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{"title":"Instrument Equipment Chemical Hardware SS Fixed Shaft Positioning Ball Head Nut","imgUrl":"https:\/\/img.chinax.com\/nimg\/9c\/c4\/60cf3fdc6bcce55ef091de2ac6b3-200x200-1\/instrument_equipment_chemical_hardware_ss_fixed_shaft_positioning_ball_head_nut.jpg","attrs":{"Category":"pin","Surface treatment":"Customized","Sample period":"10 to 15 days","Precision":"Min0.001"}}
{"title":"Aluminum alloy nuts, chemical nuts, and precision hardware parts' CNC turning","imgUrl":"https:\/\/img.chinax.com\/nimg\/38\/ec\/b33b13221732d052a91cbe544caa-200x200-1\/aluminum_alloy_nuts_2c_chemical_nuts_2c_and_precision_hardware_parts_27_cnc_turning_services.jpg","attrs":{"Weight":"Varies by size","head shape":"Customized","packing":"carton","Corrosionresistance":"High"}}
{"title":"Stainless steel hexagonal head screws, chemical screws, cold heading processing","imgUrl":"https:\/\/img.chinax.com\/nimg\/4f\/04\/13a360beb0bf1645213d4751f3a3-200x200-1\/stainless_steel_hexagonal_head_screws_2c_chemical_screws_2c_cold_heading_processing_services.jpg","attrs":{"usage":"machine","Durability":"High","Brand Name":"SITUO","Model Number":"ST-1300010"}}
{"title":"Ball head stainless steel chemical screws, precise M5 screw rod CNC turning","imgUrl":"https:\/\/img.chinax.com\/nimg\/41\/27\/8cebc23572a8973ce9c7a3890c5b-200x200-1\/ball_head_stainless_steel_chemical_screws_2c_precise_m5_screw_rod_cnc_turning_service.jpg","attrs":{"head shape":"Customized","Sample period":"10 to 15 days","Durability":"High","Productname":"Chemical Hardware"}}
{"title":"Lightweght Through Hole Screws Chemical Nuts CNC Turning Service For Precision","imgUrl":"https:\/\/img.chinax.com\/nimg\/46\/aa\/c809ad8182be74ea906a4bd8747b-200x200-1\/lightweght_through_hole_screws_chemical_nuts_cnc_turning_service_for_precision_hardware.jpg","attrs":{"Material":"carbon steel","Surface treatment":"Customized","Corrosionresistance":"High","Sample period":"10 to 15 days"}}
{"title":"1045 Grade Chemical Hardware Nickel Plated Screws And Fittings Pineapple Shaped","imgUrl":"https:\/\/img.chinax.com\/nimg\/88\/62\/c5d65efaaef5efc3ad4ef9994288-200x200-1\/1045_grade_chemical_hardware_nickel_plated_screws_and_fittings_pineapple_shaped.jpg","attrs":{"Weight":"Varies by size","Corrosionresistance":"High","packing":"carton","Surface treatment":"Customized"}}
Common materials: 304 (A2‑70), 316/316L, Duplex 2205, Super Austenitic 254SMO
304: General corrosion resistance for weak corrosive media
316L: Molybdenum‑bearing, excellent pitting and crevice corrosion resistance, ideal for brine, seawater, chemical wastewater
Duplex & super austenitic: For highly corrosive, high‑temperature and high‑pressure environments
Closed dome structure: no exposed threads, prevents medium corrosion and material buildup, easy to clean, meeting chemical hygiene and anti‑corrosion requirements.
Structural & Functional Features
Integrated hexagon and dome: anti‑loosening, dustproof, corrosion‑resistant, neat appearance
Sealing and safety: Used with gaskets for flange sealing; prevents thread galling for easy maintenance
Mechanical performance: High strength after cold heading (A2‑70 / A4‑80), better fatigue resistance than machined parts
Easy installation: Compatible with standard wrenches, suitable for mass assembly and overhaul
Advantages of Cold Heading Forming
High Material Utilization
Cold heading: 90%-95%, minimal scrap
Machining: Only 50%-70%, large chip waste
Significantly reduces material cost for expensive stainless steel
High Production Efficiency
Multi‑station cold headers: 200-500 pcs/min, 20-30 times faster than machining
Near‑net shape: Dome, hexagon and blank formed in one operation, only thread rolling or tapping required later
Improved Mechanical Properties
Continuous metal flow, dense grain structure, work‑hardened
Tensile and yield strength increased by 15%-30%
Longer fatigue life, ideal for high pressure, vibration, alternating loads
High Dimensional Accuracy & Surface Quality
Dimensional precision: IT8-IT10, excellent consistency and interchangeability
Smooth surface: Ra ≤ 1.6 μm, no machining marks, less buildup, easier cleaning, better corrosion resistance
Energy Saving & Environmental Protection
Cold forming at room temperature, no heating needed
Low energy consumption, no oxide scale or fumes, eco‑friendly
Cost Efficiency
Lower unit cost: saves material, labor, energy and secondary processing
Long die life, stable quality, suitable for mass production
Manufacturing Process Comparison
Item
Cold Heading
Machining
Hot Forging
Material Utilization
90%-95%
50%-70%
70%-85%
Efficiency
Very high
Low
Medium
Mechanical Property
Best
Fair
Good
Surface Finish
Smooth
Machined marks
Rough
Energy Consumption
Very low
Medium
High
Application
Mass production, high strength
Small batches, complex shapes
Large parts, rough forming
Summary
Stainless steel dome nuts are critical for anti‑corrosion, sealing and safe fastening in reactors, heat exchangers, towers, pipelines and valves.
Cold heading is the optimal manufacturing process, with outstanding advantages in material utilization, efficiency, strength, precision and cost, fully meeting the chemical industry's demand for high‑volume, high‑performance, reliable and cost‑effective fasteners.
We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs.
Our maximum processing outer diameter is 60, and the minimum control tolerance is 0.001. We have Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment, which can effectively provide customers with the best technical solutions.
Our company has a total of 300 employees, including 20 technicians, 10 engineers, and 15 quality control personnel. We have over 300 pieces of equipment.
Our company implements 8S management and has passed ISO9001 and TS16949 automotive certifications.
Our customers include bo-sch, Foxconn, Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Cater-pillar.
OUR CAPACITY
Main Products
Stainless steel screws, carbon steel screws, pins, rivets, nuts, eccentric nails, embedded parts, and other fasteners
Business Type
Factory / Manufacture
Services
CNC Machining, Turning and Milling, CNC Turning, Cold heading, Stamping, Assembly Service
