
ASTM A638 Grade 660 Bolts Overview
| Grade | ASTM A638 Grade 660 Bolts |
|---|---|
| Manufacturing Standard | ANSI B1.1, ASME B18.2.1, ASME B18.6.3, GB5783, IS:1364, BS 3692, UNI 5737 |
| Threads Specification | UNF-3B, UNC, UNS, UNJF-3A, UNF, UNEF, 8UN, NPT, BSF, BSW, NPTF, Metric Fine, Metric Course |
| DIN Standard | DIN 931, DIN 934, DIN 933, DIN 6923, DIN 603, DIN 912, DIN 7982, DIN 7981, DIN 970, DIN 7985, DIN 913, DIN916 |
| ISO Standard | ISO 4017, ISO 4033, ISO 4032, ISO 4014, ISO 7380 |
| Standard Sizes in mm | M4, M5, M6, M8, M10, M12, M14, M16, M20, M24, M27, M30, M36 |
SA 638 GR 660 hex nuts and ASTM A638 GR 660 fasteners suppliers in UAE
ASTM A638 Grade 660 Bolts Specification
Metric Sizes : M3 – M56, 1/2″ – 8″
Heads : Round, Square, Hex Head, Hex Flange, Flat, Triangular, T-head
ASTM A638 Grade 660 Fasteners Type : Hex Bolts, Nuts, Washers, Screws
Make : Sundaram, TVS, UNBRAKO, PFL, Fischer, LPS, BOSSARD, DFL, VIF,
BOLTMASTER
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100% Tested ASTM A638 Grade 660 Bolts with MTC EN 10204/3.1
Production Process for ASTM A638 660 Bolts
- Hot Forging
- Cold Forging
- CNC Machining
Buy ASTM A638 660 bolts at affordable prices from certified ASTM A638 GR 660 hex bolt suppliers in the Middle East
ASTM A638 Grade 660 Bolts Marking
| Grade | Class D | Class C | Class B | Class A |
|---|---|---|---|---|
| ASTM A638 Grade 660 | JS 660D NR | JS 660C | JS 660B | JS 660A |
Is ASTM A638 Gr 660 Hex Bolt Heat Treatable ?
- Yes, ASTM A638 Gr 660 Hex Bolt is Heat Treatable for higher strength & temperature application
A638 Gr 660 Material Bolt Temperature Range
| Grade | Temperature Range |
|---|---|
| SA-638 660 | 900°C ± 15°C [1650°F ± 25°F] |
Material of ASTM A638 Grade 660 Bolts
Storage Sites of Partner Suppliers
| City | Region | Country |
|---|---|---|
| Dubai | Middle East | United Arab Emirates |
| Abu Dhabi | Middle East | United Arab Emirates |
| Dammam | Middle East | Saudi Arabia |
| Riyadh | Middle East | Saudi Arabia |
| Doha | Middle East | Qatar |
| Abuja | Africa | Nigeria |
| Kuwait City | Middle East | Kuwait |
| Jeddah | Middle East | Saudi Arabia |
| Cairo | MENA | Egypt |
| Casablanca | MENA | Morocco |
| Johannesburg | Africa | South Africa |
| Cape Town | Africa | South Africa |
| Lagos | Africa | Nigeria |
ASTM A638 Grade 660 type 2 studs manufacturer in United Arab Emirates, check A638 GR 660 screws and A638 Grade 660 threaded rod sizes, dimension and price list
A638 Grade 660 Threaded Rod Dimension Chart
We have premium-grade ASTM A638 Grade 660 Bolts are Supplied in Abu Dhabi & Sharjah in stock.

