Hex Head Bolts (Full Thread)
| Standard | DIN 933 · ISO 4017 · SAE J429 |
|---|---|
| Material | 10B21 / 40Cr / SCM435 / 4140 |
| Strength Grade | 8.8 / 10.9 / 12.9 |
| Size Range | M5-M24 |
| Surface Treatment | Zinc Plated / Zinc Flake / Geomet / Black Oxide |
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Product Description
Product Description & Key Specifications
Full-thread hex head bolts provide continuous thread along the shank, making them useful where clamped thickness varies, where adjustment is needed, or where thread engagement must be available across most of the bolt length. This range covers ISO 4017, DIN 933 and SAE J429 references in 10B21, 40Cr, SCM435 and 4140.
Grades 8.8, 10.9 and 12.9 are selected according to clamp load, joint strength and project specification. Full-thread bolts are common in automotive brackets, construction hardware, railway accessories, renewable energy supports, machinery frames and maintenance kits. They should be paired with compatible nuts and washers by grade and coating.
Zinc plated finish is used for general assemblies, zinc flake and Geomet provide improved corrosion performance with controlled thickness, and black oxide is common for machinery or controlled indoor environments. Common RFQs include M6, M8, M10, M12, M16, M20 and M24 bolts.
| Product type | Hex head bolts, full thread |
|---|---|
| Standards | ISO 4017 / DIN 933 / SAE J429 |
| Material | 10B21 / 40Cr / SCM435 / 4140 |
| Strength grade | 8.8 / 10.9 / 12.9 |
| Size range | M5-M24 |
| Common models | M6 x 20, M8 x 25, M10 x 30, M12 x 40, M16 x 50, M20 x 80, M24 x 100 |
| Thread type | Metric coarse thread, full thread |
| Surface finish | Zinc plated / Zinc flake / Geomet / Black oxide |
| Matched hardware | Hex nuts, structural nuts, flat washers, spring washers and wedge lock washers where specified |
| Documentation | MTC, CoC, hardness, tensile, dimensional and coating report on request |
Dimensions & SpecificationsDIN 933 / ISO 4017
Technical Drawing
Dimensional Table
| Parameter | M1.6 | M1.7 | M2 | M2.3 | M2.5 | M2.6 | M3 | M3.5 | M4 | M5 | M6 | M7 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | 0.35 | 0.35 | 0.4 | 0.45 | 0.45 | 0.45 | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 |
| da/max | 2 | 2.1 | 2.6 | 2.9 | 3.1 | 3.2 | 3.6 | 4.1 | 4.7 | 5.7 | 6.8 | 7.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | 20.2 | 22.4 | 24.4 | 26.4 |
| e/min | 3.41 | 3.82 | 4.32 | 4.95 | 5.45 | 5.51 | 6.01 | 6.58 | 7.66 | 8.79 | 11.05 | 12.12 | 14.38 | 18.9 | 21.1 | 24.49 | 26.75 | 30.14 | 33.53 | 35.72 | 39.98 |
| k/min | 0.98 | 1.33 | 1.28 | 1.73 | 1.58 | 1.93 | 1.88 | 2.28 | 2.68 | 3.35 | 3.85 | 4.65 | 5.15 | 6.22 | 7.32 | 8.62 | 9.82 | 11.28 | 12.28 | 13.78 | 14.78 |
| k/max | 1.22 | 1.08 | 1.52 | 1.48 | 1.82 | 1.68 | 2.12 | 2.52 | 2.92 | 3.65 | 4.15 | 4.95 | 5.45 | 6.56 | 7.68 | 8.98 | 10.18 | 11.72 | 12.72 | 14.22 | 15.22 |
| r/min | 0.1 | 0.1 | 0.1 | 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 | 0.6 | 0.8 | 0.8 | 0.8 |
| s/max | 3.2 | 3.5 | 4 | 4.5 | 5 | 5 | 5.5 | 6 | 7 | 8 | 10 | 11 | 13 | 17 | 19 | 22 | 24 | 27 | 30 | 32 | 36 |
| s/min | 3.02 | 3.32 | 3.82 | 4.32 | 4.82 | 4.82 | 5.32 | 5.82 | 6.78 | 7.78 | 9.78 | 10.73 | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 | 26.67 | 29.67 | 31.61 | 35.38 |
Engineering references
Technical resources
Review the applicable dimensions, drawing and standard relationship before confirming the ordered specification.02
Selection
Selection Advantages by Application
Automotive and EV Brackets
M6-M12 full-thread hex bolts are used in brackets, accessory mounts and equipment supports where flexible thread engagement is useful.
Automotive and EV fastenersConstruction and General Steelwork
M12-M24 8.8 / 10.9 bolts support construction hardware, supports and field-installed assemblies with zinc plated or zinc flake finishes.
Construction fastenersRailway and Renewable Energy Accessories
Geomet or zinc flake full-thread bolts can be specified for rail accessories and renewable energy support hardware where corrosion performance matters.
Renewable energy fasteners03
Assembly
Recommended Matching Products
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Manufacturing
Manufacturing & Quality Control
Manufacturing CapabilityQuality Control
Cold heading or hot forming depending on size and gradeMaterial and heat number verification for alloy steel route
Full-length thread rolling and heat treatmentThread gauge, hardness and tensile inspection by lot
Hex head geometry to ISO / DIN / SAE referenceHead dimensions, length and thread length verification
Zinc plated, zinc flake, Geomet or black oxide finishCoating thickness, adhesion and visual inspection
Bolt supply alone or as bolt-nut-washer setsCoC, MTC and inspection report prepared on request
See how heated alloy-steel blanks are die forged and learn which dimensions, inspections and downstream processes must be confirmed for a finished bolt.
Watch the hot forging video and read the technical guide →05
FAQ
Common Questions Before RFQ
When should I use full-thread hex bolts?
Use them when the joint needs thread engagement across most of the bolt length or when clamped thickness varies.
What is the difference between DIN 933 and DIN 931?
DIN 933 is full thread, while DIN 931 is partial thread with an unthreaded shank.
Which coating is best?
Zinc plated is common for general use; zinc flake and Geomet provide higher corrosion performance; black oxide is used for selected machinery assemblies.
Can grade 12.9 be supplied?
Yes. Grade 12.9 can be supplied when material, heat treatment and coating rules are confirmed.
Can matching nuts and washers be supplied?
Yes. Full-thread hex bolts can be supplied with compatible nuts and washers as kits.
Need full-thread hex head bolts?
Send standard, size, length, grade, material, coating, quantity and matching nut/washer needs. We can quote ISO 4017 / DIN 933 full-thread bolts in 8.8, 10.9 and 12.9 grades.
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