DINCurrentDraft · single source

DIN 981

Slotted lock nuts for rolling bearings (KM)

National equivalents

CSN 023630

Head · drive: Slots for hook spanner
Thread: Metric ISO fine thread
Tolerance: 6H
Property classes: 11HA2
Materials: SteelStainless

Dimensions

mm · values as the standard states them

Size	P	h	b	t	d2	d3	marking	mass	z
M10x0.75	0.75	4 h13	3 JS14	2 H17	18 n13	13.5 h13	KM0	0.004	0.04
M12x1	1	4 h13	3 JS14	2 H17	22 n13	17 h13	KM1	0.007	0.04
M15x1	1	5 h13	4 JS14	2 H17	25 n13	21 h13	KM2	0.01	0.04
M17x1	1	5 h13	4 JS14	2 H17	28 n13	24 h13	KM3	0.013	0.04
M20x1	1	6 h13	4 JS14	2 H17	32 n13	26 h13	KM4	0.019	0.04
M24x1.5	1.5	7 h13	5 JS14	2 H17	38 n13	32 h13	KM5	0.025	0.04
M30x1.5	1.5	7 h13	5 JS14	2 H17	45 n13	38 h13	KM6	0.043	0.04
M35x1.5	1.5	8 h13	5 JS14	2 H17	52 n13	44 h13	KM7	0.053	0.04
M40x1.5	1.5	9 h13	6 JS14	2.5 H17	58 n13	50 h13	KM8	0.085	0.04
M45x1.5	1.5	10 h13	6 JS14	2.5 H17	65 n13	56 h13	KM9	0.119	0.04
M50x1.5	1.5	11 h13	6 JS14	2.5 H17	70 n13	61 h13	KM10	0.148	0.04
M55x2	2	11 h13	7 JS14	3 H17	75 n13	67 h13	KM11	0.158	0.05
M60x2	2	11 h13	7 JS14	3 H17	80 n13	73 h13	KM12	0.174	0.05
M65x2	2	12 h13	7 JS14	3 H17	85 n13	79 h13	KM13	0.203	0.05
M70x2	2	12 h13	8 JS14	3.5 H17	92 n13	85 h13	KM14	0.242	0.05
M75x2	2	13 h13	8 JS14	3.5 H17	98 n13	90 h13	KM15	0.287	0.05
M80x2	2	15 h13	8 JS14	3.5 H17	105 n13	95 h13	KM16	0.397	0.05
M85x2	2	16 h13	8 JS14	3.5 H17	110 n13	102 h13	KM17	0.451	0.05
M90x2	2	16 h13	10 JS14	4 H17	120 n13	108 h13	KM18	0.556	0.05
M95x2	2	17 h13	10 JS14	4 H17	125 n13	113 h13	KM19	0.658	0.05
M100x2	2	18 h13	10 JS14	4 H17	130 n13	120 h13	KM20	0.698	0.05
M105x2	2	18 h13	12 JS14	5 H17	140 n13	126 h13	KM21	0.845	0.05
M110x2	2	19 h13	12 JS14	5 H17	145 n13	133 h13	KM22	0.965	0.05
M115x2	2	19 h13	12 JS14	5 H17	150 n13	137 h13	KM23	1.01	0.05
M120x2	2	20 h13	12 JS14	5 H17	155 n13	138 h13	KM24	1.08	0.05
M125x2	2	21 h13	12 JS14	5 H17	160 n13	148 h13	KM25	1.19	0.05
M130x2	2	21 h13	12 JS14	5 H17	165 n13	149 h13	KM26	1.25	0.06
M135x2	2	22 h13	14 JS14	6 H17	175 n13	160 h13	KM27	1.55	0.06
M140x2	2	22 h13	—	5 H17	—	—	KML28	0.99	0.06

Ranges read min – max; ≤ / ≥ where the standard gives one limit, ≈ for approximate values. Sizes in (brackets) are non-preferred. Select a row for its size sheet.

Size sheet · DIN 981

M70x2

h: height of the nut; 12
b: width of the notch; 8
t: notch depth; 3.5
d2: inner diameter of the nut; 92
d3: spacing; 85
marking: KM14
mass: mass per 1000 pieces (kg); 0.242
z: 0.05

Provenance

Draft — values taken from a single source and not yet cross-checked.

fasteners.eudimensions, lengths, materials, property classes, current norm, equivalent norms

Accessed 2026-09-23 · For design and safety-critical use, consult the current edition of the standard.

Data notes (1)

3 value(s) omitted after consistency checks: M140x2 d2: value 165 breaks the size progression — omitted as a probable source typo; M140x2 d3: value 155 breaks the size progression — omitted as a probable source typo; M140x2 b: value 12 breaks the size progression — omitted as a probable source typo

Same product type

ISO 7040 — Prevailing torque hexagon regular nuts with non-metallic insert ISO 7042 — Prevailing torque all-metal hexagon high nuts ISO 10511 — Prevailing torque hexagon thin nuts with non-metallic insert DIN 980 — Prevailing torque all-metal hexagon nuts All 12 standards of this type →

Dimensions

Help verify the next 50 standards.