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Grade 8.8 Bolts belong to the DIN 933 grade 8.8 standard. This is a structural grade for bolts. This is a medium carbon steel bolt specification. These bolts are heat treated by quenched and tempered methods. Navstar Steel is a leading manufacturer and supplier of the Grade 8.8 Bolts in different types.
These are suitable for low tensile strength applications as the medium carbon material has low tensile strength. But the medium carbon content makes the Class 8.8 Nuts to have high ductility and workability. The High Tensile Class 8.8 Studs are metallic rods with threads on both ends. The threads on the studs are male and they connect to the equally sized female threaded components on both ends of the stud.
The BS 3692 Grade 8.8 Hex Bolt and others in the 8.8 grade come with different lengths ranging from 20mm to 100mm and different finishes. There could be zinc plated, hot dip galvanized or plain types of bolts. The M20 Grade 8.8 Galvanised Bolts are dipped into the galvanizing solution and get a galvanized coating. The products are used in a variety of industrial applications ranging from domestic, commercial to industrial applications. The ASME SA324 8.8 Stainless Steel Bolts are cost effective, long lasting and ductile bolts. They are suitable for low strength applications with low corrosion risks. Please contact us for more information on the products and pricing.
AStm Standards | DIN ISO EN 4017 & 4014 DIN 933 / 931 & IS 1363 / 1363 |
Size | Diameter 20 to 100 Milimeter / Inch 3/4 to 3.1/2 |
Surface Finish | Zinc plated / Plain / Hot dip galvanised |
CLASS | MATERIAL AND TREATMENT | C | C | P | S | B | TEMPERING TEMP. [C] |
---|---|---|---|---|---|---|---|
MIN | MAX | MAX | MAX | MAX | |||
8.8 | CARBON STEEL WITH ADDITIVES (E.G. B, MN OR CR) QUENCHED AND TEMPERED | 0.15 (D) | 0.4 | 0.025 | 0.025 | 0.003 | 425 |
CARBON STEEL QUENCHED AND TEMPERED | 0.25 | 0.55 | 0.035 | 0.025 |
Grades | Size Range | PS [MPa] | YS (min) [MPa] | TS (min) [MPa] | Hardness [Rockwell] |
---|---|---|---|---|---|
Class 8.8 | Under M16 | 580 | 640 | 800 | |
17-72 | 600 | 660 | 830 | C23–34 |
class 8.8 Eye Bolt, Size: M3 to M39
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Class and Material | Nominal Size Range (mm) | Mechanical Properties | ||
---|---|---|---|---|
Proof Load (MPa) | Min. Yield Strength (MPa) | Min. Tensile Strength (MPa) | ||
Class 8.8 Medium carbon steel, quenched and tempered | All sizes below 16mm | 580 |
640 |
800 |
16mm - 72mm | 600 | 660 | 830 |
Bolt Dia | Body Dia | Head Dia(F) | Head Height (H) | Degree of Slope | |||
---|---|---|---|---|---|---|---|
(D) | Max | Max Edge Sharp | Min Edge Sharp | Absolute Min Rounded | Max | Min | |
1/2 | 0.515 | 0.935 | 0.905 | 0.845 | 0.269 | 0.233 | 78° to 82° |
5/8 | 0.642 | 1.169 | 1.132 | 1.066 | 0.336 | 0.292 | 78° to 82° |
3/4 | 0.768 | 1.402 | 1.357 | 1.285 | 0.403 | 0.349 | 78° to 82° |
7/8 | 0.895 | 1.637 | 1.584 | 1.511 | 0.47 | 0.408 | 78° to 82° |
