Complaint
b - length of the thread (at least)
l - length of bolt
k - head height
e - the diameter of the circumscribed circle (not less than)
s - size hex head turnkey
Drywall Screw ( Please Click the Following Picture)
Self Drilling Screw ( Please Click the Following Picture)
Roofing Hanger Bolt Screw ( Please Click the Following Picture)
Makings:QBH
Steel: steel
Stainless: A2, A4
Plastic: -
Non Ferrous: -
Thread: as DIN 7998
Table according to DIN 571:
| Thread | 4 | 5 | 6 | -7 | 8 | 10 | 12 | 16 | 20 | ||
| ds | nominal size max. | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 16 | 20 | |
| min. | 3,52 | 4,52 | 5,52 | 6,42 | 7,42 | 9,42 | 11,3 | 15,3 | 19,3 | ||
| da | max. | 5 | 6 | 7,2 | 8,2 | 10,2 | 12,2 | 15,2 | 19,2 | 24,4 | |
| k | nominal size | 2,8 | 3,5 | 4 | 5 | 5,5 | 7 | 8 | 10 | 13 | |
| max. | 3,1 | 3,88 | 4,38 | 5,38 | 5,88 | 7,45 | 8,45 | 10,45 | 13,9 | ||
| min. | 2,5 | 3,13 | 3,63 | 4,63 | 5,13 | 6,55 | 7,55 | 9,55 | 12,1 | ||
| s | nominal size | 7 | 8 | 10 | 12 | 13 | 17 | 19 | 24 | 30 | |
| max. | 7 | 8 | 10 | 12 | 13 | 17 | 19 | 24 | 30 | ||
| min. | 6,64 | 7,64 | 9,64 | 11,57 | 12,57 | 16,57 | 18,48 | 23,16 | 29,16 | ||
| e | min. | 7,5 | 8,63 | 10,89 | 13,07 | 14,2 | 18,72 | 20,88 | 26,17 | 32,95 | |
| l | weight kg/1000pcs | ||||||||||
| nominal size | min. | max. | |||||||||
| 16 | 15,1 | 16,9 | 1,71 | 292 | |||||||
| 20 | 18,95 | 21,05 | 2,01 | 3,42 | 5,02 | ||||||
| 25 | 23,95 | 26,05 | 2,41 | 4,02 | 5,82 | 11,5 | |||||
| 30 | 28,95 | 31,05 | 2,81 | 4,62 | 6,62 | 12,9 | 23,6 | ||||
| 35 | 33,75 | 36,25 | 3,11 | 5,12 | 7,42 | 14,2 | 25,8 | 36,2 | |||
| 40 | 38,75 | 41,25 | 3,51 | 5,82 | 8,22 | 15,6 | 28 | 39,2 | |||
| 45 | 43,75 | 46,25 | 8,94 | 16,9 | 30 | 42,1 | |||||
| 50 | 48,75 | 51,25 | 9,64 | 18,2 | 32,1 | 45,4 | 84,1 | ||||
| 55 | 53,5 | 56,5 | 10,5 | 19,6 | 34,3 | 48,6 | 89,7 | ||||
| 60 | 58,5 | 61,5 | 11,2 | 20,9 | 36,5 | 51,8 | 94,9 | 165 | |||
| 65 | 63,5 | 66,5 | 22,2 | 38,5 | 54,7 | 99,5 | 174 | ||||
| 70 | 68,5 | 71,5 | 23,6 | 40,7 | 57,8 | 107 | 182 | ||||
| 75 | 73,5 | 76,5 | 25 | 42,9 | 61 | 112 | 192 | ||||
| 80 | 78,5 | 81,5 | 26,5 | 45,2 | 64,5 | 118 | 201 | ||||
| 90 | 88,25 | 91,75 | 29,4 | 49,9 | 71 | 130 | 220 | ||||
| 100 | 98,25 | 101,75 | 32 | 54 | 77,1 | 141 | 238 | ||||
| 110 | 108,25 | 111,75 | 83,4 | 152 | 253 | ||||||
| 120 | 118,25 | 121,75 | 89,5 | 163 | 275 | ||||||
| 130 | 128 | 132 | 175 | 293 | |||||||
| 140 | 138 | 142 | 187 | 317 | |||||||
| 150 | 148 | 152 | 198 | 328 | |||||||
| 160 | 158 | 162 | 209 | 348 | |||||||
| 170 | 168 | 172 | 366 | ||||||||
| 180 | 178 | 182 | 385 | ||||||||
| 190 | 187,7 | 192,3 | 404 | ||||||||
| 200 | 197,7 | 202,3 | 421 | ||||||||
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 | ||||
| D≤16mma | d>16mmb | d≤16mm | ||||||||||
| 1 | Tensile strength Rm,Mpa | nom.c | 400 | 500 | 600 | 800 | 900 | 1000 | 1200 | |||
| max. | 400 | 420 | 500 | 520 | 600 | 800 | 830 | 900 | 1040 | 1220 | ||
| 2 | Lower yield strength ReL,Mpa | nom.c | 240 | -- | 300 | -- | -- | -- | -- | -- | -- | -- |
