BS EN ISO 898-6 Proof Load

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BS EN ISO 898-6 Proof load values and Minimum Stripping Strength of nuts

Thread size d x P	Nominal stress area of mandrel A_s (mm²)	Property class
		04	05	5	6	8		10		12
		Proof load (A_s S_p) (N)
		-	-	style 1	style 1	style 1	style 2	style 1	style 2	style 2
M8 1	39.2	14 900	19 600	27 000	30 200	37 400	34 900	43 100	41 400	47 000
M10 1	64.5	24 500	32 200	44 500	49 700	61 600	57 400	71 000	68 000	77 400
M10 1.25	61.2	23 300	30 600	44 200	47 100	58 400	54 500	67 300	64 600	73 400
M12 1.25	92.1	35 000	46 000	63 500	71 800	88 000	82 000	102 200	97 200	110 500
M12 1.5	88.1	33 500	44 000	60 800	68 700	84 100	78 400	97 800	92 900	105 700
M14 1.5	125	47 500	62 500	86 300	97 500	119 400	111 200	138 800	131 900	150 000
M16 1.5	167	63 500	83 500	115 200	130 300	159 500	148 600	185 400	176 200	200 400
M18 1.5	215	81 700	107 500	154 800	187 000	221 500	-	-	232 200	-
M18 2	204	77 500	102 000	146 900	177 500	210 100	-	-	220 300	-
M20 1.5	272	103 400	136 000	195 800	236 600	280 200	-	-	293 800	-
M20 2	258	98 000	129 000	185 800	224 500	265 700	-	-	278 600	-
M22 1.5	333	126 500	166 500	239 800	289 700	343 000	-	-	359 600	-
M22 2	318	120 800	159 000	229 000	276 700	327 500	-	-	343 400	-
M24 2	384	145 900	192 000	276 500	334 100	395 500	-	-	414 700	-
M27 2	496	188 500	248 000	351 100	431 500	510 900	-	-	535 700	-
M30 2	621	236 000	310 500	447 100	540 300	639 600	-	-	670 700	-
M33 2	761	289 200	380 500	547 900	662 100	783 800	-	-	821 900	-
M36 3	865	328 700	432 500	622 800	804 400	942 800	-	-	934 200	-
M39 3	1 030	391 400	515 000	741 600	957 900	1 123 000	-	-	1 112 000	-

BS EN ISO 898-6: 1996 Table 4 Minimum stripping strength of nuts as a percentage of the proof load of bolts

Property class of the nut	Minimum stripping strength of nuts as a percentage of the proof load of bolts with property classes
Property class of the nut	6.8	8.8	10.9	12.9
04	98	65	45	40
05	100	85	60	50