Bolt with Countersunk Head and Square Head-Rest GOST 7786-81

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Ploughshare Bolt with Countersunk Head and Square Head-Rest.

Analogues DIN 608, BS 4933.

Size Range	И10-М12
Grade of Accuracy	С
Thread Tolerance Range	6g 8g
Grade of Bolt Strength	3.6 4.6 4.8 5.8
Steel Grade	20Г2Р, 10кп, 20кп

d	6	8	10	12	14	16	18	20	22	24	27
thread pitch	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3
k	4	5	6	7	8	9	10	11	12	13	15
D	10.9	13.1	15.3	18.7	20.9	23.9	26.2	29.6	33.0	35.0	39.6
V	6	8	10	12	14	16	18	20	22	24	27
b	18	22	26	30	34	38	42	46	50	54	60
L	28-60	35-100	40-130	45-130	55-130	60-130	65-130	70-130	75-130	80-130	90-130

Theoretical Weight of 1000 bolts (kg)
Bolt Length L, mm	Bolt Diameter d, mm
	5	6	8	10	12	16	20
20	2.908	-	-	-	-	-	-
25	3.498	5.240	9.66	16.40	-	-	-
30	4.080	6.086	11.20	18.84	30.19	-	-
35	4.678	6.932	12.74	21.28	33.73	-	-
40	5.268	7.777	14.28	23.72	37.27	71.73	-
45	5.859	8.621	15.81	26.16	40.81	78.04	-
50	6.448	9.466	17.35	28.61	44.35	84.37	131.7
55	7.038	10.311	18.89	31.05	47.89	91.09	141.9
60	7.628	11.156	20.43	33.49	51.43	97,62	152.1
65	8.218	12.001	21.97	35.93	54.97	104,15	162,4
70	8.808	12.845	23.51	38.38	58.51	110.67	172.6
75	9.399	13.690	25.05	40.82	62.05	117.20	182.3
80	9.989	14.535	26.59	43.28	65.59	123.73	193.1
90	-	16.225	29.67	48.27	72.67	136.78	213.5
100	-	-	32.75	56.08	79.75	149.84	234.0
110	-	-	-	58.04	86.83	162.89	254.5
120	-	-	-	62.92	93.91	175.94	274.9
130	-	-	-	67.81	100.99	188.10	295.4
140	-	-	-	72.69	108.07	202.05	315.9
150	-	-	-	77.58	115.15	215.11	336.3
160	-	-	-	-	122.23	228.16	356.8
170	-	-	-	-	129.31	241.21	377.3
180	-	-	-	-	136.39	254.26	397.7
190	-	-	-	-	143.47	267.31	418.2
200	-	-	-	-	150.55	280.36	438.7