Dongguan Situo Hardware Products Technology Co., Ltd
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Home> CNC Hardware Parts> M4 Screws Flat Head Multi Step Pin Shaft CNC Machining Small Parts
Product Details
Company Details
Product Specification
Precision
Min0.001
Payment Terms
T/T
Supply Ability
10000PCS per day
Delivery Time
Communication
Packaging Details
Communication
Sample period
10 to 15 days
Material
SUS304 / DIN 2462
Category
Stainless steel Sleeve
Processing technology
CNC turning
Surface treatment
Passivation
head shape
Customized
Brand Name
SITUO
Model Number
ST-00011
Certification
ISO9001 & TS16949
Place of Origin
GuangdongDongguan
High Light
Stainless steel M4 screws flat head
，pin shaft cnc machining small parts
，cnc machining small parts DIN2462
M4 Screws Flat Head Multi Step Pin Shaft CNC Machining Small Parts
Stainless steel flat-head multi-step pin shaft M4 screws CNC machining
Technical Classification System of Machined Threads
Classification by Functional Orientation
Fastening Threads (Basic Type): Triangular thread profile including Metric (M), Whitworth (W), and Unified National (UNC/UNF) standards. Thread angle 55°/60°, pitch diameter tolerance IT8-IT10, pitch accuracy ±0.02mm.Transmission Threads (High-Precision Type): Core types include Trapezoidal (Tr), Buttress (B), and Ball Screw threads. Ball screws feature transmission efficiency ≥90% and positioning accuracy ±0.001mm.Sealing Threads (Leak-Proof Type): 1:16 taper design with BSPP/BSPT (R/Rc) and NPTF standards. Taper tolerance ≤±0.005mm/m, sealing surface roughness Ra≤1.6μm.Special Threads (Customized Type): Including aerospace MJ threads and square threads requiring customized tools and fixtures.
Technical Adaptability of Processing Processes
Processing Process
Core Parameters
Suitable Threads
Advantages
Limitations
Turning
Speed 500-3000rpm, Feed rate 0.1-1.0mm/r
All types (including non-standard)
Flexible, high efficiency for single-piece
High cost for mass production, skill-dependent
Tapping
Bottom hole tolerance
Small-size fastening threads (M1-M20)
High mass production efficiency, compatible with automation
Only for standard threads, easy tool breakage in deep holes
Rolling/Thread Rolling
Rolling force 5-50kN, Preformed diameter tolerance ±0.03mm
Fastening coarse-pitch threads (M3-M30)
Chipless forming, strength increased by 20-30%
Only for ductile materials, poor adaptability to non-standard threads
Thread Grinding
Grinding wheel speed 3000-6000rpm, Grinding allowance 0.05-0.1mm
High-precision transmission/sealing threads
Precision IT4-IT6, excellent surface quality
Long processing cycle, high equipment cost
Core Technical Control Points
Preprocessing Controls
Clamping concentricity ≤0.01mm, use centering fixtures
Match special tools with cutting edge roughness Ra≤0.8μm
Quench and temper hard materials, remove oxide layers from soft materials
Processing Process Controls
Cutting parameters: High speed (500-3000rpm) and low feed rate for soft materials; low speed (300-1000rpm) and medium feed rate for hard materials
Coolant pressure ≥0.3MPa for difficult-to-machine materials
Dimensional monitoring: Inspect pitch diameter, pitch, and thread angle for first article; sample inspection every 50 pieces during mass production
Chip removal and cooling: High-pressure cooling (flow rate ≥10L/min) for internal threads; bottom hole depth of blind holes exceeds effective length by 2-3 times the pitch
Post-Processing and Inspection Controls
Surface treatment: Galvanizing (8-12μm) / nitriding (0.1-0.3mm) for corrosive environments; Teflon coating for high-temperature scenarios
Precision inspection: Use go/no-go gauges for general threads; control cumulative pitch error ≤0.01mm/m for high-precision threads
Fit verification: Pressure test for sealing threads; no jamming and noise ≤75dB during no-load operation for transmission threads
Special Scenario Controls
Thin-walled parts: Rough machining - stress relief - finish machining, reduce feed rate by 30%
Multi-start threads: Lead accuracy ≤0.02mm
Large-size threads (>50mm): Turn-mill composite machining, cutting depth ≤0.2mm per pass
Manufacturing Capabilities
Head Shape Classification
Pan Head, Button Head, Flat Head / Countersunk Head, Oval Countersunk Head, Hex Head, Socket Head Cap Screw, Square Head, Set Screw / Headless Screw, Truss Head, Eye Head, Flange Head, Phillips Pan Head, Phillips Countersunk Head
Processing Techniques
CNC Lathe, Machining Center (MC), Boring Machine, Grinding Machine, Broaching Machine, Hobbing Machine, EDM Sinker Machine, Wire EDM Machine, Forging Press, CNC Punch Press
Surface Treatment Requirements
Surface Cleaning & Finishing, Chemical Conversion Coating, Electrochemical Treatments, Surface Coating, Surface Modification (Heat Treatment/Diffusion), Mechanical Strengthening, and various specialized finishing processes
We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs.
Technical Specifications
Maximum Processing Outer Diameter
60mm
Minimum Control Tolerance
0.001mm
Equipment
Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment
Company Size
300 employees including 20 technicians, 10 engineers, and 15 quality control personnel
Certifications
ISO9001 and TS16949 automotive certifications with 8S management
Major Customers
Foxconn, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, Cater-pillar
Production Capacity
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, Stainless Steel, Steel, Alloy Steel, Titanium, Brass, Copper, Bronze, Magnesium alloy, Engineering Plastics
Finishes
Sandblasting, Anodizing, Plating, Polishing, Powder coating, Passivation, and various specialized surface treatments
Drawing Formats
STEP, STP, GIS, CAD, PDF, DWG, DXF etc or samples
Tolerance
+/-0.01mm ~ +/-0.05mm
Surface Roughness
Ra 0.1~3.2
Inspection Equipment
Complete inspection lab with Micrometer, Optical Comparator, CMM, and various precision measuring instruments
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Seller
Total Annual:
2800000-3500000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
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Reach Us
Dongguan Situo Hardware Products Technology Co., Ltd No. 9, Shi bi One Alley, Zhangmutou Town, Dongguan City, Guangdong Province https://www.cnc-hardwareparts.com/
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