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{"title":"High Strength Rail Stud Bolt Double End Threaded DIN 975 976 Grade 8.8 10.9 12.9","imgUrl":"https:\/\/img.chinax.com\/nimg\/84\/a4\/d844190eff7e653d28651676efe9-200x200-1\/high_strength_rail_stud_bolt_double_end_threaded_din_975_976_grade_8_8_10_9_12_9.jpg","attrs":{"Grade":"4.6\/4.8\/5.6\/5.8\/6.8\/8.8\/10.9\/12.9","Brand Name":"Sudelan","Diameter":"20-30mm","Weight per piece":"0.43 kg"}}
{"title":"Black Oxide Hex Head Rail Track Bolt Grade 8.8 Grade 10.9 Nut And Washer Set","imgUrl":"https:\/\/img.chinax.com\/nimg\/d1\/c4\/b369634f2bc215a1d2c6ecb21157-200x200-1\/black_oxide_hex_head_rail_track_bolt_grade_8_8_grade_10_9_nut_and_washer_set.jpg","attrs":{"Head type":"Hex Head","Minimum Order Quantity":"5000","Grade":"4.6\/4.8\/5.6\/5.8\/6.8\/8.8\/10.9\/12.9","Certification":"ISO9001"}}
{"title":"22x186 High Strength Rail T Bolt DIN Standard T Head Bolt For Railway Constructi","imgUrl":"https:\/\/img.chinax.com\/nimg\/84\/93\/9323fd0a8b4e50e45b76d2931ffa-200x200-1\/22x186_high_strength_rail_t_bolt_din_standard_t_head_bolt_for_railway_construction.jpg","attrs":{"Payment Terms":"L\/C,D\/A,D\/P,T\/T","Brand Name":"Sudelan","Model Number":"Hex Head Bolt","Diameter":"22mm"}}
{"title":"Black Round Headed Rail Track Bolt Fish Bolt For Joint Bar P43 P50 P65 P75 Steel","imgUrl":"https:\/\/img.chinax.com\/nimg\/76\/a0\/9fa6b98b5b460b9a5af6e330714a-200x200-1\/black_round_headed_rail_track_bolt_fish_bolt_for_joint_bar_p43_p50_p65_p75_steel_40cr_45_23.jpg","attrs":{"Supply Ability":"30000 per Day","Tensile strength":"800-1000 MPa","Payment Terms":"L\/C,D\/A,D\/P,T\/T","Minimum Order Quantity":"5000"}}
{"title":"Galvanized Rail T Bolt With Nut And Washer , Anti Rust Railway T Head Bolt","imgUrl":"https:\/\/img.chinax.com\/nimg\/bc\/b0\/57eadaa1136f9a934ef079178db4-200x200-1\/galvanized_rail_t_bolt_with_nut_and_washer_2c_anti_rust_railway_t_head_bolt_assembly.jpg","attrs":{"Supply Ability":"30000 Pics per Day","Brand Name":"Sudelan","Diameter":"20-30mm","Length":"50-200mm"}}
{"title":"Black Oxide Rail Hex Head Bolt High Strength Steel Blackened Railway Hex Bolt","imgUrl":"https:\/\/img.chinax.com\/nimg\/86\/10\/983d6c05e49cc74b7d5642fcbadd-200x200-1\/black_oxide_rail_hex_head_bolt_high_strength_steel_blackened_railway_hex_bolt.jpg","attrs":{"Headtype":"Square Head","Thread type":"Partial Thread","Length":"100-300 mm","Minimum Order Quantity":"5000"}}
{"title":"Square Head Fishbolt For Railway Fastening System , Grade 8.8 10.9 Rail Joint","imgUrl":"https:\/\/img.chinax.com\/nimg\/f3\/62\/776c0840f7ec683ab5d176eb9b20-200x200-1\/square_head_fishbolt_for_railway_fastening_system_2c_grade_8_8_10_9_rail_joint_bolt.jpg","attrs":{"Payment Terms":"L\/C,D\/A,D\/P,T\/T","Certification":"ISO9001","Strength Grade":"4.6\/4.8\/5.6\/5.8\/6.8\/8.8\/10.9\/12.9","Brand Name":"Sudelan"}}
Our high-strength stud bolt (double-end threaded) is a headless fastener featuring precision threads on both ends and an optional unthreaded shank. Engineered for heavy-duty industrial connections, it replaces standard bolts in scenarios requiring extreme tensile strength, frequent disassembly, or thick-joint fastening. Made from premium carbon/alloy steel and heat-treated to Grade 8.8/10.9/12.9, it delivers exceptional durability, vibration resistance, and load distribution. Suitable for flanges, pressure vessels, and structural steel, our stud bolts meet DIN 975/976, ASTM A193, and ISO 898-1 standards, ensuring reliable performance in critical applications.
