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Introducing GIC Fasteners' Stainless Steel 347/347H Screws, the epitome of precision engineering and reliability. Crafted to meet a spectrum of industry standards including DIN, ASTM, ISO, and BS, these screws are designed to excel in high-temperature and corrosive environments. Our commitment to quality ensures they adhere to equivalent international standards, making them the go-to choice across aerospace, petrochemical, power generation, and various other industries. When you choose GIC Fasteners, you're selecting screws engineered for the most demanding applications, promising steadfast performance, and unwavering strength. Trust us for solutions that not only meet but exceed industry expectations.
When it comes to high-temperature and corrosive environments, Stainless Steel 347/347H Screws are the ultimate choice. At GIC Fasteners, we’ve perfected the art of manufacturing these exceptional fasteners. These screws, made from the 347 stainless steel alloy, are engineered to withstand extreme conditions with unrivaled strength and corrosion resistance. Whether you’re in the aerospace, petrochemical, or power generation industry, our 347/347H screws are the reliable solution you need for your critical applications.
At GIC Fasteners, we take pride in being experts in the field. Our commitment to quality and precision ensures that every screw we produce adheres to the highest industry standards. Whether you require screws for chemical processing, oil & gas, or medical devices, our Stainless Steel 347/347H Screws deliver uncompromising performance. Contact our expert team at sales@gicfasteners.com to discuss your specific requirements and experience the reliability and durability of GIC Fasteners’ products firsthand.
| Specifications | : | ASTM A 193 / ASME SA 193 |
| Standard | : | DIN, ASTM, BS, ISO and all International Standards |
| Length | : | 3 mm to 200 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Hex Head Screw, Socket Head Cap Screw, Cheese Head Screws, Anchor Screw, Button Head Screws, Concrete screw, Threaded Screw, Pan Head Screw, Panel Screw, Machine Screw. |
| Grade | C | Mn | Si | P | S | Cr | Ni | Ti |
| 347 | 0.08 max. | 2.00 max. | 0.75 max. | 0.045 max. | 0.03 max. | 17.0 – 19.0 | 9.0-13.0 | 10 x C min.(1.00 max.) |
| 347H | 0.04 – 0.10 | 2.00 max. | 0.75 max. | 0.045 max. | 0.03 max. | 17.0 – 19.0 | 9.0-13.0 | 8 x C min. 1.00 max.) |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.96 g/cm3 | 1450 °C | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 % |
| STANDARD | WERKSTOFF NR. | UNS |
| SS 347 | 1.4550 | S34700 |
| SS 347H | 1.4961 | S34709 |
Flat Head Machine Screws
| Nominal Size | A | H | J | T | M | G | N | Phillips Driver Size | |||||
| Head Diameter | Height of Head | Width of Slot | Depth of Slot | Dimensions of Recess | |||||||||
| Diameter | Depth | Width | |||||||||||
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | ||
| 2 4 5 6 7* 8 9* 10 12 14* 1/4 5/16 3/8 1/2 | .172 .225 .252 .279 .305 .332 .358 .385 .438 .491 .507 .635 .762 .875 | 147 .195 .220 .244 .268 .292 .316 .340 .389 .437 .452 .568 .685 775 | .051 .067 .075 .083 .091 .100 .108 .116 .132 .148 .153 .191 .230 .223 | .040 .055 .062 .069 .076 .084 .091 .098 .112 .127 .131 .165 .200 .198 | .031 .039 .043 .048 .048 .054 .054 .060 .067 .075 .075 .084 .094 .106 | .023 .031 .035 .039 .039 .045 .045 .050 .056 .064 .064 .072 .081 .091 | .023 .030 .034 .038 .041 .045 .049 .053 .060 .068 .070 .088 .106 .103 | .015 .020 .022 .024 .027 .029 .032 .034 .039 .044 .046 .058 .070 .065 | .102 .128 .154 .174 .182 .189 .258 .204 .268 .283 .283 .365 .393 .424 | .089 .115 .141 .161 .169 .176 .245 .191 .255 .270 .270 .352 .380 .411 | .063 .089 .086 .106 .114 .121 .146 .136 .156 .171 .171 .216 .245 .276 | .017 .018 .027 .029 .030 .031 .034 .032 .036 .039 .035 .061 .065 .069 | 1 1 2 2 2 2 2 2-3* 3 3 3 4 4 4 |
| Nominal Size | A | W | H | F | U | J | T | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Width Across Flats | Width Across Corners | Height of Head | Diameter of Washer | Thickness of Washer | Width of Slot | Depth of Slot | |||||||
| Max. | Min. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | |
| 4 6 7 8 10 12 14 1/4 5/16 3/8 | .187 .250 .250 .250 .312 .312 .438 .375 .500 .562 | .181 .244 .244 .244 .305 .305 .428 .367 .489 .551 | .202 .272 .272 .272 .340 .340 .409 .409 .545 .614 | .060 .093 .093 .110 .120 .155 .190 .190 .230 .295 | .049 .080 .080 .096 .105 .139 .172 .172 .208 .270 | .243 .328 .328 .348 .414 .432 .520 .520 .676 .780 | .225 .302 .302 .322 .384 .398 .480 .480 .624 .720 | .019 .025 .029 .031 .031 .039 .050 .050 .055 .063 | .011 .015 .017 .019 .019 .022 .030 .030 .035 .037 | .039 .048 .048 .054 .060 .067 .075 .075 .084 .094 | .031 .039 .039 .045 .050 .056 .064 .064 .072 .081 | .042 .053 .062 .074 .080 .103 .111 .111 .134 .168 | .025 .033 .040 .052 .057 .077 .083 .083 100 .131 |
|
Nominal
|
Thread.
