Class 10.9 bolts are high-strength fasteners with higher tensile and yield performance than general purpose grades. They’re chosen where heavy loads or vibration call for stronger 10.9 steel hardware. 10.9 bolt meaning is the “10.9” property class marks a high-strength, heat-treated alloy steel with elevated tensile and yield values. Typical 10.9 bolt strength meets a minimum tensile of about 830 MPa, with proof/yield levels well above standard grades.
These fasteners use ISO metric threads and are stocked in common diameters M5–M16 across multiple lengths. A 10.9 hex bolt is usually made from quenched-and-tempered alloy steel with zinc-plated finish; select stainless variants may be supplied for special environments.
Request Quote10.9 Bolt Grade & Class 10.9 Anchor Bolts Manufacturers In India
Unifit Fastener is a manufacturer and supplier in India of HSFG bolts grade 10.9 to ASTM A324, chosen for high-stress service thanks to their high tensile and yield values. We produce grade 10.9 bolt material across many styles and sizes M20–M100 in multiple lengths. You can check the price list and specification for high tensile grade 10.9 steel bolts and grade 10.9 socket head cap screws.
Finishes include hot-dip galvanised, zinc plated, and plain for grade 10.9 nuts and matching items. Versus grade 8, a class 10.9 bolt offers higher toughness that is ideal for motorised equipment under high power and vibration. Our grade 10.9 steel bolts use chromium-based low carbon steel for added corrosion resistance, with typical properties of 940 MPa minimum yield and 1040 MPa minimum tensile. We also stock grade 10.9 stainless steel bolts in select sizes. Contact Unifit Fastener for a full price list and available types, including hex bolt class 10.9.
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Specification Chart of Grade 10.9 Bolts
Confirm grade 10.9 bolt specs like grade, size, thread, and finish before ordering. This chart aligns your selection with load, torque, and service conditions.
| Grade Name | 10.9 |
|---|---|
| grade 10.9 bolt Standards | ASTM A324, ASME SA324 |
| Hex Bolt Class 10.9 Finish | Hot dip galvanised/ Plain / Zinc plated |
| bolt 10.9 Size | Dia M 20 to 100 mm Inch 3/4“ to 3.1/2“ |
Types Of High Tensile Grade 10.9 Stud Bolts
Explore high tensile grade 10.9 stud bolts by form and head style. Pick the type that matches your installation, preload, and access needs.
Grade 10.9 Bolts
Grade 10.9 Anchor Bolts
10.9 Grade Allen Bolt
Grade 10.9 Bolt And Nut
Grade 10.9 Carriage Bolts
Grade 10.9 Cap Screw
Grade 10.9 Flange Bolts
Grade 10.9 Flat Washer
10.9 Grade Flange Nuts
Grade 10.9 Hex Bolts
Grade 10.9 M12 Bolt
Grade 10.9 Metric Nuts
Grade 10.9 Threaded Rod
Grade 10.9 Stainless Steel Bolt
Grade 10.9 Socket Head Cap Screws
Grade 10.9 Screw Dimension Chart
Use the grade 10.9 screw dimensions to verify diameter, pitch, and length. Accurate sizing ensures correct fit and reliable clamp force.