Problem
Traditional hex bolts often fail in heavy-load scenarios: insufficient tensile strength leads to bending under pressure; single-sided threading causes uneven load distribution and loosening from vibration; frequent disassembly wears bolt heads and threads, increasing replacement costs. Additionally, standard bolts cannot accommodate extra-thick joints or blind holes, limiting their utility in construction, oil & gas, and large machinery. These issues result in unsafe connections, unplanned downtime, and high maintenance expenses.
Solution
Our double-end stud bolt solves these problems with a robust, headless design: dual-end threads enable balanced load distribution and secure fastening from both sides; high-grade steel (8.8-12.9) provides 800-1220 MPa tensile strength for heavy loads; precision-machined threads (Class 6g) ensure smooth nut engagement and reusability; optional black oxide/zinc/HDG finishes resist corrosion in harsh environments. By eliminating bolt-head stress and enabling easy disassembly, our stud bolt reduces maintenance costs, enhances safety, and extends service life—ideal for critical, high-stress connections.
Oil & Gas: Flange connections, pressure vessels, pipeline systems (high-pressure/high-temperature)
Construction & Steel Structures: Bridge supports, column connections, heavy machinery assembly
Power Generation: Wind turbines, boiler components, heat exchangers
Automotive & Heavy Equipment: Engine mounts, chassis connections, mining machinery
Marine & Coastal: Shipbuilding, dock infrastructure (HDG/stainless steel finishes)
General Industry: Large equipment assembly, blind-hole connections, frequent maintenance parts
How It Works
Design Structure: A cylindrical steel rod with precision external threads on both ends (full or partial) and a smooth middle shank (for partial thread types).
Installation Process:
One end is screwed into a pre-tapped internal thread hole (e.g., in a machine housing or thick steel plate)
The other end passes through the hole of the mating part
Nuts and washers are tightened on both ends to create a strong, clamping force
Working Principle: Dual-end threads distribute tension evenly across the joint, preventing loosening under vibration or dynamic loads. The headless design eliminates stress concentration at the bolt head, while high-grade steel resists deformation under heavy loads.
How To Choose
1. Determine Load Grade:
8.8 Grade: Medium load, general machinery, indoor use
10.9 Grade: Heavy load, structural steel, automotive, outdoor use
Carbon Steel (C45): Low cost, general use, black oxide finish
Alloy Steel (42CrMo): High strength, heat resistance, for oil & gas
Zinc/HDG Finish: Corrosion resistance for outdoor/coastal environments
3. Confirm Size & Length:
Thread Size: Match nut/hole size (M6-M64 metric)
Length: Calculate total thickness of connected parts + 2*nut height + 5-10mm (spare thread)
4. Thread Type:
Fully Threaded: Adjustable clamping length, general applications
Partial Thread: Unthreaded shank for precise alignment, high-precision machinery
Frequently Asked Questions
Q1: What's the difference between a stud bolt and a regular hex bolt?
A1: Stud bolts have no head and are threaded on both ends, enabling dual-sided fastening and even load distribution. They suit thick joints, blind holes, and frequent disassembly. Hex bolts have a head for single-sided tightening and are limited to standard, accessible joints.
Q2: Are your stud bolts compatible with standard nuts and washers?
A2: Yes. Our stud bolts follow DIN 934 (nuts) and DIN 125 (washers) standards, ensuring perfect compatibility with standard heavy hex nuts and flat washers. Custom nuts/washer sets are available upon request.
Q3: Can I use stud bolts in high-temperature or corrosive environments?
A3: Absolutely. For high-temperature applications (up to 550°C), choose Alloy Steel B7/L7 grades. For corrosive environments (coastal/chemical), select zinc-plated, HDG, or 304/316 stainless steel finishes.
Q4: Do you offer custom lengths or non-standard thread sizes?
A4: Yes. We provide full OEM/ODM support for custom lengths (20mm-1000mm), thread pitches (coarse/fine), and special materials. Submit your drawings or specs for a quote.
Q5: What quality certifications do your stud bolts have?
A5: Our stud bolts are ISO 9001, SGS, and RoHS certified. Each batch undergoes strict quality control: raw material testing, heat treatment verification, 100% dimensional inspection, and load testing. Test reports are available upon request.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Seller
Year Established:
2011
Total Annual:
50000000-100000000
Employee Number:
80~100
Ecer Certification：
Verified Supplier
Suzhou Sudelan Railway Parts Co., Ltd. is a professional manufacturer specializing in railway fastening system components. With a strong focus on quality, reliability, and technical expertise, the company is committed to providing high-performance products for railway infrastructure projects worldwi... Suzhou Sudelan Railway Parts Co., Ltd. is a professional manufacturer specializing in railway fastening system components. With a strong focus on quality, reliability, and technical expertise, the company is committed to providing high-performance products for railway infrastructure projects worldwi...
