AMT Fastener Division specializes in manufacturing of standard and special fasteners to customer specific and as per project requirements. We manufacture to order, ranging from one-off to small, medium and large batch quantities as per customer instructions. We specialize in quality fasteners for uses including Head resistant / pressure resistant / corrosion resistant application in the Oil, Gas, Petro Chemical and Power Industries.
Our products varies from foundational anchor bolts, stud bolts, threaded rods, u bolts, hexagonal bolts, dowel bars etc in carbon steel, alloy steel, stainless steel etc.
We are compliant and certified as per ISO 9001, 14001 & 45001 global standards and hold approvals from various companies including SABIC, Saudi Aramco, RC etc. All our batches are sent along with Test Certification, Certificate of conformity etc as per QC standards.
FASTENERS
Heavy Hex Structural Bolts – ASTM A325M
- The Bolts will generally conform to ANSI B.18.23.7M – Metric Heavy Hex Structural Bolts
- Treads will conform to 6g of ANSI B1.13M
- Material : High grade carbon/alloy steel
- Heat Treatment : As per ASTM A325M and ASTM F568 class 8.8
- Thread Length LT.LT1 for L <= 100, LT2 for L > 100
- All dimensions are in millimeters
Hexagon Head Bolts / Screws DIN 931/933
- The Bolts and screws will generally conform to ISO 4014,ISO 4017 and DIN 931/933
- Threads will confirm to Class 6g of ISO 965/2 Coarse Series
- Material : High grade carbon/alloy steel
- Heat Treatment : Property Class 6.6 or 10.9
- Thread Length LT. LT1 for L <= 125, LT2 for L > 125 to 200, LT3 for L > 200
- Screw length equal to or shorter than those listed in coloumn ‘LFT’ will be a fully threaded
- Sizes in brackets are non-preferred standards.
- All dimensions are in millimeters
Physical Properties
| No | PROPERTY CLASS | 5.8 | 6.8 | 8.8 ≤M16 | 8.8 >M16 | 10.9 |
|---|---|---|---|---|---|---|
| 1 | Tensile Strength, (Min.) | 520 | 600 | 800 | 830 | 1040 |
| 2 | Yield Strength, 0.2% offset (Min.) | 420 | 480 | 640 | 660 | 940 |
| 3 | Proof Load Stress | 380 | 440 | 580 | 600 | 830 |
| 4 | Shear Strength, (Min.) | 300 | 360 | 480 | 498 | 624 |
| 5 | Hardness Rockwell | B82 – B99.5 | B89 – B99.5 | C22 – C32 | C23 – C34 | C32 – C39 |
| 6 | Elongation % on GL= 5.65 √A (Min)A = Cross Sectional Area. |
10 | 8 | 12 | 12 | 9 |
Hexagon Head Bolts / Screws – SAE J429
- The bolts/screws will generally conform to SAE J429. (Bolts/Screws which will also generally conform to American Standard ANSI B18.2.2.1)
- Threads will conform to Class 2A of Unified threads(Coarse/Fine) of ANSI B1.1
- Material: High grade carbon/alloy steel
- Heat Treatment: As per Grade 5 or 8 (Bolts/Screws made to Grades 5 and 8 as per SAE J429 will also generally conform to requirements of BS 1768 Grade S and V respectively).
- Thread Length LT: LT1 for L ≤ 6 LT2 for L > 6
- Screw Lengths equal to or shorter than those listed in column LFT will be fully threaded
- All dimensions are in inches.
Physical properties
| No | Physical properties | Grade 5 | Grade 8 |
|---|---|---|---|
| 1 | Tensile Strength (Min.) psi | 120000 | 150000 |
| 2 | Tensile Strength (min.)(N/mm2) | 827 | 827 1034 |
| 3 | Proof Load Stress psi | 85000 | 120000 |
| 4 | Proof Load Stress N/mm2 | 586 | 827 |
| 5 | Elongation % on GL=2″ (Min.) | 14% | 12% |
| 6 | Rockwell Hardness HR | C25 – C34 | C33 – C39 |
| 7 | Reduction of Area % (Min.) | 35% | 35% |
Hexagon Strength Friction Grip Bolts(10.9 Gr.)
- Standard Specification : BS 4395 Part 2 Equivalent to DIN 6914, 6915
- Material : Alloy Steel
- Strength Grade : Class 10.9
- Threads : 6H of BS 3643 Part 1 & 2
- Surface Finish : Black, Hot Dipped Galvanized
