DIN 267-24
DIN 267 Part 24:2007
Technical Delivery Conditions
Hardness classes for nuts without specified proof load values
This standard contains hardness classes for nuts whose properties (usually the shape and dimensions) are such that they cannot be assigned definite load values but can only be classified according to their hardness and marked accordingly.
Field of Application
This does not apply to nuts which
- are subjected to proof loads to DIN EN 20898-2 and DIN EN ISO 898-6
- prevailing torque type nuts to DIN EN ISO 2320
- are weldable
- have corrosion resistance (DIN EN ISO 3506-2
- used in temperatures above 300°C or below -50°C (DIN 267 Part 13)
Nuts made from free-cutting steel shall not be used above 250°C.
Mechanical Properties Table
These properties apply for testing at standard room temperature and pressure.
Hardness Class |
||||
| Mechanical Properties | 11H | 14H | 17H | 22H |
| Vickers Hardness HV5 (min) | 110 | 140 | 170 | 220 |
| Vickers Hardness HV5 (max) | 185 | 215 | 245 | 300 |
| Brinell Hardness HBW30 (min) | 105 | 133 | 162 | 209 |
| Brinell Hardness HBW30 (max) | 176 | 204 | 233 | 285 |
Chemical Composition Table
|
Chemical Composition % by mass |
||||
|
Hardness Class |
C max |
Mn min |
P max |
S max |
| 11H | 0.50 | - | 0.110 | 0.150 |
| 14H | 0.50 | - | 0.110 | 0.150 |
| 17H | 0.58 | 0.30 | 0.060 | 0.150 |
| 22H | 0.58 | 0.30 | 0.048 | 0.058 |
Nuts of hardness class 22H shall be quenched and tempered.
Chemical Composition Table - Free Cutting Steels
|
Chemical Composition % by mass |
||||
|
Hardness Class |
C max |
Mn min |
P max |
S max |
| 11H, 14H, 17H | 0.50 | 0.12 | 0.35 | 0.34 |
Specifications and Allowed Sizes as Specified to DIN 267-24:2007
C= Coarse Pitch
F= Fine Pitch
Fastener Ranges are given for each grade of fastener as specified within DIN 267-24 specification.
| STANDARD | DESCRIPTION | PITCH | RANGE | 11H | 14H | 17H | 22H |
|---|---|---|---|---|---|---|---|
| DIN 431:2000 | Pipe Nuts | ISO 228 | G1/8-G6 | G1/8-G6 | |||
| DIN 439-1:1987 | Unchamfered Lock Nuts | C | M1.6-M10 | M1.6-M10 | |||
| DIN 439-1:1987 | Unchamfered Lock Nuts | F | M8-M10 | M8-M10 | |||
| DIN 439-2:1987 | Lock Nuts | C | M1.6-M52 | M1.6-M3 | |||
| DIN 936:1985 | Lock Nuts | C, F | M8-M52 | M18-M52 | M18-M52 | ||
| DIN 937:1983 | Thin Slotted Nuts | C | M6-M52 | M6-M52 | M6-M52 | M6-M52 | |
| DIN 937:1983 | Thin Slotted Nuts | F | M8-M52 | M8-M52 | M8-M52 | M8-M52 | |
| DIN 937:1983 | Thin Castle Nuts | C, F | M12-M52 | M12-M52 | M12-M52 | M12-M52 | |
| DIN 981:2009 | Roller Bearing Nuts | F | M10-M200 | M10-M200 | |||
| DIN 80705:1990 | Thin Hex Panel Nuts | F | M12-M52 | M12-M52 | |||
| DIN 80705:1990 | Thin Octagonal Panel Nuts | F | M56-M140 | M56-M140 |