17-4 PH Torx Screws
RAYCHIN SPECIALTY METALS FASTENERS: BOLTS, NUTS, SCREWS, WASHERS, STUDS, THREADED RODS, U-BOLT, J-BOLTS
STANDARD AND CUSTOMIZED, SMALL BATCH AND LARGE BATCH, IMPERIAL AND METRIC
An extremely strong precipitation hardened stainless steel
· Well suited for high strength applciaitons
· Up to 4x stronger than 316 stainless steel
· Maintains its mechanical strength up to 600°F
· 17-4PH Chemistry & Specifications
· 17-4PH Torx screw features and benefits
· 17-4PH Datasheet
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17-4 PH Torx Screws: Star Drive, Hexalobular Socket, Pan Head, Button Head & Custom Configurations
RAYCHIN LIMITED is a recognized expert in 17-4 PH Torx screws — from 17-4 PH star drive screws, 17-4 PH hexalobular socket screws, 17-4 PH Torx pan head screws, 17-4 PH Torx button head screws, 17-4 PH Torx flat head screws to custom non-standard Torx screw configurations. The Torx drive system, standardized under ISO 10664, offers superior torque transfer, resists cam-out, and reduces driver bit wear compared to conventional drives. Our portfolio includes Torx screws manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN and KS standards. Engineered for extreme environments: aerospace, automotive, electronics, medical devices, and marine industries where high temperature resistance and corrosion protection are critical. 17-4 PH Torx screws are available in all heat treatment conditions with precision rolled threads and full traceability.
Complete Range of 17-4 PH Torx Screws
Torx Pan Head Screws
17-4 PH Torx pan head screws with rounded top and flat bearing surface. Manufactured to ISO 14579 and ASME B18.3 specifications. The Torx drive (hexalobular internal) provides high torque transmission without cam-out. Ideal for general industrial applications, electronics, and automotive assemblies. Available in sizes from #2 to 1" (M2 to M24). Heat treated to H900 through H1150 conditions for tensile strengths up to 190 ksi (1310 MPa).
Torx Button Head Screws
17-4 PH Torx button head screws with low-profile domed head for applications requiring smooth appearance and reduced head height. Manufactured to ISO 14580 and ASME B18.3. The Torx drive allows for higher torque capacity than hex heads while maintaining a compact envelope. Ideal for limited clearance applications in aerospace, medical devices, and precision equipment. Available in all standard sizes with full traceability.
Torx Flat Head Screws
17-4 PH Torx flat head screws (countersunk) for flush mounting applications. Manufactured to ISO 14582 and ASME B18.3. Available in 82° and 90° head angles for inch and metric sizes. The Torx drive provides positive engagement and reduces the risk of recess damage during installation. Ideal for aerospace and defense applications where flush surfaces are required.
Torx Socket Head Cap Screws
17-4 PH Torx socket head cap screws combining the high strength of socket head screws with the superior torque transfer of Torx drive. Manufactured to ISO 14579 and DIN 7984. The hexalobular socket (Torx) drives without cam-out and extends tool life. Available in diameters from M3 to M20 with various thread lengths. Ideal for high-vibration applications and automated assembly lines.
Aerospace & Military Torx Screws
17-4 PH Torx screws manufactured to NAS, AN, and MS specifications. Available with UNJF-3A threads per MIL-S-8879 for enhanced fatigue life. Torx drive provides consistent torque transfer critical for aerospace assemblies. Shot peened per aerospace requirements and available with silver or cadmium plating for anti-galling. Full traceability with material certification and third-party testing available.
Custom & Specialty 17-4 PH Torx Screws
Need a special head configuration, unusual drive size, or custom thread combination? RAYCHIN engineers work with you to produce custom 17-4 PH Torx screws to your drawing. Expert heat treatment (H900, H925, H1025, H1075, H1100, H1150, H1150M, H1150D) precisely controlled for each batch. Manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS standards. Custom drive depths and tamper-resistant configurations available.
The Torx Drive Advantage for 17-4 PH Screws
Cam-Out Resistance
Unlike Phillips drives that are designed to cam-out, Torx drives resist cam-out, allowing higher torque transmission and reducing driver bit wear.