| Diameter | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | M52 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pitch | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4.5 | 4.5 | 5 | 5 |
| Across Flat (S) Max | 7 | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 |
| Across Flat (S) Minimum | 6.78 | 7.78 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.16 | 29.16 | 33 | 35 | 40 | 45 | 49 | 53.8 | 510.9 | 63.1 | 68.1 | 73.1 | 78.1 |
| Thickness (M) Max | 3.2 | 4.7 | 5.2 | 6.8 | 8.4 | 10.8 | 12.8 | 14.8 | 15.8 | 18 | 19.4 | 21.5 | 23.8 | 25.6 | 28.7 | 31 | 33.4 | 34 | 36 | 38 | 42 |
| Thickness (M) Minimum | 2.9 | 4.4 | 4.9 | 6.44 | 8.04 | 10.37 | 12.1 | 14.1 | 15.1 | 16.9 | 18.1 | 20.2 | 22.5 | 24.3 | 27.4 | 29.4 | 31.8 | 32.4 | 34.4 | 36.4 | 40.4 |
| Across corners (E) Min | 7.66 | 8.79 | 11.05 | 14.38 | 17.77 | 20.03 | 23.35 | 26.75 | 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 |
| Minor Dia at thread (min) | 3.242 | 4.134 | 4.917 | 6.647 | 8.376 | 10.106 | 11.835 | 13.835 | 15.294 | 17.294 | 19.294 | 20.752 | 23.752 | 26.211 | 29.211 | 31.67 | 34.67 | 37.129 | 40.129 | 42.587 | 46.587 |
| Minor Dia at thread (maximum) | 3.422 | 4.334 | 5.153 | 6.912 | 8.676 | 10.441 | 12.210 | 14.210 | 15.744 | 17.774 | 19.774 | 21.252 | 24.252 | 26.771 | 29.771 | 32.27 | 35.27 | 37.799 | 40.799 | 43.297 | 47.297 |
Dimensions Schedule Of Class 10.9 Hex Nuts
Match class 10.9 hex nuts to bolt size and thread for safe preload. This schedule helps you pair nuts and bolts to the same property class.
| Diameter | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | M52 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pitch | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4.5 | 4.5 | 5 | 5 |
| Across Flat (S) Max | 7 | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 |
| Minimum | 6.78 | 7.78 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.16 | 29.16 | 33 | 35 | 40 | 45 | 49 | 53.8 | 510.9 | 63.1 | 68.1 | 73.1 | 78.1 |
| Thickness (M) Max | 3.2 | 4.7 | 5.2 | 6.8 | 8.4 | 10.8 | 12.8 | 14.8 | 15.8 | 18 | 19.4 | 21.5 | 23.8 | 25.6 | 28.7 | 31 | 33.4 | 34 | 36 | 38 | 42 |
| Minimum | 2.9 | 4.4 | 4.9 | 6.44 | 8.04 | 10.37 | 12.1 | 14.1 | 15.1 | 16.9 | 18.1 | 20.2 | 22.5 | 24.3 | 27.4 | 29.4 | 31.8 | 32.4 | 34.4 | 36.4 | 40.4 |
| Across corners (E) Min | 7.66 | 8.79 | 11.05 | 14.38 | 17.77 | 20.03 | 23.35 | 26.75 | 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 |
| Minor Dia at thread (min) | 3.242 | 4.134 | 4.917 | 6.647 | 8.376 | 10.106 | 11.835 | 13.835 | 15.294 | 17.294 | 19.294 | 20.752 | 23.752 | 26.211 | 29.211 | 31.67 | 34.67 | 37.129 | 40.129 | 42.587 | 46.587 |
| Minor Dia at thread (maximum) | 3.422 | 4.334 | 5.153 | 6.912 | 8.676 | 10.441 | 12.210 | 14.210 | 15.744 | 17.774 | 19.774 | 21.252 | 24.252 | 26.771 | 29.771 | 32.27 | 35.27 | 37.799 | 40.799 | 43.297 | 47.297 |
Stainless Steel Grade 10.9 Bolt Size Chart In MM
Check the grade 10.9 stainless steel bolt size chart in mm for quick selection. Find the diameter, pitch, and length needed for your assembly.
