HSFG Bolts / ASTM Bolts
We manufacture quality fastener products without compromise.
HSFG stands for High Strength Friction Grip and as the name suggests they make use of friction. Where a traditional bolt will stop the plates in a connection from moving apart by supporting the weight on the bolt shank in the form of shear stress, an HSFG supports the weight by clamping the plates so tightly together that they can’t slip past each other.
In other words, the friction generated between the plates is equal to the force being put on the plate by the weight of the beam it supports.
To make sure that the plates don’t slip past each other, the bolt needs to be carefully preloaded. The area around the bolt needs to be clean and unpainted (which we make sure of whenever we use HSFG bolts), and the bolt then needs to be tightened to a precise level.
In general, we include a DTI (Direct Tension Indicator) with the HSFG bolts that lets you know when the right tensions been reached. (The little bumps on the DTI will be compressed as the tension increases).
Our HSFG Bolts are designed in such a way that they have a high rate of dimensional accuracy. Our precision and eye for detail make the HSFG Bolts have a robust design which matches the needs that the industry demands. Our HSFG Bolts have high abrasion resistance and corrosion resistance which make them have a longer functional life. They have a high tensile strength which makes them an industry leader in its class.
M6 to M64
Up to 400MM
8.8S, 10.9S
- Self Finish
- Electro Zinc Plated
- Yellow Finish
- Auto Black Finish
- Hot Dip Galvanized (HDG)
- Rilsan Blue, Etc.
IS 3757
| Specifications | Grade | Thread | Diameter | Length |
|---|---|---|---|---|
| DIN 6914 | GR - 8.8/10.9 | METRIC 6G/8G | M12-M36 | 600MM |
| BS 4395-I & II ISO 7412 | GR - 8.8/10.9 | METRIC 6G/8G | M12-M36 | 600MM |
| ANSI B.18.2.3.7 | GR - ASTM A325M, ASTM A490M | UNC/UNF-2A M/UNC | 1/2"-1.1/2" | Upto 12" |
| EN-14399-3/4 | GR - 8.8/10.9 | UNC/UNF-2A M/UNC | 1/2"-1.1/2" | Upto 12" |
| ASTM A325M | GR - 8.8/10.9 | METRIC 6G/8G | M12-M36 | 600MM |
| ASTM A490M | GR - 8.8/10.9 | METRIC 6G/8G | M12-M36 | 600MM |
| DASt STD. | GR - 8.8/10.9 | METRIC 6G/8G | UPTO M64 | 600MM |
| Specifications | Grade | Thread | Dimensional Range |
|---|---|---|---|
| DIN 6915 | CLASS - 4/5/6/8/10/12/ASTM A563M | METRIC 6H,7H | M12 TO M36 |
| ISO 7414 | CLASS - 4/5/6/8/10/12/ASTM A563M | METRIC 6H,7H | M12 TO M36 |
| ANSI B 18.2.2 | GR.2/4/5/6/8/10/12 | UNC/UNF-2B/BSW/BSF | 1/2" TO 3" |
| BS 4395 I,II | CLASS - 4/5/6/8/10/12/ASTM A563M | METRIC 6H, 7H | 1/2" TO 3" |
