Machine Screws

Security Screws in Special Alloys | Tamper-Proof Fasteners & Anti-Theft Screws | RAYCHIN Manufacturer

RAYCHIN manufactures precision security screws in 25+ exotic alloys: 17-4 PH, Inconel 718, MP35N, Titanium, A286, Hastelloy & more. Pin-in-hex, one-way, spanner, tri-wing, torx tamper-proof. Custom OEM security fasteners for aerospace, medical, transportation & public infrastructure.

Security Screws: Engineered Tamper-Proof Fastening Solutions

RAYCHIN is a specialized manufacturer of security screws, also known as tamper-proof screws, anti-theft fasteners, or security fasteners. These specialized threaded components feature unique drive systems designed to prevent unauthorized removal, vandalism, and tampering. Unlike conventional screws, security screws require matching specialized tools for installation and removal, making them essential for public infrastructure, transportation systems, correctional facilities, medical devices, electronic enclosures, and aerospace applications where security, safety, and vandalism resistance are critical.

We engineer these components from over 25 advanced alloys, ensuring reliable performance in corrosive, high-temperature, outdoor, and high-wear environments. Our security screws are manufactured to exacting customer specifications and international standards, with complete material certification and full traceability.

Security Screw Drive Types & Classifications

1. Standard Security Drive Systems:

2. Head Styles Available:

• Flat Head (Countersunk): 82°, 90°, 100° for flush mounting

• Pan Head: Low-profile domed head

• Button Head: Low-profile rounded head

• Truss Head: Extra-wide bearing surface

• Oval Head: Decorative raised dome

• Flange Head: Integrated washer

• Custom Head Styles: Manufactured to OEM specifications

3. Special Application Security Screws:

• Frangible / Break-Away Screws: Head shears off at preset torque after installation

• One-Way Clutch Screws: Can only be installed, not removed

• Captive Panel Screws: Remain attached to panel when loosened

• Self-Locking Security Screws: With nylon patch or pellet for vibration resistance

• Sealing Security Screws: With O-ring or bonded seal for environmental protection

• Custom Security Screws: Manufactured to your exact OEM drawings with unique drive geometries, head styles, thread forms, and material grades

Full Material Portfolio with International Standard Designations

We produce security screws in the following comprehensive range of high-performance materials:

1. Precipitation-Hardening Stainless Steels:

• 17-4 PH (UNS S17400): ASTM A564 Type 630, AMS 5643, DIN 1.4542 — H900, H1025, H1150 tempers. Excellent combination of high strength (to 180 ksi) and corrosion resistance. Ideal for high-security outdoor applications. *Keywords: 17-4 PH security screws, 17-4 PH tamper-proof screws.*

• PH 13-8 Mo (UNS S13800): ASTM A564 Type 625, AMS 5629 — Superior strength, toughness, and stress corrosion cracking resistance. *Keywords: PH 13-8 Mo security screws.*

2. Nickel-Based Superalloys:

Inconel® Alloys:

• Inconel 600 (UNS N06600): ASTM B166, AMS 5665 — General purpose high-temperature alloy with oxidation and corrosion resistance to 2000°F. Keywords: Inconel 600 security screws.

• Inconel 625 (UNS N06625): ASTM B446, AMS 5666 — Excellent resistance to pitting, crevice corrosion, and high-temperature oxidation. *Keywords: Inconel 625 tamper-proof screws.*

• Inconel 718 (UNS N07718): AMS 5663, ASTM B637 — High-strength alloy with exceptional creep rupture strength up to 1300°F. Keywords: Inconel 718 security fasteners.

Monel® Alloys:

• Monel 400 (UNS N04400): ASTM B164, AMS 4675 — Superior resistance to seawater, steam, and caustic environments. Keywords: Monel 400 security screws.

• Monel K500 (UNS N05500): ASTM B865, AMS 4676 — Age-hardenable version offering increased strength and hardness. *Keywords: Monel K500 tamper-proof screws.*

Hastelloy® Alloys:

• Hastelloy C276 (UNS N10276): ASTM B574, AMS 5754 — Excellent resistance to wide range of corrosive chemicals including strong oxidizers and reducing agents. Keywords: Hastelloy C276 security screws.

• Hastelloy C22 (UNS N06022): ASTM B574, AMS 5755 — Superior resistance to oxidizing media and localized corrosion. *Keywords: Hastelloy C22 tamper-proof fasteners.*

• Hastelloy B2 (UNS N10665): ASTM B335 — Exceptional resistance to reducing acids like hydrochloric and sulfuric. Keywords: Hastelloy B2 security screws.

Incoloy® Alloys:

• Incoloy 825 (UNS N08825): ASTM B423, AMS 5870 — Excellent resistance to reducing and oxidizing acids, stress corrosion cracking. Keywords: Incoloy 825 security screws.

