Specification
DIN 933 Hex Head Cap Screws
DIN 933 Hex Head Cap Screws are fully threaded, have external coarse machine screw threads
and, like other hex head screws, are used with both tapped holes
and nuts. Their dimensions are similar to ISO 4017 and are
available in Class 8.8, 10.9 and 12.9 steel and Class 70 (A2-70,
A4-70) stainless steel; less common stainless steel sizes may be
Class 50. Zinc plating protects against corrosion while plain
finish is unplated and can rust. A2 stainless steel is considered
the same as 18-8 and A4 is essentially 316. Class 8.8 and 10.9
thread tolerance for plain finish is 6g and 6h for plated;
stainless steel is 6g; right-hand threads are standard. Also known
as hex head bolts and tap bolts, all lengths are fully threaded.
Length is measured from under the head to the tip. DIN 933 Hex Head
Cap Screws are similar to ISO 4017, JIS B1180 and ANSI B18.2.3.1M.
In contrast, DIN 931 is partially threaded and DIN 961 has fine
threads. (Note: Thread pitch, the distance between threads, is traditionally
omitted for fasteners with coarse threads but is included here for
reference.)
DIN 933 - Hexagon head bolts with thread up to head
Current norm: DIN EN 24017
Equivalent norms: ISO 4017; CSN 021103; PN 82105; UNI 5739; EU 24017
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 933
Screw Thread
d | |
| P | Pitch | | a | max | | c | min | | max | | da | max | | dw | 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 |
| | 0.35 | 0.4 | 0.45 | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | | 1.05 | 1.2 | 1.35 | 1.5 | 1.8 | 2.1 | 2.4 | 3 | 3 | 3.75 | 4.5 | 5.25 | 6 | 6 | | 0.1 | 0.1 | 0.1 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.2 | | 0.25 | 0.25 | 0.25 | 0.4 | 0.4 | 0.4 | 0.5 | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | | 2 | 2.6 | 3.1 | 3.6 | 4.1 | 4.7 | 5.7 | 6.8 | 7.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | | 2.4 | 3.2 | 4.1 | 4.6 | 5.1 | 5.9 | 6.9 | 8.9 | 9.6 | 11.6 | 15.6 | 17.4 | 20.5 | 22.5 | | - | - | - | - | - | 5.7 | 6.7 | 8.7 | 9.4 | 11.4 | 15.4 | 17.2 | 20.1 | 22 | | 3.41 | 4.32 | 5.45 | 6.01 | 6.58 | 7.66 | 8.79 | 11.05 | 12.12 | 14.38 | 18.9 | 21.1 | 24.49 | 26.75 | | - | - | - | - | - | 7.5 | 8.63 | 10.89 | 11.94 | 14.2 | 18.72 | 20.88 | 23.91 | 26.17 | | 1.1 | 1.4 | 1.7 | 2 | 2.4 | 2.8 | 3.5 | 4 | 4.8 | 5.3 | 6.4 | 7.5 | 8.8 | 10 | | 0.98 | 1.28 | 1.58 | 1.88 | 2.28 | 2.68 | 3.35 | 3.85 | 4.65 | 5.15 | 6.22 | 7.32 | 8.62 | 9.82 | | 1.22 | 1.52 | 1.82 | 2.12 | 2.52 | 2.92 | 3.65 | 4.15 | 4.95 | 5.45 | 6.56 | 7.68 | 8.98 | 10.18 | | - | - | - | - | - | 2.6 | 3.26 | 3.76 | 4.56 | 5.06 | 6.11 | 7.21 | 8.51 | 9.71 | | - | - | - | - | - | 3 | 3.74 | 4.24 | 5.04 | 5.54 | 6.69 | 7.79 | 9.09 | 10.29 | | 0.7 | 0.9 | 1.1 | 1.3 | 1.6 | 1.9 | 2.28 | 2.63 | 3.19 | 3.54 | 4.28 | 5.05 | 5.96 | 6.8 | | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | | 3.2 | 4 | 5 | 5.5 | 6 | 7 | 8 | 10 | 11 | 13 | 17 | 19 | 22 | 24 | | 3.02 | 3.82 | 4.82 | 5.32 | 5.82 | 6.78 | 7.78 | 9.78 | 10.73 | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 | | - | - | - | - | - | 6.64 | 7.64 | 9.64 | 10.57 | 12.57 | 16.57 | 18.48 | 21.16 | 23.16 |
|
Screw Thread
d | |
| P | Pitch | | a | max | | c | min | | max | | da | max | | dw | 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 |
| | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4.5 | 4.5 | 5 | 5 | | 7.5 | 7.5 | 7.5 | 9 | 9 | 10.5 | 10.5 | 12 | 12 | 13.5 | 13.5 | 15 | 15 | | 0.2 | 0.2 | 0.2 | 0.2 | 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 | 0.8 | 0.8 | 0.8 | 0.8 | 1 | 1 | 1 | 1 | 1 | | 20.2 | 22.4 | 24.4 | 26.4 | 30.4 | 33.4 | 36.4 | 39.4 | 42.4 | 45.6 | 48.6 | 52.6 | 56.6 | | 25.3 | 28.2 | 30 | 33.6 | - | - | - | - | - | - | - | - | - | | 24.8 | 27.7 | 29.5 | 33.2 | 38 | 42.7 | 46.5 | 51.1 | 55.9 | 59.9 | 64.7 | 69.4 | 74.2 | | 30.14 | 33.53 | 35.72 | 39.98 | - | - | - | - | - | - | - | - | - | | 29.56 | 32.95 | 35.03 | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | 71.3 | 76.95 | 82.6 | 88.25 | | 11.5 | 12.5 | 14 | 15 | 17 | 18.7 | 21 | 22.5 | 25 | 26 | 28 | 30 | 33 | | 11.28 | 12.28 | 13.78 | 14.78 | - | - | - | - | - | - | - | - | - | | 11.72 | 12.72 | 14.22 | 15.22 | - | - | - | - | - | - | - | - | - | | 11.15 | 12.15 | 13.65 | 14.65 | 16.65 | 18.28 | 20.58 | 22.08 | 24.58 | 25.58 | 27.58 | 29.58 | 32.5 | | 11.85 | 12.85 | 14.35 | 15.35 | 17.35 | 19.12 | 21.42 | 22.92 | 25.42 | 26.42 | 28.42 | 30.42 | 33.5 | | 7.8 | 8.5 | 9.6 | 10.3 | 11.7 | 12.8 | 14.4 | 15.5 | 17.2 | 17.9 | 19.3 | 20.9 | 22.8 | | 0.6 | 0.8 | 0.8 | 0.8 | 1 | 1 | 1 | 1 | 1 | 1.2 | 1.2 | 1.6 | 1.6 | | 27 | 30 | 32 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | | 26.67 | 29.67 | 31.61 | 35.38 | - | - | - | - | - | - | - | - | - | | 26.15 | 29.16 | 31 | 35 | 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 |
| 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
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.
Product application
The DIN 933are a hexagon shaped screws, manufactured from steel.
Grade 10.9 metric bolts are produced using DIN 933 bolt material
such as, either medium carbon steel, medium carbon steel alloy or
low carbon boron steel. In order to qualify as a grade DIN 933 bolt
10.9 metric bolts, the allot has to be processed by both quenching
as well as tempering. Usually, the DIN 933 bolt 10.9 is used in applications for bolting large and forged parts, and
the automotive industry as well.