Extended Tool Life
The star-shaped pattern distributes forces across multiple flanks, reducing stress on both the screw head and driver bit. Torx bits last significantly longer than hex or Phillips bits.
Higher Torque Capacity
Torx drive systems can transmit up to 40% more torque than conventional hex drives for the same head size, critical for high-strength 17-4 PH fasteners.
Tamper Resistance
Torx drives are less common than Phillips or slotted drives, providing inherent tamper resistance. Security Torx variants with center pins are available for anti-tamper applications.
Manufacturing Standards for 17-4 PH Torx Screws
RAYCHIN LIMITED manufactures 17-4 PH Torx screws to the following national and international standards, ensuring full compliance for projects worldwide. The Torx drive interface conforms to ISO 10664 (hexalobular drives). Both standard and non-standard custom configurations are available.
International Standards & Global Designations for 17-4 PH Torx Screws
To serve clients worldwide, RAYCHIN LIMITED manufactures 17-4 PH Torx screws from material conforming to the following national and international specifications. This ensures full compliance for projects in the Americas, Europe, Asia, and the Middle East.
ASTM A564 GR.630 ASTM A193 GR.630 ASTM F593 GR.630 AMS 5643 1.4542 SUS630 UNS S17400 NACE MR0175 17-4PH
Chemical Composition (Weight %) – 17-4 PH Precipitation Hardening Stainless Steel
Our 17-4 PH Torx screws are produced from melts that strictly conform to the limits below per ASTM A564 / AMS 5604. The precise addition of copper and niobium enables age-hardening to achieve high strength.
Expert note: The Nb/Cu ratio ensures consistent precipitation of coherent copper-rich clusters during aging. This yields tensile strengths up to 190 ksi (1310 MPa) in the H900 condition while retaining good ductility. 17-4 PH is up to 4x stronger than 316 stainless steel. All raw material is positively identified by PMI (Positive Material Identification) and certified with mill test reports.
Complete Mechanical Properties of 17-4 PH Torx Screws (by Heat Treatment per ASTM A564/A564M)
17-4 PH Torx screws are available in eight standard heat treatment conditions. RAYCHIN LIMITED recommends the appropriate temper based on your strength vs. toughness requirements. The data below represent minimum values for the material (longitudinal direction) per ASTM A564 Table 3.
Condition H900 (480°C / 900°F) – Highest Strength
Condition H925 (495°C / 925°F) – Slightly lower strength, improved toughness
Condition H1025 (550°C / 1025°F) – Best combination of strength & toughness
Condition H1075 (580°C / 1075°F) – Improved ductility
Condition H1100 (595°C / 1100°F) – Enhanced toughness
Condition H1150 (620°C / 1150°F) – Maximum stress corrosion resistance
Condition H1150M (760°C + 620°C / 1400°F + 1150°F) – Double aged, maximum ductility (NACE MR0175 approved)
Condition H1150D (620°C + 620°C / 1150°F + 1150°F) – Double aged, improved properties (NACE MR0175 approved)
Additionally, 17-4 PH Torx screws exhibit excellent fracture toughness and very high fatigue strength. Our test certificates include actual values from each production lot. For sour service (NACE MR0175), H1150M or H1150D conditions are recommended for optimal sulfide stress corrosion cracking resistance.
High Temperature Performance of 17-4 PH Torx Screws
17-4 PH stainless steel maintains excellent mechanical properties up to 316°C (600°F), making it ideal for high-temperature applications in aerospace, power generation, and automotive systems.
Temperature-Dependent Strength Retention (Condition H900)
17-4 PH maintains its mechanical strength up to 600°F (316°C), with good properties retained even at higher temperatures. For continuous service above 400°C, special heat treatments or alternative alloys should be considered. Avoid long-term exposure to temperatures between 370-480°C to prevent loss of toughness at ambient temperature.
Thermal Stability Limits
Corrosion Resistance of 17-4 PH Torx Screws
17-4 PH stainless steel offers excellent corrosion resistance comparable to 304 stainless steel in many environments, attributed to its high chromium content (15-17.5%) which forms a protective Cr₂O₃ passive layer. The corrosion behavior is significantly influenced by heat treatment condition and aging parameters.
