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High Strength 12.9 Grade Carbon Steel Extended Length Stud Screw

Place of Origin	GuangDong Dongguan
Brand Name	SITUO
Certification	ISO9001 & TS16949
Model Number	ST-300016

Product Details

Material:

Stainless Steel

Surface Treatment:

Passivation

Precision:

Min0.01

Processing Technology:

CNC Turning

Head Shape:

Hexagonal

Grade:

12.9

Highlight:

12.9 grade carbon steel stud screw

extended length stud screw

high strength CNC screws

Payment & Shipping Terms

Minimum Order Quantity

1PCS

Price

5-10 USD per item

Packaging Details

Communication

Delivery Time

Communication

Payment Terms

T/T

Supply Ability

10000PCS per day

Product Description

High Strength 12.9 Grade Carbon Steel Extended Length Stud Screw

Product Overview

This 12.9 Grade Carbon Steel Extended Length Stud Screw is a high-strength threaded fastener manufactured to industrial ISO and DIN specifications. Constructed from premium carbon steel with professional heat treatment, this extended stud screw delivers stable structural performance and uniform thread precision. Ideal for equipment frame connections and mechanical assemblies requiring reliable fastening solutions.

Core Product Features

Standard 12.9 Grade Heat Treatment

Processed with standardized heat treatment to maintain steady hardness and structural toughness. Provides reliable load-bearing capacity and excellent vibration resistance, reducing fastening loosening during long-term equipment operation.

Precision Rolled Thread

Threads are precisely rolled with complete tooth profiles, uniform pitch, and consistent tolerance. Each product undergoes standard thread gauge inspection to ensure smooth installation and perfect matching with standard nuts and tapped holes.

Extended Length Design

Custom extended length design overcomes installation limitations of standard short screws. Ideal for thick plate connections, multi-layer structural fixing, and special spacing assemblies with flexible locking position adjustment.

Integral Forming & Surface Treatment

One-piece integral processing ensures uniform internal structure without cracks or deformation. Fine surface finishing provides smooth texture without burrs, suitable for both manual and mechanical installation.

Recommended Applications

Engineering machinery and equipment component connection
Thick plate, multi-layer fixture and support installation
Factory equipment maintenance and replacement fasteners

Common Problem Solutions

Problem: Standard short screws cannot meet thick structure installation requirements

Solution: Extended length design adapts to multi-layer and thick-thickness assembly with adjustable locking range.

Problem: Ordinary screws are prone to loosening under mechanical vibration

Solution: 12.9 grade stable material performance improves structural stability for long-term working conditions.

Problem: Irregular threads lead to difficult assembly and poor fitting

Solution: Precision thread rolling and standard gauge inspection ensure consistent matching performance.

Customization & Service

SITUO Hardware provides customized processing for 12.9 grade carbon steel extended stud screws. We support different thread specifications, extended lengths, and surface treatments. All products undergo strict dimension and appearance inspection before delivery, ensuring stable batch quality and flexible customization to meet various industrial assembly and engineering procurement demands.

Manufacturing Capabilities

We utilize advanced equipment and technology from Japan and Germany, including CNC 5-axis and 6-axis machines. Our maximum processing outer diameter is 60mm with minimum control tolerance of 0.001mm. Equipment includes Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment.

Our company employs 300 personnel including 20 technicians, 10 engineers, and 15 quality control specialists. We operate over 300 pieces of equipment and implement 8S management with ISO9001 and TS16949 automotive certifications.

Notable customers include , Foxconn, Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia.

Technical Specifications

Main Products	Stainless steel screws, carbon steel screws, pins, rivets, nuts, eccentric nails, embedded parts, and other fasteners
Business Type	Factory / Manufacturer
Services	CNC Machining, Turning and Milling, CNC Turning, Cold heading, Stamping, Assembly Service
Materials	Aluminum: AL 6061-T6, 6063, 7075-T etc Stainless steel: 303,304,304L,316L,316F,630,410,420,430, etc Steel: 4140, Q235, Q345B,20#,45# 1215,12L14,1144,1006,1008,1010,1015,1018,10B21,1035,1065 etc. Alloy steel: 5140,4135,4140,3435,5120,415,435,440 etc Titanium: TA1,TA2/GR2, TA4/GR5, TC4, TC18 etc Brass: C36000 (HPb62), C37700 (HPb59), C26800 (H68), C22000(H90),C27000,C51900,C11000,C3604,H62,H65 etc Copper, bronze, Magnesium alloy, Delrin, POM, Acrylic, PC, etc.
Finishes	Sandblasting, Anodize color, Blackening, Zinc/Nickel Plating, Polish, Power coating, Passivation PVD, Titanium Plating, Electrogalvanizing, electroplating chromium, electrophoresis, QPQ(Quench-Polish-Quench), Electro Polishing, Chrome Plating, Knurl, Laser etch Logo, etc.
Drawing Format	STEP, STP, GIS, CAD, PDF, DWG, DXF etc or samples
Tolerance	+/-0.01mm ~ +/-0.05mm
Surface Roughness	Ra 0.1~3.2
Inspection	Complete inspection lab with Micrometer, Optical Comparator, Caliper Vernier, CMM, Depth Caliper Vernier, Universal Protractor, Clock Gauge, Internal Centigrade Gauge