JJ Fastener
PRODUCTHex Socket Countersunk Head Cap Screw DIN 7991 Alloy Steel and Stainless Steel Fastener for Flush Surface Machinery Assembly
Standard:DIN 7991
Material Options:Alloy Steel / Stainless Steel
Strength Grade:Available upon request
DIRECT MILL FASTENER CATALOGUE
Product Top Category 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 35 VERIFIED FASTENER SERIES|Direct Mill Stock
< 15 PPM Optical Sorting GuaranteePRODUCTJJ Fastener
PRODUCTHex Socket Head Cap Screw DIN 912 Alloy Steel 8.8 and 12.9 or Stainless Steel 304 and 316 Fastener for Machinery and Mold Assembly
Strength Grade:8.8/12.9
Standard:DIN 912
Material:Alloy Steel Grade / Stainless Steel
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
JJ Fastener
PRODUCTFull Thread Hex Bolt DIN 933 / ISO 4017 Carbon Steel & Alloy Steel Fastener for Construction and General Industry
Standard:DIN 933 / ISO 4017
Strength Grade:Available upon request
Diameter Range:M2–M42
JJ Fastener
PRODUCTFull Thread Hex Bolt DIN 933 / ISO 4017 Carbon Steel & Alloy Steel Fastener for Construction and General Industry
Grade:Grade 8.8
Material:Carbon Steel
Standard:DIN 933/DIN 931
What Are Industrial Fasteners?
Industrial fasteners are the threaded components — bolts, nuts, screws, studs, threaded rods and anchors — that clamp, join and secure parts in machinery, vehicles, steel structures and buildings. They are specified by standard (DIN, ISO, ASTM, ANSI), material and grade, thread size, length and surface finish, and bought in bulk by distributors, OEM plants and contractors.
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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