1 | 1.022 | 1.869 | 1.81 | 1.735 | 0.537 | 0.466 | 78° to 82° |
1-1/8 | 1.149 | 2.104 | 2.037 | 1.962 | 0.604 | 0.525 | 78° to 82° |
1-1/4 | 1.277 | 2.337 | 2.262 | 2.187 | 0.671 | 0.582 | 78° to 82° |
1-3/8 | 1.404 | 2.571 | 2.489 | 2.414 | 0.738 | 0.641 | 78° to 82° |
1-1/2 | 1.531 | 2.804 | 2.715 | 2.64 | 0.805 | 0.698 | 78° to 82° |
Dimensions per ASME B18.5 1990 (R 1998) |
Diameter Chart | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | M52 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pitch List | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 |
2 |
2.5 |
3 |
3.5 |
4 |
4.5 |
5 |
||||||||
GR A Length | 40 | 50 | 60 | 80 | 100 | 120 | 140 |
150 |
Grade A not applicable to these dia’s | ||||||||||||
Head Across Flat (S) Nom = Max Min GR A GR B | 7 | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 |
6.78 | 7.78 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.67 | 29.67 | 33.38 | 35.38 |
GR A not applicable to these diameters | |||||||||
6.64 | 7.64 | 9.64 | 12.57 | 15.57 | 17.57 | 20.16 | 23.16 | 26.16 | 29.16 | 33 | 35 | 40 | 45 | 49 | 53.8 | 58.8 | 63.1 | 68.1 | 73.1 | 78.1 | |
Head Height Nom Tol + or – GR A GR B | 2.8 | 3.5 | 4 | 5.3 | 6.4 | 7.5 | 8.8 | 10 | 11.5 | 12.5 | 14 | 15 | 17 | 18.7 | 21 | 22.5 | 25 | 26 | 28 | 30 | 33 |
0.125 |
0.15 |
0.18 |
0.215 |
GR A not applicable to these diameters | |||||||||||||||||
0.2 |
0.24 |
0.29 |
0.35 |
0.42 |
0.5 | ||||||||||||||||
Across corners e Min GR A GR B | 7.66 | 8.79 | 11.05 | 14.38 | 17.77 | 20.03 | 23.36 | 26.75 | 30.14 | 33.53 | 37.72 | 39.98 |
GR A not applicable to these diameters | ||||||||
7.5 | 8.63 | 10.89 | 14.2 | 17.59 | 19.85 | 22.78 | 26.17 | 29.56 | 32.95 | 37.29 | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | 71.3 | 76.95 | 82.6 | 88.25 | |
Thread Length (b) For lengths < or = 125ilimeter For lengths > 12ilimeter <= 200milimeter For lengths > 200ilimeter | 14 | 16 | 18 | 22 | 26 | 30 | 34 | 38 | 42 | 46 | 50 | 54 | 60 | 66 |
Not specified as full thread recommended | ||||||
20 | 22 | 24 | 28 | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | 66 | 72 | 78 | 84 | 90 | 96 | 102 | 108 | 116 | |
33 | 35 | 37 | 41 | 45 | 49 | 53 | 57 | 61 | 65 | 69 | 73 | 79 | 85 | 91 | 97 | 103 | 109 | 115 | 121 | 129 | |
Major Diameter at thread (minimum) | 3.838 | 4.826 | 5.794 | 7.76 | 9.732 | 11.701 | 13.682 | 15.682 | 17.623 | 19.623 | 21.623 | 23.577 | 26.577 | 29.522 | 32.522 | 35.465 | 38.465 | 41.437 | 44.437 | 47.399 | 51.399 |
Major Dia at thread (maximum) | 3.978 | 4.976 | 5.974 | 7.972 | 9.968 | 11.966 | 13.962 | 15.962 | 17.958 |
Grade 8.8 Fasteners Price List | Price Per Pcs. |
---|---|
Grade 8.8 Machine bolts price | USD $5.10 |
Grade 8.8 Hex head bolts price | USD $6.05 |
High Tensile Grade 8.8 Socket Head Cap Screw price | USD $3.10 |
Grade 8.8 Screws price | USD $3.70 |
Grade 8.8 Dowel Pins price | USD $1.20 |
Grade 8.8 Allen bolts price | USD $4.25 |
Grade 8.8 Washer price | USD $1.00 |
Grade 8.8 Nuts price | USD $1.45 |
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