| Thread Metric Sizes | Major Diameter in mm | Thread Pitch (mm) | Tapping Drill Sizes (mm) |
|---|---|---|---|
| M20 | 20 | 2.5 | 17.5 |
| M16 | 16 | 2.0 | 14.0 |
| M12 | 12 | 1.75 | 10.2 |
| M10 | 10 | 1.5 | 8.5 |
| M8 | 8 | 1.25 | 6.8 |
| M6 | 6 | 1.0 | 5.0 |
| M5 | 5 | 0.8 | 4.2 |
| M4 | 4 | 0.7 | 3.3 |
| M3 | 3 | 0.5 | 2.5 |
Coating Requirements of ASTM A638 Grade 660 Type 2 Bolt
- Hot Dipped Galvanizing
- Phosphate
- Xylon
- Zinc
- Cadmium
- Teflon
Sales Agents in Following Locations
| Muscat | Riyadh | Dubai | Ras Al Khaimah |
|---|---|---|---|
| Sharjah | Fujairah | Umm Al Quwain | Doha |
| Saudi Arabia | Al Jubail | Abu Dhabi | Ajman |
A638 Gr.660 UNS 66286 Bolt Size Chart

| d | e | s | s | k | k | f | f | g | g |
|---|---|---|---|---|---|---|---|---|---|
| min | max | min | max | Min | Max | Min | Max | ||
| 3/8″ | 0.6900 | 0.5920 | 0.6000 | 0.2500 | 0.2600 | 0.3720 | 0.3750 | 0.5720 | 0.5820 |
| 1/4″ | 0.5100 | 0.4380 | 0.4450 | 0.1660 | 0.1760 | 0.2470 | 0.2500 | 0.4180 | 0.4280 |
| 7/8″ | 1.5000 | 1.2880 | 1.3000 | 0.5630 | 0.5830 | 0.8670 | 0.8750 | 1.2630 | 1.2730 |
| 1/2″ | 0.9500 | 0.8120 | 0.8200 | 0.3330 | 0.3430 | 0.4960 | 0.5000 | 0.7900 | 0.8000 |
| 5/8″ | 1.1700 | 1 | 1.0100 | 0.4070 | 0.4170 | 0.6190 | 0.6250 | 0.9750 | 0.9850 |
| 1.1/8″ | 1.9300 | 1.6400 | 1.6700 | 0.7100 | 0.7500 | 1.1170 | 1.1250 | 1.6100 | 1.6200 |
| 1.3/8″ | 2.3700 | 2.0050 | 2.0500 | 0.8800 | 0.9200 | 1.3650 | 1.3750 | 1.9750 | 1.9850 |
| 1.3/4″ | 2.9800 | 2.5200 | 2.5800 | 1.1100 | 1.1700 | 1.7400 | 1.7500 | 2.4850 | 2.4950 |
| 5/16″ | 0.6100 | 0.5180 | 0.5250 | 0.2080 | 0.2180 | 0.3090 | 0.3130 | 0.4980 | 0.5080 |
| 7/16″ | 0.8200 | 0.7020 | 0.7100 | 0.2920 | 0.3020 | 0.4340 | 0.4380 | 0.6800 | 0.6900 |
| 9/16″ | 1.0600 | 0.9120 | 0.9200 | 0.3650 | 0.3750 | 0.5590 | 0.5630 | 0.8900 | 0.9000 |
| 3/4″ | 1.3900 | 1.1900 | 1.2000 | 0.4800 | 0.5000 | 0.7440 | 0.7500 | 1.1650 | 1.1750 |
| 1″ | 1.7100 | 1.4680 | 1.4800 | 0.6360 | 0.6660 | 0.9920 | 1 | 1.4330 | 1.4530 |
| 1.1/4″ | 2.1500 | 1.8150 | 1.8600 | 0.7900 | 0.8300 | 1.2420 | 1.2500 | 1.7850 | 1.7950 |
| 1.1/2″ | 2.5600 | 2.1750 | 2.2200 | 0.9600 | 1 | 1.4900 | 1.5000 | 2.1450 | 2.1550 |
| 2″ | 3.1900 | 2.7000 | 2.7600 | 1.2700 | 1.3300 | 1.9900 | 2 | 2.6650 | 2.6750 |
ASTM A638 Grade 660 type 1 washer, A638 GR 660 material and A638 660 hex nut/ stud bolt as per DIN 933, DIN 931
Is A638 Grade 660 Threaded Rod Magnetic ?
- No, A638 Grade 660 Threaded Rod is Non Magnetic
Warehouse Locations of Partner Suppliers
| Middle East countries | Qatar, Lebanon, Bahrain, Saudi, Kuwait, UAE, Jordan, Iraq, Syria, Iran, Yemen |
|---|---|
| Africa | Nigeria, South Africa, Kenya, Morocco, Egypt, Tunisia, Algeria |
| MENA | Morocco, Libya, Algeria, Tunisia, Egypt, Israel, Palestine |
ASTM A638 Gr 660 Type 2 Bolt Applications
Your dependable ASTM A638 Grade 660 Bolts Supplier in UAE for expertly sourced, highly grade industrial components.