Corrosion Performance in Different Environments
Effect of Heat Treatment on Corrosion Resistance
Critical Corrosion Considerations for Torx Screws
- Sensitization: Aging above 495°C can cause chromium carbide precipitation at grain boundaries, leading to chromium depletion and increased susceptibility to intergranular corrosion. However, 17-4 PH is generally less susceptible to sensitization than conventional martensitic grades due to low carbon content.
- Optimal Aging: Specimens aged at 460°C for 2h or 480°C for 4h demonstrate minimal signs of sensitization and very low degrees of sensitization in DL-EPR tests.
- NACE MR0175 Compliance: For sour service applications, only H1150M and H1150D double-aged conditions are permitted with maximum hardness of 28 HRC.
- Comparison to 304: 17-4 PH offers comparable corrosion resistance to 304 stainless steel in many environments, with significantly higher strength (up to 4x stronger than 316).
Corrosion Engineering Note: For critical applications in aggressive environments, RAYCHIN LIMITED can provide passivation, specialized coatings (Xylan, PTFE, silver plating), or recommend optimal heat treatment conditions (H1150, H1150M for maximum stress corrosion cracking resistance). Third-party corrosion testing per ASTM G31, G48, or G61 available upon request. NACE MR0175 compliant Torx screws available in H1150M and H1150D conditions.
Special focus: 17-4 PH Torx Screws for Aerospace & Automotive Applications
For critical applications requiring superior torque transfer and drive reliability, RAYCHIN offers 17-4 PH Torx screws manufactured to NAS, MS, DIN, ISO, and customer-specific specifications. Our capabilities include:
- Aerospace Standards: NAS 1351, NAS 1352, MS 16995, MS 16996 with Torx drive configurations
- International Standards: ISO 14579 (pan head), ISO 14580 (button head), ISO 14582 (flat head), ISO 10664 (drive interface)
- Thread Specifications: UNJF-3A per MIL-S-8879, metric MJ threads, standard UNRC/UNRF and metric coarse/fine
- Torx Drive Sizes: TX6 through TX70, custom drive depths, tamper-resistant security Torx with center pin
- Surface Treatments: Silver plating per AMS 2410, cadmium plating per AMS 2400, passivation per AMS 2700
- High Temperature: Continuous service up to 316°C (600°F) with retained mechanical properties
- Sour Service (NACE MR0175): H1150M and H1150D double-aged conditions with hardness ≤ 28 HRC
- Custom: Special head configurations, unique drive sizes, and custom thread combinations per customer drawings
All 17-4 PH Torx screws are supplied in conditions H900 through H1150D, with full traceability and third-party NDT upon request.
Why RAYCHIN LIMITED – The 17-4 PH Torx Screw Authority
Metallurgical competence
Engineers on staff with deep expertise in precipitation hardening. We control aging parameters to ±5°C for consistent mechanical properties across all 17-4 PH Torx screws. Every heat is verified by in-house testing.
Global approvals & traceability
Our quality system is ISO 9001:2015 and AS9100D certified; we also comply with NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN and KS. Full material traceability from melt to final packaging (EN 10204 3.1/3.2). Third-party inspections (ABS, DNV, Lloyds) available.
Precision Torx forming
In-house precision cold heading and CNC machining ensure consistent Torx drive geometry per ISO 10664. Full drive inspection available with optical comparators and go/no-go gauges. Torque testing per IFI standards available.
Custom solutions
Need a special head configuration, unusual drive size, or custom thread combination? Our CNC turning and cold heading departments handle short runs with agility. We also provide specialized coatings and corrosion testing per aerospace requirements.
Contact the 17-4 PH Torx screw experts today
Request a quote for 17-4 PH Torx pan head screws, Torx button head screws, Torx flat head screws & custom configurations – any global standard (NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS), any condition, any quantity. Inquire about high temperature or NACE MR0175 sour service applications.
sales@ray-chin.com | +86 534 2166 566Our team speaks English, German, Mandarin, and Japanese – ready for your global procurement.
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17-4 PH Button Head Cap Screws
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