|
Hex Socket Size
|
Body diameter and Head height
|
Head Dia
|
Soc. length
|
||
|
Size
|
Pitch
|
Max
|
Min
|
Max
|
Min
|
||
|
J
|
D /H
|
A
|
K
|
||||
|
M3
|
0.5
|
2.50
|
3.00
|
2.86
|
5.50
|
5.20
|
1.3
|
|
M4
|
0.70
|
3.00
|
4.00
|
3.82
|
7.00
|
6.64
|
2.00
|
|
M5
|
0.8
|
4.00
|
5.00
|
4.82
|
8.50
|
8.14
|
2.70
|
|
M6
|
1.0
|
5.00
|
6.00
|
5.82
|
10.00
|
9.64
|
3.30
|
|
M8
|
1.25
|
6.00
|
8.00
|
7.78
|
13.00
|
12.57
|
4.3
|
|
M10
|
1.5
|
8.00
|
10.00
|
9.78
|
16.00
|
15.57
|
5.50
|
|
M12
|
1.75
|
10.00
|
12.00
|
11.73
|
18.00
|
17.57
|
6.60
|
|
M16
|
2.0
|
14.00
|
16.00
|
15.73
|
24.00
|
23.48
|
8.80
|
|
M20
|
2.5
|
17.00
|
20.00
|
19.67
|
30.00
|
29.48
|
10.70
|
|
M24
|
3.0
|
19.00
|
24.00
|
23.67
|
36.00
|
35.38
|
12.90
|
| Industries | Applications |
|---|---|
| Aerospace | Used in aircraft engines, exhaust systems, and structural components due to their ability to withstand high temperatures and corrosive conditions. |
| Petrochemical | Ideal for petrochemical plants, these screws are resistant to chemical corrosion and are used in equipment for processing and transporting chemicals. |
| Power Generation | Commonly employed in power plants for their resistance to high-temperature steam and aggressive combustion environments. |
| Chemical Processing | Used in reactors, pipelines, and vessels where resistance to corrosive chemicals at elevated temperatures is crucial. |
| Oil & Gas | Key components in offshore drilling rigs and refineries, withstanding exposure to harsh seawater and hydrocarbon environments. |
| Food Processing | Commonly used in food and beverage plants where hygiene, corrosion resistance, and high-temperature performance are essential. |
| Medical Devices | Used in the manufacture of medical equipment and surgical instruments due to their biocompatibility and resistance to bodily fluids. |
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Stainless Steel 347 screws contain columbium for stabilization, while 347H screws are high-carbon variants designed for elevated temperature service.
Yes, these screws offer high corrosion resistance and can endure harsh conditions, including acidic and chloride-rich environments.
Stainless Steel 347 screws can withstand temperatures up to 1600°F (870°C), and 347H screws can handle even higher temperatures, up to 2100°F (1150°C).
Yes, they are weldable, but post-weld heat treatment may be necessary for optimal performance in specific applications.
These screws find applications in various industries, including petrochemical, chemical processing, aerospace, and power generation.
Yes, GIC Fasteners offers customization options to meet specific size, threading, and other requirements.
Lead times may vary, but GIC Fasteners strives to provide prompt delivery based on order specifications and quantities.
Regular inspection, cleaning, and avoiding exposure to extreme conditions will help prolong the life and performance of these screws.
Indeed, Stainless Steel 347/347H screws are often chosen for nuclear applications due to their exceptional resistance to radiation and high-temperature environments.
