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All new products

Round Head Screw with Square Neck

Basic Info.Model NO.Carriage BoltStandardDIN, ANSI, GB, JIS, BSWMaterialStainless SteelConnectionFemaleSurface TreatmentWithout TreatmentHead TypeRoundTrademarkQBHTransport Package25kg/CartonSpecificationCustomizedOriginChinaHS Code73261990Product Description Products nameRound Head Square Neck Carr......Keywords:Round Head Screw with Square Neck, Solar Carriage Bolt, PV Carriage Bolt

Product Description

Basic Info.

Model NO.

Carriage Bolt

Standard

DIN, ANSI, GB, JIS, BSW

Material

Stainless Steel

Connection

Female

Surface Treatment

Without Treatment

Head Type

Round

Trademark

QBH

Transport Package

25kg/Carton

Specification

Customized

Origin

China

HS Code

73261990

Product Description

Products name	Round Head Square Neck Carriage Bolt DIN603 Carbon Steel WZP
Standard:	DIN,ASTM/ANSI JIS EN ISO,AS,GB
Model No.	QBH-C-DIN603-ZP, QBH-C-DIN603-HDG
Supplier	QBH
Material	Stainless Steel: SS201, SS303, SS304, SS316,SS316L,SS904L,F593
	Steel Grade: DIN: Gr.4.6,4.8,5.6,5.8,8.8,10.9,12.9; SAE: Gr.2,5,8; ASTM: 307A,307B,A325,A394,A490,A449,
Finishing	Zinc(Yellow,White,Blue,Black),Hop Dip Galvanized(HDG),Black Oxide, Geomet,Dacroment,anodization,Nickel plated,Zinc-Nickel plated

Production Process	M2-M24:Cold Froging,M24-M100 Hot Forging, Machining and CNC for Customized fastener
Customized Products Lead time	Busy season:15-30days,Slack seaon:10-15days
Stock Products	Steel:4.8Grade DIN6923,8.8Grade 10.9Grade of GB5783 and GB5782 Stainless steel: All DIN Standard stainless steel Bolt
Free Samples for standard fastener

Legend:

b - length of the thread (at least)
l - length of bolt
d - the nominal diameter of the thread
k - head height
ds - diameter of the screw shank
dk - head diameter
f - height squared
v - width of the square
r1 - Head radius
lg - length of the shank to thread
ls - length of the shank to the start of the thread

Makings:

Steel: 4.8,5.8,8.8
Stainless: A2, A4
Thread: 6g

Notes:

Table according to DIN 603:

dimensions in mm

Thread d		M5	M6	M8	M10	M12	M16	M20
Product Name		DIN 603 Square Neck Round Head Carriage Bolt
Supplier		QBH
P		0,8	1	1,25	1,5	1,75	2	2,5
b	l < 125mm	16	18	22	26	30	38	46
	125 < l < 200mm	22	24	28	32	36	44	52
	l > 200mm	-	-	41	45	49	57	65
dk	max.	13,55	16,55	20,65	24,65	30,65	38,8	46,8
dk	min.	12,45	15,45	19,35	23,35	29,35	37,2	45,2
ds	max.	5	6	8	10	12	16	20
ds	min.	4,52	5,52	7,42	9,42	11,3	15,3	19,16
f	max.	4,1	4,6	5,6	6,6	8,75	12,9	15,9
f	min.	2,9	3,4	4,4	5,4	7,25	11,1	14,1
k	max.	3,3	3,88	4,88	5,38	6,95	8,95	11,05
k	min.	2,7	3,12	4,12	4,62	6,05	8,05	9,95
r1	approx.	10,7	12,6	16	19,2	24,1	29,3	33,9
r2	max.	0,5	0,5	0,5	0,5	1	1	1
r3	max.	0,75	0,9	1,2	1,5	1,8	2,4	3
v	max.	5,48	6,48	8,58	10,58	12,7	16,7	20,84
v	min.	4,52	5,52	7,42	9,42	11,3	15,3	19,16

Dimensions

Nom. Dia. (d)		M6	M8	M10	M12	M16	M20
Product Name		DIN 603 Square Neck Round Head Carriage Bolt
Supplier		QBH
Thread Pitch		1	1.25	1.5	1.75	2	2.5
Thread Length (b)	L < 125mm	18	22	26	30	38	46
	125-200mm	24	28	32	36	44	52
	L > 200mm	-	41	45	49	57	65
dk	Max.	16.55	20.65	24.65	30.65	38.8	46.8
f	Max.	4.6	5.6	6.6	8.75	12.9	15.9
k	Max.	3.88	4.88	5.38	6.95	8.95	11.05
v	Max.	6.48	8.58	10.58	12.7	16.7	20.84
L		WEIGHT IN KG/1000 PCS
16		6.90
20		7.60	13.80	22.70
25		8.50	15.40	25.20
30		9.60	17.00	27.70	45.70
35		10.70	19.00	30.20	49.40
40		11.80	21.00	32.70	53.10
45		12.90	23.00	35.80	56.80
50		14.00	25.00	38.90	61.20	119.00
55		15.10	26.90	42.00	65.60	126.00
60		16.20	28.90	45.10	70.00	133.00
65		17.30	30.90	48.20	74.40	141.00
70		18.40	32.90	51.30	78.80	149.00	247.00
80		20.60	36.80	57.50	87.00	165.00	272.00
90		22.80	40.80	63.70	96.00	181.00	297.00
100		25.00	44.80	69.90	105.00	197.00	322.00
110		27.20	48.80	76.10	114.00	213.00	347.00
120		29.40	52.80	82.30	123.00	229.00	372.00
130		31.60	56.80	88.50	132.00	245.00	397.00
140		32.80	60.80	95.00	141.00	261.00	422.00
150		35.00	64.80	101.00	150.00	277.00	447.00
160				107.00	159.00	293.00	497.00
180				119.00	177.00	325.00	547.00
200				131.00	195.00	357.00	597.00

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
Supplier			QBH
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
Supplier			QBH
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.

QBH 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

QBH 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

QBH 10B21

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

QBH 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

QBH 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

QBH 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

QBH 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

Product Tag

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whl

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