| Thread Size d | M16 | M20 | (M22) | M24 | (M27) | M30 | M36 |
|---|---|---|---|---|---|---|---|
| p Pitch of thread | 2 | 2.5 | 2.5 | 3 | 3 | 3.5 | 4 |
| bref For length/Nom ≤100 | 31 | 36 | 38 | 41 | 44 | 49 | 56 |
| >100 | 38 | 43 | 45 | 48 | 51 | 56 | 63 |
| c Max | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |
| c Min | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
| da Max | 18.7 | 23.24 | 25.24 | 27.64 | 31.24 | 34.24 | 41.00 |
| ds Max | 16.70 | 20.84 | 22.84 | 24.84 | 27.84 | 30.84 | 37.00 |
| ds Min | 15.30 | 19.16 | 21.16 | 23.16 | 26.16 | 29.16 | 35.00 |
| dw Max | † | † | † | † | † | † | † |
| dw Min | 24.9 | 31.4 | 33.3 | 38.0 | 42.8 | 46.5 | 55.9 |
| e Min | 29.56 | 37.29 | 39.55 | 45.20 | 50.85 | 55.37 | 66.44 |
| k Nom | 10 | 12.5 | 14 | 15 | 17 | 18.7 | 22.5 |
| k Max | 10.75 | 13.40 | 14.90 | 15.90 | 17.90 | 19.75 | 23.55 |
| k Min | 9.25 | 11.60 | 13.10 | 14.10 | 16.10 | 17.65 | 21.45 |
| k′ Min | 6.5 | 8.1 | 9.2 | 9.9 | 11.3 | 12.4 | 15.0 |
| r Min | 0.6 | 0.8 | 0.8 | 1.0 | 1.2 | 1.2 | 1.5 |
| s Max | 27 | 34 | 36 | 41 | 46 | 50 | 60 |
| s Min | 26.16 | 33 | 35 | 40 | 45 | 49 | 58.8 |
| Chamfer length z Max | 3 | 3.8 | 3.8 | 4.5 | 4.5 | 5.3 | 6 |
HT Class 10.9 Studs Mechanical Strength
Review mechanical values for HT class 10.9 studs, that is, tensile, yield, and proof. These figures guide torque settings and joint design.
| Grades | Size Range | PS [MPa] | YS (min) [MPa] | TS (min) [MPa] | Hardness [Rockwell] |
|---|---|---|---|---|---|
| Class 10.9 | 5–100 | 830 | 940 | 1040 | C33–39 |
Grade 10.9 Nut Chemical Composition
Verify chemistry for the grade 10.9 nut to ensure material compatibility. Consistent composition supports strength and corrosion control.
| Carbon Steel 10.9 | C | P | S | B |
|---|---|---|---|---|
| 0.20-0.55 | 0.025 | 0.025 | 0.003 |
High Tensile ASTM A324 Grade 10.9 Bolts, Screws & Nuts Price List
See current pricing for ASTM A324 grade 10.9 bolts, screws, and nuts. Rates vary by size, coating, and quantity. You can use this list to plan orders.
| High Tensile Gr. 10.9 Fasteners Price List | Price Per Pcs |
|---|---|
| High Tensile class 10.9 Socket Head Cap Screw price | USD $3.11 |
| Grade 10.9 Allen bolt price | USD $4.15 |
| High Tensile Class 10.9 Hex head bolt price | USD $6.15 |
| High Tensile Class 10.9 Nuts price | USD $1.55 |
| High Tensile Gr 10.9 Machine bolt price | USD $5.11 |
Frequently Asked Questions About Grade 10.9 Bolt
Is 10.9 stronger than grade 8?
Yes, grade 10.9 bolts are stronger than grade 8. They have higher tensile strength (about 1040 MPa) and yield strength, suitable for heavy-duty and high-stress applications compared to grade 8 bolts.
Is grade 10.9 hardened?
Yes, grade 10.9 bolts are quenched and tempered alloy steel, making them hardened for greater strength and durability in demanding environments.
What is a 10.9 bolt used for?
Grade 10.9 bolts are used in automotive, heavy machinery, structural steelwork, and applications requiring high strength, shock resistance, and long-lasting joint integrity.
Do grade 10.9 bolts rust?
Grade 10.9 bolts are carbon steel and can rust without coatings. Galvanized or zinc-plated finishes protect them from corrosion in outdoor or harsh environments.
What is the torque spec for a 10.9 bolt?
Torque specs vary by size; for example, M16 grade 10.9 bolts typically require about 335 Nm torque, while M20 needs around 650 Nm for proper tightening. Always refer to manufacturer specs.