• Incoloy 925 (UNS N09925): ASTM B805 — High-strength, age-hardenable alloy for sour gas environments. *Keywords: Incoloy 925 tamper-proof screws.*

High-Temperature Alloys:

• Waspaloy (UNS N07001): AMS 5708, AMS 5824 — Precipitation-hardenable alloy for jet engine and gas turbine applications to 1600°F. Keywords: Waspaloy security fasteners.

• Nimonic® Series:

  • Nimonic 80A (UNS N07080): BS HR 501, AMS 5842 — Creep and rupture strength up to 1500°F.

  • Nimonic 90 (UNS N07090): BS HR 502, AMS 5796 — Enhanced high-temperature properties with excellent oxidation resistance. *Keywords: Nimonic 80A security screws, Nimonic 90 tamper-proof screws.*

3. Duplex & Super Duplex Stainless Steels:

• Duplex 2205 (UNS S32205/S31803): ASTM A193 B8S, EN 1.4462 — Twice the yield strength of 316 stainless with excellent chloride stress corrosion resistance. Keywords: Duplex 2205 security screws.

• Super Duplex Alloys:

  • Alloy 926 (UNS N08926): ASTM B691, EN 1.4529 — PREN >40 for severe chloride and seawater environments.

  • AL-6XN® (UNS N08367): ASTM B691, AMS 5875 — Superior pitting and crevice corrosion resistance in highly chlorinated atmospheres. *Keywords: AL-6XN security screws, Alloy 926 tamper-proof screws.*

4. Titanium Alloys:

• Grade 2 Titanium (UNS R50400): ASTM B348, AMS 4921 — Excellent corrosion resistance with good formability. Keywords: Titanium Grade 2 security screws.

• Grade 5 Titanium (Ti-6Al-4V) (UNS R56400): AMS 4928, ASTM F467 — High strength-to-weight ratio, ideal for aerospace and medical security applications. *Keywords: Titanium Grade 5 tamper-proof screws.*

5. Refractory & Exotic Metals:

• Tantalum (UNS R05200): ASTM B365, AMS 7845 — Ultimate corrosion resistance in aggressive acid environments. Keywords: Tantalum security screws.

• Zirconium 702 (UNS R60702): ASTM B550, ASME SB550 — Excellent resistance to sulfuric, hydrochloric, and nitric acids. Keywords: Zirconium security fasteners.

• Molybdenum (UNS R03600): ASTM B387 — High temperature strength and stiffness for extreme thermal applications to 3000°F. Keywords: Molybdenum security screws.

• Tungsten: ASTM B777 — Highest density and melting point for specialized radiation shielding and high-security applications. Keywords: Tungsten tamper-proof screws.

6. Specialty Stainless Steels & Nickel Alloys:

• Nitronic® Alloys:

  • Nitronic 50 (XM-19) (UNS S20910): ASTM A193 B8N — High strength, non-magnetic, excellent corrosion resistance.

  • Nitronic 60 (UNS S21800): ASTM A193 B8N — Superior wear and galling resistance; ideal for frequently accessed security fasteners. *Keywords: Nitronic 60 security screws, Nitronic 50 tamper-proof screws.*

• High-Performance Stainless:

  • 254 SMO (UNS S31254): EN 1.4547, ASTM A479 — Excellent seawater and chloride resistance with high PREN value.

  • 310 Stainless Steel (UNS S31000): ASTM A276, AISI 310 — Outstanding high-temperature oxidation resistance up to 2000°F. *Keywords: 254 SMO security screws, 310SS tamper-proof screws.*

  • Alloy 20 (Carpenter 20) (UNS N08020): ASTM B473 — Superior resistance to sulfuric acid and chloride stress corrosion. Keywords: Alloy 20 security fasteners.

  • Alloy 330 (UNS N08330): ASTM B536 — Excellent carburization and oxidation resistance at elevated temperatures. Keywords: Alloy 330 security screws.

7. Ultra-High-Strength Cobalt Alloys:

• MP35N (UNS R30035): AMS 5844, ASTM F562 — Ultimate tensile strength exceeding 300 ksi with exceptional toughness and corrosion resistance. Keywords: MP35N security screws.

• MP159 (AMS 5846): Advanced cobalt-nickel alloy offering high strength and creep resistance at elevated temperatures. *Keywords: MP159 tamper-proof screws.*

8. High-Strength Aluminum & Iron-Based Alloys:

• Aluminum 7075 (UNS A97075): AMS QQ-A-225/9, ASTM B211 — Available in T6, T73, T76 tempers. High strength-to-weight ratio. Keywords: Aluminum 7075 security screws.