| max. | 240 | -- | 300 | -- | -- | -- | -- | -- | -- | -- | ||
| 3 | Stress at 0,2 % nonproportional elongation Rp0.2,Mpa | nom.c | -- | -- | -- | -- | -- | 640 | 640 | 720 | 900 | 1080 |
| max. | -- | -- | -- | -- | -- | 640 | 660 | 720 | 940 | 1100 | ||
| 4 | Stress at 0,0048 d non-proportional elongation for full-size fasteners Rpf,Mpa | nom.c | -- | 320 | -- | 400 | 480 | -- | -- | -- | -- | -- |
| max. | -- | 340e | -- | 420e | 480e | -- | -- | -- | -- | -- | ||
| 5 | Stress under proof load Spf,Mpa | nom. | 225 | 310 | 280 | 380 | 440 | 580 | 600 | 650 | 830 | 970 |
| Proof Sp,nom/ReL min Or strength Sp,nom/Rp0.2min Or rati Sp,nom/Rpf 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,Af | 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 |
| max. | 220g | 250 | 320 | 335 | 360 | 380 | 435 | |||||
| 11 | Brinell hardness, HBW ,F=30D² | min. | 114 | 124 | 147 | 152 | 181 | 238 | 242 | 276 | 304 | 366 |
| max. | 209g | 238 | 304 | 318 | 342 | 361 | 414 | |||||
| 12 | Rockwell hardness,HRB , HRB | min. | 67 | 71 | 79 | 82 | 89 | |||||
| max. | 95g | 99.5 | ||||||||||
| Rockwell hardness, HRC | min. | -- | 22 | 23 | 28 | 32 | 39 | |||||
| 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 | ||||||
| Depth of complete decarburization in the thread,G,mm | max. | -- | 0.015 | |||||||||
| 15 | Reduction of hardness after retempering,HV | max. | -- | 20 | ||||||||
| 16 | Breaking torque, MB,N·m | min. | -- | in accordance with ISO 898-7 | ||||||||
| 17 | Impact strength, KVK,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
Free Samples for Standard Fastener from Jiaxing City Qunbang Hardware
We Promise:
1.High quality
2. Competitive price
3. The shortest delivery
4. The fastest response
5. The best service
FAQ
1.What's your experience like?
Our general manager has been engaged in the export of fasteners since 2005.
Our team can provide you with professional fasteners selling and smooth export services.
2.How about your price?
High quality products with reasonable price. Please give me a inquire, We will quoted you a price for you refer at once.
3. How do you control your quality?
We require the quality control department to inspect every production link of each shipment. And we can provide you MTC and mill certificate when the goods is finished.
4.How about your delivery time?
General speaking, if the goods is in stock, we can delivery them with 2-5days, If the quantity is 1-2container, we can give you with 18-25days,if the quantity is more than 2 container and you are very urgent, we can let factory priority produce your goods.
5.What is your packing?
Our packing is 20-25kg for one carton,36 or 48pcs cartons for one pallet. One pallets is about 900-960kg, We also can make customer's logo on the cartons. Or we customized cartons according to customers' requirement.
6.What is your payment term?
We can accept T/T,LC for general order ,Paypal and Western union for small order or samples order.
Awaiting for your kind inquiry! Thanks & best regards!
For more information: http://qbfastener.en.made-in-china.com
