JJ Fastener
PRODUCTHeavy Hex Structural Bolt ASTM A490 Alloy Steel Fastener for Heavy Steel Construction Bridges and Buildings
Material:Alloy Steel
Standard :Standard Designation
Strength Grade:A490
DIRECT MILL FASTENER CATALOGUE
Hex, Flange & Structural Bolts Manufacturer
JJ Fastener manufactures and supplies complete industrial precision fastening systems — high-tensile structural bolts, hex nuts, machine screws, double-end studs, threaded rods, and foundation anchor bolts. Trusted across civil steel construction, automotive assembly, rail transit, offshore wind farms, and heavy industrial equipment.
MOQ and lead time vary by product and specification. Contact us for your exact requirement.
120,000 MTAnnual Capacity
350+Standards
15 DaysGlobal Dispatch
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5 CategoriesSHOWING 11 VERIFIED FASTENER SERIES|Direct Mill Stock
< 15 PPM Optical Sorting GuaranteePRODUCTJJ Fastener
PRODUCTHeavy Hex Structural Bolt ASTM A325 High Strength Carbon Steel Fastener for Steel Structures Bridges and Industrial Buildings
Standard:ASTM A325
Material:High Strength Carbon Steel
JJ Fastener
PRODUCTHex Bolt IS 1363 Carbon Steel and Stainless Steel Fastener for Machinery Assembly and General Industry
Standard:IS 1363
Material Options:Carbon Steel / Stainless Steel
JJ Fastener
PRODUCTDouble End Stud Bolt ASTM A193 B7 Alloy Steel for Oil Gas Pipeline and Flange Connections
Standard:ASTM A193
Grade:B7
Material:Alloy Steel
JJ Fastener
PRODUCTFull Threaded Rod DIN 975 Alloy Steel A193 B7 and Stainless Steel 304 316 Fastener for Construction and Pipeline Support
Standard:DIN 975
Material Options:A193 B7 / Stainless Steel
Grade :A193 B7
JJ Fastener
PRODUCTHex Cap Screw ASME B18.2.1 UNC/UNF Carbon Steel SAE Grade 2, 5 & 8 Fastener for Automotive and Industrial Machinery
Standard:ASME B18.2.1
Material:Carbon Steel
JJ Fastener
PRODUCTRound Head Square Neck Carriage Bolt DIN 603 Carbon Steel Grade 4.8 Fastener for Wood Construction and Furniture
Standard:DIN 603
Strength grade:Grade 4.8
Material:Carbon steel
JJ Fastener
PRODUCTHex Flange Bolt DIN 6921 Grade 4.8 & 8.8 for Automotive and Agricultural Machinery
Standard:DIN 6921
Strength Grade:Grade 4.8 / Grade 8.8
Material:Carbon Steel
JJ Fastener
PRODUCTPartial Thread Hex Bolt DIN 931 / ISO 4014 Carbon Steel & Alloy Steel Fastener for Structural Connections and Machinery
Standard:DIN 931 / ISO 4014
Material:Carbon Steel / Alloy Steel
Diameter Range:M2–M42
What Are Hex Bolts?
Hex bolts are threaded fasteners with a six-sided head, tightened with a wrench or socket to clamp two or more parts together. They are made to standards such as DIN 931, DIN 933, ISO 4014, ISO 4017 and ASTM A325 in carbon, alloy or stainless steel, and supplied in bulk for steel construction, machinery and automotive assembly.
OEM / ODM DRAWING-TO-PART ENGINEERING
24H DFM FEASIBILITY · LIVE WORKSTATION
Can't find the exact fastener you need?
Send your drawing or sample for custom manufacturing.
We support precision non-standard cold heading, secondary 5-axis CNC machining, customized head stampings, specialized dual threads, and bespoke anti-corrosion platings. Our senior metallurgical engineers conduct Design for Manufacturability (DFM) reviews and return formal quotations within 24 hours.
Fast Tooling3–5 DaysRapid Prototyping
DFM FeedbackWithin 24hFeasibility Study
CAD SupportSTEP / DWG2D/3D Formats
Quality LevelPPAP Level 3CMM & MTR 3.1
lockStrict Mutual NDA Protected
verified PPAP Level 3 Ready
Non-Standard Fasteners100% Optical CMM
Direct metallurgical analysis and stress simulation for extreme duty applications.
MANUFACTURING SPECIFICATIONS
Bulk Fastener Standards & Manufacturing Capabilities
Rigorous quality control systems backed by in-house spark spectrometry, proof-load tensile testers, and 100% optical camera sorting.
verified100% In-Line Optical Inspection (< 15 PPM)
gavel
Core Normative Standards
Full compliance with world industrial standards across dimensional tolerances and thread geometries.
DINISOASTMANSIBS / ENGB
diamond
Prime Raw Materials
Sourced directly from Baosteel & Xingtai Steel with certified spark spectrometer batch heat numbers.
Carbon Steel:Q235, 35K, 45#
Alloy Steel:40Cr, 35CrMo, SCM435
Stainless Steel:AISI 304, 316 (A2/A4)
shield
Anti-Corrosion Finishes
Engineered to withstand heavy cyclic marine humidity and harsh industrial chemical exposures.
Zinc Plating:Cr3+ Clear / Yellow
HDG Galvanized:ASTM A153 1000h+
Dacromet / Geomet:1500h Salt Spray
local_shipping
Supply & Delivery
Dual supply model offering immediate container stock dispatch alongside turnkey OEM tooling fabrication.
Standard Stock:50,000+ SKUs (15d Lead)
Custom Tooling:Samples in 3–5 Days
Export Logistics:FOB, CIF, CFR, DDP
DIRECT MILL EXPORT INQUIRY
Buying in Bulk? Get an Instant Fastener Quote
Submit your required specifications or drawings. Our technical sales engineers respond with competitive tiered pricing within 2 hours.
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