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DIN961 Fine Full Thread 8.8 M64 Metric Hex Cap Screws

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DIN961 Fine Full Thread 8.8 M64 Metric Hex Cap Screws

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Brand Name :	QBH
Model Number :	DIN961
Certification :	ISO9001
Price :	Negotiation
Payment Terms :	L/C, T/T
Supply Ability :	500TON/MONTH
Delivery Time :	30DAYS

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DIN961 Fine Full Thread 8.8 M64 Metric Hex Cap Screws

Specification

DIN 961 Hex Head Cap Screws are fully threaded and have fine or extra fine external machine screw threads (the distance from thread to thread is less than for coarse threads). Having dimensions that are similar to ISO 8675, use with tapped holes and nuts. Class 8.8 and 10.9 steel are available; zinc plating provides corrosion protection while plain finish is unplated and can rust. The thread tolerance of Class 8.8 and 10.9 is 6g for plain finish and 6h for plated; right-hand threads are standard. Sometimes called hex head bolts and tap bolts, the length of the bolt is measured from under the head to the tip. DIN 961 Hex Head Cap Screws are similar to ISO 8675 and JIS B1180. For comparison, DIN 960 is partially threaded and DIN 933 is fully threaded but has coarse threads.

DIN 961 - Hexagon head bolts with fine thread up to head

Current norm: DIN EN 24017
Equivalent norms: ISO 4017; CSN 021103; PN 82105; UNI 5739; EU 24017

DIN961 Fine Full Thread 8.8 M64 Metric Hex Cap Screws

Legend:

l - length of bolt
d - the nominal diameter of the thread
k - head height
r - radius
e - the diameter of the circumscribed circle (not less than)
s - size hex head turnkey
c - thickness of the mounting collar
a - length undercut

Makings:QBH

Steel: 5.6,5.8,8.8,10.9,12.9
Stainless: A2,A4
Plastic: Plastic Pa
Non Ferrous: Brass
Thread: 6g

Table according to DIN 961

Screw Thread
d

P	Pitch	Fine thread-1
		Fine thread-2
a	max
c	min
	max
d_a	max
d_w	Grade A	min
	Grade B	min
e	Grade A	min
	Grade B	min
k	Nominal Size
	Grade A	min
		max
	Grade B	min
		max
k₁	min
r	min
s	max=nominal size
	Grade A	min
	Grade B	min

1	1	1.5	1.5	1.5	2	1.5	2	2
-	1.25	1.25	-	-	1.5	2	1.5	1.5
3	3.75	4.5	4.5	4.5	6	6	6	6
0.15	0.15	0.15	0.15	0.2	0.2	0.2	0.2	0.2
0.6	0.6	0.6	0.6	0.8	0.8	0.8	0.8	0.8
9.2	11.2	13.7	15.7	17.7	20.2	22.4	24.4	26.4
11.6	15.6	17.4	20.5	22.5	25.3	28.2	30	33.6
11.4	15.4	17.2	20.1	22	24.8	27.7	29.5	33.2
14.38	18.9	21.1	24.49	26.75	30.14	33.53	35.72	39.98
14.2	18.72	20.88	23.91	26.17	29.56	32.95	35.03	39.55
5.3	6.4	7.5	8.8	10	11.5	12.5	14	15
5.15	6.22	7.32	8.62	9.82	11.28	12.28	13.78	14.78
5.45	6.58	7.68	8.98	10.18	11.72	12.72	14.22	15.22
5.06	6.11	7.21	8.51	9.71	11.15	12.15	13.65	14.65
5.54	6.69	7.79	9.09	10.29	11.85	12.85	14.35	15.35
3.54	4.28	5.05	5.96	6.8	7.8	8.5	9.6	10.3
0.4	0.4	0.6	0.6	0.6	0.6	0.8	0.8	0.8
13	17	19	22	24	27	30	32	36
12.73	16.73	18.67	21.67	23.67	26.67	29.67	31.61	35.38
12.57	16.57	18.48	21.16	23.16	26.16	29.16	31	35

