Equal Thread Length Rods & Studs Manufacturer
MT.BOLTS manufactures Equal Thread Length Rods and Studs, which are precision-engineered fasteners featuring equal-length threads on both ends, separated by a plain (unthreaded) section in the middle. These components are commonly used in flanged joints, equipment assembly, pipe fittings, and structural connections where consistent load distribution and axial alignment are critical. MT.BOLTS offers a wide range of sizes, materials, and coatings to meet international standards and application-specific requirements.
- System of Measurement
- Metric Sizes: M6 to M64
- Imperial Sizes: 1/4″ to 2.5″
- Overall Length Range:
- Metric: 50 mm to 3000 mm
- Imperial: 2″ to 120″
- Thread Length (each end):
- Typically 2× nominal diameter or custom as specified
- Thread Pitch:
- Metric: Coarse (standard), Fine available
- Imperial: UNC, UNF, 8UN
- Thread Direction:
- Right-hand thread (standard)
- Left-hand thread (optional)
- Stud Types Available
Equal Thread Length Studs – Equal threading on both ends, suitable for symmetrical bolting - Double-End Studs – Threaded at both ends with a plain center
- Tap-End Studs – One end with short thread (for tapped hole) and one with longer nut-end
- Fully Threaded Rods – For continuous engagement applications
Equal Thread Length Rods & Studs Material Types
MT.BOLTS supplies carbon steel, stainless steel, duplex steel, and nickel-based alloy Equal Thread Length Rods & Studs, meeting the demanding requirements of chemical, marine, and high-temperature environments, compliant with various international standards.
| Material Category | Common Grades/Models | Description |
| Carbon Steel | ASTM A307, A325, A490 | High strength and cost-effective, suitable for general structures; requires anti-corrosion coating. |
| Stainless Steel | 304 (A2), 316 (A4), 321, 410 | Excellent corrosion resistance; widely used in food, chemical, and construction industries |
| Duplex Stainless Steel | UNS S31803/S32205 (F51), UNS S32750 (F53) | High strength with superior chloride corrosion resistance; used in seawater, petrochemical, and paper industries |
| Monel Alloys | Monel 400, Monel K500 | Excellent seawater corrosion resistance and mechanical strength; used in marine engineering and pump systems |
| Hastelloy Alloys | Hastelloy C276, C22, B2, X | Excellent resistance to strong acids and oxidizing media; widely used in chemical equipment and flue gas desulfurization |
| Inconel Alloys | Inconel 600, 625, 718 | Resistant to high temperature, pressure, and corrosion; used in heat exchangers, aerospace, and nuclear industries |
| Incoloy Alloys | Incoloy 800, 825, 925 | Ideal for high-temperature acidic environments; widely used in petroleum refining and heat treating systems |
| Nickel Alloys | Nickel 200, 201 | Pure or high-nickel alloys with excellent conductivity and alkali resistance; used in electronics and chemical applications |
Equal Thread Length Rods & Studs System of Measurement
Metric Sizes: M6 – M64
Imperial Sizes: 1/4″ – 2.5″
Length Range:
Metric: 50 mm – 3000 mm
Imperial: 2″ – 120″
Thread Length (Each End):
Typically 2× the nominal diameter
Custom thread lengths available upon request
Thread Pitch:
Metric: Coarse (default), Fine available
Imperial: UNC, UNF, 8UN
Thread Direction:
Right-hand thread (standard)
Left-hand thread available
Equal Thread Length Rods & Studs Common Standards
ASTM A193 / A320 – For alloy and stainless steel stud bolts used in high temperature and pressure applications
ASTM A307 / A449 – General-purpose and high-strength carbon steel studs
DIN 938 / DIN 939 – Metric equal thread length stud bolts
ISO 898-1 – Mechanical properties for carbon/alloy steel fasteners
ASME B18.31.2 / B18.31.3 – Inch series continuous and double-end studs
Custom / OEM Standards – Tailored to customer drawings and specs
Equal Thread Length Rods & Studs Surface Finishes
Plain (Uncoated) – Standard for dry environments
Zinc-Plated (Clear/Yellow) – Basic corrosion protection
Hot-Dip Galvanized – Excellent for outdoor/structural use
Black Oxide – Mild protection, aesthetic finish
Phosphate-Coated – Improved adhesion/lubricity
PTFE/Xylan Coated – Anti-corrosion, anti-galling
Passivated or Electropolished – For stainless steel
Custom Finishes – Available on request
Why Choose MT.BOLTS
- Material Diversity
- Standardized Production
- Ample Inventory
- Competitive Pricing
- Low-MOQ Customization
Benefits and Limitations of Equal Thread Length Rods & Studs
Benefits:
Provides balanced clamping force and load distribution
Simplifies alignment in flanged or bolted joints
Customizable in thread length, diameter, and finish
Compatible with standard nuts, washers, and coatings
Suitable for repeated disassembly or torquing cycles
Limitations:
Not fully threaded – Less flexibility for variable-depth applications
Requires precise length selection for correct clamping
Threads on both ends may be exposed to corrosion or wear
Higher cost compared to plain rods for large quantities
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Equal Thread Length Rods & Studs Applications
Flanged Piping Systems – Used with gaskets, nuts, washers
Heavy Machinery Assembly – Compressors, engines, turbines
Structural Connections – Steel frames, anchor plates
Oil & Gas / Refining – Heat exchangers, pressure vessels
Marine & Offshore Equipment – 316 SS or coated for corrosion
Power Generation & Energy – Boilers, turbines, pipelines
Automotive & Rail – High-load engine and suspension joints
FAQ About Equal Thread Length Rods & Studs
Equal thread studs have two threaded ends and a plain center section, while fully threaded rods are threaded along the entire length.
Yes, MT.BOLTS can produce studs with customer-defined thread lengths, materials (e.g., B7, 316, A2-70), and special finishes.
Yes, both ends or one end can be supplied with left-hand threading upon request.
Choose ASTM A193 Grade B7 or ASTM A320 L7 studs with nuts and washers according to ASME B16.5 / B16.47 flange class.
Yes, MT.BOLTS provides EN 10204 3.1 / 3.2 MTC, and third-party inspection certificates when required.
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