Machine Screws

Slotted Truss Head Machine Screws in Special Alloys | RAYCHIN Manufacturer

RAYCHIN manufactures precision slotted truss head machine screws in 25+ exotic alloys: 17-4 PH, Inconel 718, Titanium, Hastelloy, Monel, MP35N, A286 & more. ASME B18.6.3, DIN 966, ISO 1580 compliant. Custom OEM screws for electronics, aerospace, marine & medical applications. Global supplier.

Slotted Truss Head Machine Screws: Wide-Bearing, Low-Profile Fastening Solutions

RAYCHIN is a precision manufacturer of slotted truss head machine screws — specialized fasteners characterized by their extra-wide, low-profile domed head and single slot drive. This unique head style provides a larger bearing surface than pan or round head screws, distributing load over a wider area while maintaining a low profile to minimize snagging and interference. These screws are essential in electrical enclosures, appliance manufacturing, marine hardware, automotive interiors, aerospace assemblies, and architectural applications where clamping force, appearance, and safety are equally critical.

We engineer these components from over 25 advanced alloys, ensuring reliable performance in corrosive, high-temperature, and high-stress environments. Our slotted truss head machine screws are manufactured to exacting ASME, DIN, ISO, and JIS standards, with complete material certification and full traceability.

Slotted Truss Head Machine Screw Classifications

1. Standard Slotted Truss Head Machine Screws:

• ASME B18.6.3 Slotted Truss Head Screws: American standard dimensions for general industrial applications.

• DIN 966 Slotted Raised Countersunk Head Screws: Low-profile design with slight dimensional variations for European specifications.

• ISO 1580 Slotted Pan Head Screws: Comparable head style for international metric applications.

• JIS B1111 Slotted Truss Head Screws: Japanese Industrial Standard configurations.

2. Special Application Slotted Truss Head Screws:

• Slotted Truss Head Machine Screws with Shoulder: For alignment and spacing applications in precision assemblies.

• Slotted Truss Head Thread-Forming Screws: For use in plastics, composites, and soft metals.

• Slotted Truss Head Screws with Captive Washer: Integrated washer for enhanced load distribution and vibration resistance.

• Slotted Truss Head Screws with Nylon Patch: Self-locking feature for critical vibration-prone applications.

• Custom Slotted Truss Head Designs: Manufactured to your OEM specifications with unique head diameters, heights, slot dimensions, thread forms, and material grades.

Full Material Portfolio with International Standard Designations

We produce slotted truss head machine 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 — Available in H900, H1025, H1150 tempers. Excellent combination of high strength and corrosion resistance.

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

2. Nickel-Based Superalloys:

Inconel® Alloys:

• Inconel 600 (UNS N06600): ASTM B166, AMS 5665 — General purpose high-temperature alloy with oxidation and corrosion resistance.

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

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

Monel® Alloys:

• Monel 400 (UNS N04400): ASTM B164, AMS 4675 — Superior resistance to seawater and steam at elevated temperatures.

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

Hastelloy® Alloys:

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

• Hastelloy C22 (UNS N06022): ASTM B574, AMS 5755 — Superior resistance to oxidizing media and localized corrosion.

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

Incoloy® Alloys:

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

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

High-Temperature Alloys:

• Waspaloy (UNS N07001): AMS 5708, AMS 5824 — Precipitation-hardenable alloy for jet engine and gas turbine applications.

• 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.

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.

• 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.

4. Titanium Alloys:

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

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

• Grade 7 Titanium (UNS R52400): ASTM B348 — Superior corrosion resistance with palladium addition.

5. Refractory & Exotic Metals:

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

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

• Molybdenum (UNS R03600): ASTM B387 — High temperature strength and stiffness for extreme thermal applications.

• Tungsten: ASTM B777 — Highest density and melting point for specialized radiation shielding and high-temperature fasteners.

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 with good corrosion properties.

• 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.

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

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

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.

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

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 for aerospace applications.

• A286 (UNS S66286): AMS 5731, ASTM A453 Grade 660 — Iron-based superalloy with excellent high-temperature strength and oxidation resistance.

9. Pure Nickel:

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

Custom Slotted Truss Head Machine Screw Manufacturing & Quality Assurance

RAYCHIN provides complete custom slotted truss head machine screw manufacturing services tailored to your exact specifications:

Manufacturing Capabilities:

• Precision Machining: Swiss-style CNC turning and milling for complex geometries and tight tolerances (±0.025mm).

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

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

• Secondary Operations: Slotting, drilling, tapping, knurling, and broaching.

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

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

Quality Assurance:

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

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

• Mechanical Testing: Tensile, yield, hardness, and torque testing as required.

• Non-Destructive Testing: Liquid penetrant, magnetic particle, and ultrasonic inspection.

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

Industry Applications

• Aerospace & Defense: Avionics mounting, interior panels, control systems, and instrumentation requiring lightweight, high-strength materials like Titanium Grade 5, A286, and Aluminum 7075.

• Medical & Surgical: Diagnostic equipment, surgical instruments, and implantable devices requiring biocompatible materials such as MP35N, Titanium Grade 2/5, and 17-4 PH.

• Marine & Offshore: Deck hardware, electrical enclosures, and navigation equipment requiring superior corrosion resistance from Monel 400, Duplex 2205, and AL-6XN.

• Chemical Processing: Pump and valve assemblies, reactor components, and instrumentation requiring exceptional chemical resistance from Hastelloy C276, Alloy 20, and Tantalum.

• Electronics & Semiconductor: Equipment enclosures, chassis mounting, and sensitive instrumentation requiring non-magnetic properties from Nitronic 50/60 and Inconel 718.

• Automotive & Transportation: Interior trim, lighting assemblies, and electronic control units requiring corrosion resistance and aesthetic finish.

Why Choose RAYCHIN?

• 25+ Years of Material Expertise: Deep metallurgical knowledge across the full spectrum of exotic alloys and superalloys.

• Engineering Support: Complete design assistance, material selection guidance, and prototyping services.

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

• Complete Traceability: From raw material melt source to finished product certification.

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

Request a Quote for Slotted Truss Head Machine Screws

Contact RAYCHIN's engineering team today with your specifications or CAD drawings. We provide rapid response, technical consultation, and competitive pricing for standard and custom slotted truss head machine screw solutions.

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