Heat Treatment of ASTM A638 Grade 660 Stud
| Grade | Precipitation Hardening Treatment A | Solution Treatment | |
|---|---|---|---|
| 660 | Type 2 | 1300°F – 1400°F [705°C – 760°C] (Hold 16h, Air Cool) | 1800°F ± 25°F [980°C ± 15°C], hold 1 h, oil or water quench |
| Type 1 | 1650°F ± 25°F [900°C ± 15°C], hold 2 hr, oil or water quench | ||
Check Out Your Nearby Locations For Fastest Deliveries
| Country | Cities |
|---|---|
| Netherlands | The Hague |
| Belgium | Meeuwen-Gruitrode |
| Netherlands | Amsterdam |
| Belgium | Antwerp |
| Netherlands | Haarlem |
| Belgium | Brussels |
| Belgium | Seraing |
| Belgium | Ghent |
| Belgium | Leuven |
| Netherlands | Eindhoven |
| Belgium | Westerlo |
| Netherlands | Rotterdam |
Buy A638 GR.660 UNS 66286 heavy hex bolt from saudi aramco approved SA 638 GR 660 socket head cap screw suppliers at a great price in Dubai
ASTM A638 Gr 660 Bolt Industrial Advantages
- Outstanding Performance in Toughest
- Oxidation is Minimize
- Higher Temperature Services
- Excellence Mechanical Properties
- Highly Creep Stress & Rupture Property
- Intergranular Corrosion & Overcome Sensitization
Weight Chart for ASTM A638 Grade 660 Type 1 Bolt
| Nominal Metric Sizes | Weight per Metre |
|---|---|
| M39 | 8.200 |
| M36 | 6.900 |
| M33 | 5.900 |
| M30 | 4.750 |
| M27 | 3.850 |
| M24 | 3 |
| M22 | 2.540 |
| M16 | 1.330 |
| M20 | 2.080 |
| M14 | 0.970 |
| M12 | 0.725 |
| M10 | 0.500 |
| M8 | 0.319 |
| M6 | 0.177 |
| M5 | 0.124 |
| M4 | 0.078 |
| M3.5 | 0.060 |
| M3 | 0.044 |
| M2.5 | 0.030 |
| M2 | 0.0187 |
A638 Gr 660 Fastener Chemical Composition
| Elements | Ladle Analysis Range, % |
|---|---|
| Phosphorus | 0.030 (max.) |
| Carbon | 0.08 (max.) |
| Titanium | 1.90 – 2.35 |
| Silicon | 1.00 (max.) |
| Nickel | 24.00 – 27.00 |
| Vanadium | 0.10 – 0.50 |
| Manganese | 2.00 (max.) |
| Phosphorus | 0.040 (max.) |
| Chromium | 13.50 – 16.00 |
| Molybdenum | 1.00 – 1.50 |
| Aluminum | 0.35 (max.) |
| Boron | 0.0010 – 0.010 |
Mechanical Properties of ASTM A638 660 Stud Bolt
| Properties | Values | |
|---|---|---|
| Yield strength (0.2 % offset), (min.) | 585 Mpa | 85 000 Psi |
| Tensile strength, (min.) | 895 MPa | 130 000 Psi |
| Elongation (4D) | 15% | |
| Brinell Hardness | 248 min | |
| Reduction of Area | 18% | |
Which Din Standard Is Applicable For A638 Gr 660 Material ?
- DIN 1.4944, 1.4980 & 1.4943 are the Standard which is Applicable For A638 Gr 660 Material
What Is A638 Gr.660 UNS 66286 Heavy Hex Bolt’s Hardness ?
| Grade | Brinell Hardness |
|---|---|
| SA 638 Gr 660 | 248 min |
Our Dealers and Distributors in Below Locations
| Abu Dhabi | Sharjah |
| Umm Al Quwain | Fujairah |
| Dubai | Ajman |


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