not specified.)

Calculator:

INPUT PARAMETERS
Nominal metric hex lock nut size

 


Dimensions of Metric Hex Lock Nuts (With Non-Metal Insert)
Metric Nut Dimensions 
Size Product
Grade
Standard Thread
Series
Pitch da dw e h m mw s
max min min min max min min min max min
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Note 1: Dimensions are in mm.
Note 2: Requirements for electroplating are covered in ISO 4042 for steel nuts
Note 3: Non-preferred threads according to ISO standards: M14.
Note 4: Non-metallic insert material: Non - metallic (Ex. polyamide).
Note 5: Nut body material : steel.
Note 6: Thread Tolerance : 6H.
Note 7: m: Minimum thread height.
Note 8: mw: Minimum wrenching height.

Definitions:

Product Grade A, Grade B and Grade C: The product grades refer to the size of the tolerances where grade A is the most precise and grade C is the least precise as defined in the ISO 4759-1:2000 standard.


Supplements:



Link Usage
Metric Thread Size and Tolerance Calculator Calculates basic major, minor and pitch diameters of the metric external (bolt) thread and internal (nut) thread according to ISO 724:1993 standard. In addition to basic size calculations, tolerance calculations of different tolerance classes can be done according to ISO 965-1:1998 and ISO 965-2:1998 standards.
Nut Grades, Identification Markings and Strength (Metric) Shows proof strength and Vickers and Brinell hardness values of metric nuts made of carbon steel and alloy steel.
Prevailing Torque Values of Lock Nuts (Metric) Shows prevailing-on torque and prevailing-off torque values of metric lock nuts.

Reference:
  • ISO 7040:1997, Prevailing torque type hexagon nuts (with non-metallic insert), style 1 — Property classes 5, 8 and 10
  • ISO 7041:1997, Prevailing torque type hexagon nuts (with non-metallic insert), style 2 — Property classes 9 and 12
  • ISO 10512:1997, Prevailing torque type hexagon nuts (with non-metallic insert), style 1, with metric fine pitch thread — Property classes 6, 8 and 10
  • ISO 4759-1:2000, Hexagon nuts — Bolts, screws, studs and nuts — Product grades A, B and C