All-Metal Prevailing Torque Nut

ISO 7042 (Current)

Material: Stainless Steel, Carbon Steel
Property Class: A2-70, A4-80, 6, 8 and more
Finish: Passivated, Plain, Zinc Plated, Dacromet
Size range: M5–M36

TDSAll-Metal Prevailing Torque Nut ISO 7042 - ISO 7042Download PDF

Select sizes and quantities — 10 confirmed sizes to ISO 7042

Material

Grade

Stainless SteelCarbon Steel

Finish

Find a size

dNominal Diameter (mm)	PThread Pitch (mm)	sWidth Across Flats (max) (mm)	eWidth Across Corners (min) (mm)	daUnderhead Diameter (max) (mm)	daClearance Diameter (min) (mm)	MOQ
M5	0.8	8	8.79	5.75	5	1000
M6	1	10	11.05	6.75	6	1000
M8	1.25	13	14.38	8.75	8	600
M10	1.5	16	17.77	10.8	10	600
M12	1.75	18	20.03	13	12	400
M16	2	24	26.75	17.3	16	400
M20	2.5	30	32.95	21.6	20	200
M24	3	36	39.55	25.9	24	200
M30	3.5	46	50.85	32.4	30	200
M36	4	55	60.79	38.9	36	200

Showing 10 of 10 sizes

M5 × 0.8 × 8 × 8.79 × 5.75 × 5 × 6.88 × 5.1 × 4.8 × 3.52 × 7.78

dNominal Diameter (mm)M5

PThread Pitch (mm)0.8

sWidth Across Flats (max) (mm)8

eWidth Across Corners (min) (mm)8.79

daUnderhead Diameter (max) (mm)5.75

daClearance Diameter (min) (mm)5

MOQ1000

M6 × 1 × 10 × 11.05 × 6.75 × 6 × 8.88 × 6 × 5.4 × 3.92 × 9.78

dNominal Diameter (mm)M6

PThread Pitch (mm)1

sWidth Across Flats (max) (mm)10

eWidth Across Corners (min) (mm)11.05

daUnderhead Diameter (max) (mm)6.75

daClearance Diameter (min) (mm)6

MOQ1000

M8 × 1.25 × 13 × 14.38 × 8.75 × 8 × 11.63 × 8 × 7.14 × 5.15 × 12.73

dNominal Diameter (mm)M8

PThread Pitch (mm)1.25

sWidth Across Flats (max) (mm)13

eWidth Across Corners (min) (mm)14.38

daUnderhead Diameter (max) (mm)8.75

daClearance Diameter (min) (mm)8

MOQ600

M10 × 1.5 × 16 × 17.77 × 10.8 × 10 × 14.63 × 10 × 8.94 × 6.43 × 15.73

dNominal Diameter (mm)M10

PThread Pitch (mm)1.5

sWidth Across Flats (max) (mm)16

eWidth Across Corners (min) (mm)17.77

daUnderhead Diameter (max) (mm)10.8

daClearance Diameter (min) (mm)10

MOQ600

M12 × 1.75 × 18 × 20.03 × 13 × 12 × 16.63 × 12 × 11.57 × 8.3 × 17.73

dNominal Diameter (mm)M12

PThread Pitch (mm)1.75

sWidth Across Flats (max) (mm)18

eWidth Across Corners (min) (mm)20.03

daUnderhead Diameter (max) (mm)13

daClearance Diameter (min) (mm)12

MOQ400

M16 × 2 × 24 × 26.75 × 17.3 × 16 × 22.49 × 16.4 × 15.7 × 11.28 × 23.67

dNominal Diameter (mm)M16

PThread Pitch (mm)2

sWidth Across Flats (max) (mm)24

eWidth Across Corners (min) (mm)26.75

daUnderhead Diameter (max) (mm)17.3

daClearance Diameter (min) (mm)16

MOQ400

M20 × 2.5 × 30 × 32.95 × 21.6 × 20 × 27.7 × 20.3 × 19 × 13.52 × 29.16

dNominal Diameter (mm)M20

PThread Pitch (mm)2.5

sWidth Across Flats (max) (mm)30

eWidth Across Corners (min) (mm)32.95

daUnderhead Diameter (max) (mm)21.6

daClearance Diameter (min) (mm)20

MOQ200

M24 × 3 × 36 × 39.55 × 25.9 × 24 × 33.25 × 23.9 × 22.6 × 16.16 × 35

dNominal Diameter (mm)M24

PThread Pitch (mm)3

sWidth Across Flats (max) (mm)36

eWidth Across Corners (min) (mm)39.55

daUnderhead Diameter (max) (mm)25.9

daClearance Diameter (min) (mm)24

MOQ200

M30 × 3.5 × 46 × 50.85 × 32.4 × 30 × 42.75 × 30 × 27.3 × 19.44 × 45

dNominal Diameter (mm)M30

PThread Pitch (mm)3.5

sWidth Across Flats (max) (mm)46

eWidth Across Corners (min) (mm)50.85

daUnderhead Diameter (max) (mm)32.4

daClearance Diameter (min) (mm)30

MOQ200

M36 × 4 × 55 × 60.79 × 38.9 × 36 × 51.11 × 36 × 33.1 × 23.52 × 53.8

dNominal Diameter (mm)M36

PThread Pitch (mm)4

sWidth Across Flats (max) (mm)55

eWidth Across Corners (min) (mm)60.79

daUnderhead Diameter (max) (mm)38.9

daClearance Diameter (min) (mm)36

MOQ200

Product details

Description: This all-metal prevailing torque lock nut is produced to ISO 7042. The one-piece design resists loosening through controlled thread deformation, eliminating the need for separate locking elements. It is supplied in carbon steel and stainless steel, with property classes 6, 8, 10 and grades A2-70, A4-80. Surface finishes include zinc plating, Dacromet, plain, and passivated. Sizes range from M5 to M36. When requesting a quotation, specify the diameter, material, grade, finish, and required quantity.
Features: Hexagon body driven by standard spanners and sockets · All-metal one-piece construction with prevailing torque locking feature · Available in diameters M5 to M36 · Supplied in carbon steel and stainless steel with multiple finishes
Applications: Joints subject to vibration, Machinery and moving equipment, Automotive and vehicle assembly

Order assurance

Confirmed for the quoted product and order.

Reports & inspection

Agreed in the quotation.

EN 10204 3.1 material certificate
Dimensional inspection report
Certificate of conformity
Mechanical test report
Chemical analysis report
Coating inspection report
Batch and lot traceability

Packaging & delivery

Options we supply.

Bulk carton packing
Small boxes with outer cartons
Palletized shipment
Fumigation-free pallets
Inner poly bags
Buyer branding and labels

Product questions

What sizes of All-Metal Prevailing Torque Nut do you supply?

Execution standard: ISO 7042. The confirmed specification table covers M5–M36 diameters. Use the specification table to select the exact variant required for quotation.

Which materials, grades and finishes can I order?

Material: Stainless Steel, Carbon Steel; Property class: A2-70, A4-80, 6, 8, 10; Finish: Passivated, Plain, Zinc Plated, Dacromet. Availability should be confirmed against the selected specification and order quantity.

Where are these locking nuts typically used?

Typical applications include Joints subject to vibration, Machinery and moving equipment, Automotive and vehicle assembly. Final suitability depends on the selected material, grade, finish and operating conditions.