• A286 (UNS S66286): AMS 5731, ASTM A453 Grade 660 — Iron-based superalloy with excellent high-temperature strength and oxidation resistance to 1300°F. *Keywords: A286 tamper-proof fasteners.*

9. Pure Nickel:

• Nickel 200/201 (UNS N02200/N02201): ASTM B160, ASME SB160 — High purity and excellent corrosion resistance in caustic environments. Keywords: Nickel 200 security screws.

Custom Security Screw Manufacturing & Quality Assurance

RAYCHIN provides complete custom security screw manufacturing services tailored to your exact specifications:

Manufacturing Capabilities:

• Precision CNC Machining: Swiss-style turning and multi-axis milling for complex drive geometries and tight tolerances (±0.01mm).

• Cold Heading: High-volume production with superior grain flow and material strength.

• Drive Forming: Precision broaching, cold forming, and machining of tamper-resistant drive recesses.

• Thread Rolling: Class 2A, 3A, 6g, 6h, and 4h6h precision threads with superior fatigue resistance.

• Heat Treatment: Full in-house capabilities including solution annealing, aging, precipitation hardening, and stress relieving.

• Surface Finishing: Passivation, electropolishing, black oxide, anodizing (titanium/aluminum), PTFE coating, and specialized anti-galling treatments.

Proprietary & Custom Drive Development:

• Exclusive Drive Systems: We can develop custom, proprietary tamper-resistant drive geometries for your exclusive use.

• Matched Tooling: We provide or specify mating driver bits for your security fasteners.

• Branded Drivers: Custom-identified drivers for authorized personnel only.

Quality Assurance:

• Material Certification: Complete Material Test Reports (MTRs) to EN 10204 3.1/3.2 with full traceability to melt source.

• Dimensional Inspection: CMM, optical comparator, and vision system verification to customer specifications.

• Drive Geometry Verification: 100% optical inspection of tamper-resistant drive recesses.

• Mechanical Testing: Tensile, yield, hardness, torque, and drive tool compatibility testing.

• Process Certification: AS9100, ISO 9001, ISO 13485, ITAR, and NADCAP compliant.

Industry Applications & Recommended Materials

Security Features & Customization Options

Tamper-Evident Features:

• Break-Away Heads: Designed to shear at preset torque, leaving no removal feature.

• Frangible Drive Pins: Center pin shears after installation, preventing driver engagement.

• One-Way Drive: Angled drive slot allows tightening only.

• Tamper-Indicating Coatings: Color-changing or frangible finishes showing evidence of attempted removal.

Environmental Protection:

• Sealed Security Screws: With O-ring, bonded seal, or pre-applied sealant for weather/fluid resistance.

• Corrosion-Resistant Finishes: Custom platings and coatings for extreme environments.

• High-Temperature Capability: Inconel, Nimonic, Waspaloy for exhaust and engine applications.

Access Control:

• Proprietary Drive Systems: Exclusive geometries requiring custom, non-standard drivers.

• Matched Tooling Programs: Drivers supplied only to authorized personnel.

• Keyed Security Fasteners: Multiple key codes within same drive family.

Engineering & Technical Support

Security Consultation:
Our security engineering team provides expert guidance on:

• Threat assessment and security level determination

• Drive system selection based on tamper risk

• Material selection for environmental exposure

• Installation tooling and torque specifications

• Maintenance and replacement protocols

Design Optimization:

• Drive geometry development for proprietary security systems

• Head style optimization for installation clearance

• Thread engagement calculations for load requirements

• Finite element analysis (FEA) for critical security applications

• Prototype development and tamper testing

Documentation & Traceability:

• Full material certification with chemical analysis and mechanical properties

• Lot-specific traceability from raw material to finished product

• First Article Inspection (FAI) per AS9102

• Certificate of Conformance (C of C)

• Tamper-test reports as required

Why Choose RAYCHIN?

• 25+ Years of Exotic Alloy Expertise: Deep metallurgical knowledge across the full spectrum of superalloys and refractory metals.

• Security Fastener Specialists: Dedicated engineering focus on tamper-proof and anti-vandal fastening solutions.

• Complete In-House Processing: From raw material to finished, certified product — no outsourcing.

• Proprietary Drive Capability: We develop and manufacture custom, exclusive drive systems.

• Global Standards Compliance: Products meet ASTM, ASME, DIN, ISO, and MIL-SPEC specifications.

• Rapid Prototyping: Quick-turn samples for design validation and security testing.

• Supply Chain Reliability: Consistent quality, competitive pricing, and on-time delivery to global markets.

Request a Quote for Security Screws

Contact RAYCHIN's security fastening engineering team today with your specifications or CAD drawings. We provide confidential consultation, rapid response, and competitive pricing for standard and custom security screw solutions in advanced alloys.

Email: sales@ray-chin.com
Web:www.ray-chin.com
Response Time: < 24 hours

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