Weight of per 1000 steel products(≈kg)

Screw Thread
d

P	Pitch	Fine thread-1
		Fine thread-2
a	max
c	min
	max
d_a	max
d_w	Grade A	min
	Grade B	min
e	Grade A	min
	Grade B	min
k	Nominal Size
	Grade A	min
		max
	Grade B	min
		max
k₁	min
r	min
s	max=nominal size
	Grade A	min
	Grade B	min

2	2	2	3	3	3	3	3	3
-	-	-	-	-	-	-	-	-
6	6	6	9	9	9	9	9	9
0.2	0.2	0.2	0.2	0.3	0.3	0.3	0.3	0.3
0.8	0.8	0.8	0.8	1	1	1	1	1
30.4	33.4	36.4	39.4	42.4	45.6	48.6	52.6	56.6
-	-	-	-	-	-	-	-	-
38	42.7	46.6	51.1	55.9	59.9	64.7	69.4	74.2
-	-	-	-	-	-	-	-	-
45.2	50.85	55.37	60.79	66.44	71.3	76.95	82.6	88.25
17	18.7	21	22.5	25	26	28	30	33
-	-	-	-	-	-	-	-	-
-	-	-	-	-	-	-	-	-
16.65	18.28	20.58	22.08	24.58	25.58	27.58	29.58	32.5
17.35	19.12	21.42	22.92	25.42	26.42	28.42	30.42	33.5
11.7	12.8	14.4	15.5	17.2	17.9	19.3	20.9	22.8
1	1	1	1	1	1.2	1.2	1.6	1.6
41	46	50	55	60	65	70	75	80
-	-	-	-	-	-	-	-	-
40	45	49	53.8	58.8	63.1	68.1	73.1	78.1

Process flow

Cold forging

Annealing treatment(if need) ➨ wiredrawing ➨ clod forging ➨ thread rolling ➨make heat treatment(if need) ➨ Finish ➨ Packing

Hot forging

Cutting material ➨ hot forging ➨ turning ➨ shrink diameter(half thread) ➨thread rolling ➨ make heat treatment(if need) ➨ Finish ➨ Packing

Product Grade

Class4.8 Class5.8 Class6.8 Class8.8 Class10.9 Class12.9

NO.	Mechanical or physical property		Property class
			4.6	4.8	5.6	5.8	6.8	8.8		9.8	10.9	12.9/12.9
			4.6	4.8	5.6	5.8	6.8	D≤16mm^a	d＞16mm^b	d≤16mm	10.9	12.9/12.9
1	Tensile strength R_m,Mpa	nom.^c	400		500		600	800		900	1000	1200
1	Tensile strength R_m,Mpa	max.	400	420	500	520	600	800	830	900	1040	1220
2	Lower yield strength R_eL,Mpa	nom.^c	240	——	300	——	——	——	——	——	——	——
2	Lower yield strength R_eL,Mpa	max.	240	——	300	——	——	——	——	——	——	——
3	Stress at 0,2 % nonproportional elongation R_p0.2,Mpa	nom.^c	——	——	——	——	——	640	640	720	900	1080
3	Stress at 0,2 % nonproportional elongation R_p0.2,Mpa	max.	——	——	——	——	——	640	660	720	940	1100
4	Stress at 0,0048 d non-proportional elongation for full-size fasteners R_p^f,Mpa	nom.^c	——	320	——	400	480	——	——	——	——	——
4		max.	——	340^e	——	420^e	480^e	——	——	——	——	——
5	Stress under proof load S_p^f,Mpa	nom.	225	310	280	380	440	580	600	650	830	970
5	Proof S_p,nom/R_{eL min} Or strength S_p,nom/R_p0.2min Or rati S_p,nom/R_{pf min}		0.94	0.91	0.93	0.9	0.92	0.91	0.91	0.9	0.88	0.88
6	Percentage elongation after fracture for machined test pieces,A,%	min.	22	-—	20	——	——	12	12	10	9	8
7	Percentage reduction of area after fracture for machined test pieces,Z,%	min.	——					52		48	48	44
8	Elongation after fracture for full-size fasteners,A_f	min.	——	0.24	——	0.22	0.2	——	——	——	——	——
9	Head soundness		No fracture
10	Vickers hardness, HV, F≥98N	min.	120	130	155	160	190	250	255	290	320	385
10	Vickers hardness, HV, F≥98N	max.	220^g				250	320	335	360	380	435
11	Brinell hardness, HBW ,F=30D²	min.	114	124	147	152	181	238	242	276	304	366
11	Brinell hardness, HBW ,F=30D²	max.	209^g				238	304	318	342	361	414
12	Rockwell hardness,HRB , HRB	min.	67	71	79	82	89
	Rockwell hardness,HRB , HRB	max.	95^g				99.5
	Rockwell hardness, HRC	min.	——					22	23	28	32	39
	Rockwell hardness, HRC	max.	——					32	34	37	39	44
13	Surface hardness HV 0.3	max.	——					h			h,j	h,j
14	Height of non-decarburized thread zone,E,mm	min.	——					1/2H₁			2/3H₁	3/4H₁
14	Depth of complete decarburization in the thread,G,mm	max.	——					0.015
15	Reduction of hardness after retempering,HV	max.	——					20
16	Breaking torque, M_B,N·m	min.	——					in accordance with ISO 898-7
17	Impact strength, K_V^K,I,J	min.	——		27	——		27	27	27	27	m
18	Surface integrity in accordance with		ISO 6157-1ⁿ									ISO 6157-3
a Values do not apply for structural bolting. b For structural bolting d W M12. c Nominal values are specified only for the purpose of the designation system for property classes.See Clause 5. d In cases where the lower yield strength ReL cannot be determined, it is permissible to measure the stress at 0,2 % non-proportional elongation Rp0,2. e For the property classes 4.8, 5.8 and 6.8 the values for Rpf min are under investigation. The present values are given for calculation of the proof stress ratio only. They are not test values. f Proof loads are specified in Tables 5 and 7. g Hardness determined at the end of a fastener shall be 250 HV, 238 HB or 99,5 HRB maximum. h Surface hardness shall not be more than 30 Vickers points above the measured core hardness of the fastener when determination of both surface hardness and core hardness are carried out with HV 0,3. i Any increase in hardness at the surface which indicates that the surface hardness exceeds 390 HV is not acceptable. j Any increase in hardness at the surface which indicates that the surface hardness exceeds 435 HV is not acceptable. k Values are determined at a test temperature of −20 °C, see 9.14. l Applies to d W 16 mm. m Value for KV is under investigation. n Instead of ISO 6157-1, ISO 6157-3 may apply by agreement between the manufacturer and the purchaser.

Materials and Chemical compstition

1008

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Al
0.06	0.06	0.33	0.013	0.003	0.01	0	0.01	0.028

1035

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.34	0.13	0.73	0.012	0.002	0.02	0.01	0.02

10B21

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	B
0.2	0.04	0.81	0.017	0.007	0.017	0.0021

1045

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.45	0.23	0.58	0.014	0.006	0.057	0.008	0.016

40CR

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.4	0.21	0.54	0.015	0.008	0.95	0.02	0.02

35CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.35	0.22	0.59	0.01	0.003	0.93	0.01	0.01	0.21

42CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.42	0.27	0.92	0.013	0.004	1.01	0.03	0.04	0.2

Finish

PLAIN ZP YZP BLACK HDG DACROMET GEOMET CHROME NICKEL AND SO ON

PACKING

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

QBH SMALL PACKING

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

The advantages of QBH

QBH brand sales to the main quality assurance.
Years of export trade management, excellent service, word-of-mouth guarantee.
By working with TUV,escort for quality.
Customization of non-standard parts can be made according to customer's requirements and drawings.
For quality customers,we can provide a certain credit period.

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