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Material | Steel, Stainless Steel,Plastic etc. |
Model Type | Ball plunger and wrenches/Ball buttons/Press fit plunger/Roller plunger/Spring plunger/Micro spring plunger/Stroke pin/Long sleeve plunger/Indexing plunger/Ball lock pin |
Finish | Zinc plated,Cleaning,Passivated etc. |
Testing Equipment | CMM,Projector,Pull Tester,Automatic Optic Inspector,Projecting apparatus |
Management System | ISO9001:2008 |
Certification | SGS,RoHS,Material Certification,PPAP |
Production Capability | Auto-lathe turning:ODΦ0.5-20mm,Tol.±0.01mm |
CNC lathe turning:ODΦ0.5-250mm,Tol.±0.005mm | |
CNC Milling:800x600mm(LxW),Tol.±0.05mm | |
Grinding:Tol.±0.002mm | |
Screw heading & rolling:Metric 0.8-M6,Unified Imperial#0-1/4'' | |
Stamping:200T max | |
Lead Time | 5-15 working days |
Samples | Welcome |
Delivery term | By DHL,UPS,TNT,FedEx,EMS,By Ocean,By Air |
Warranty | Replacement at all our cost for rejected products |
Product Name: Long Spring Plunger
Features:
1. L selectable long series ball plunger.
2. M3 and M4 have no slit for a wrench on the tip. It can be installed only by using a hex socket.
3. Mini. load is teh initial load, and max. load is the one when the tip is fully compressed.










1. Professional technical team
2. High precision threads
3. Reasonable price
4. Strong production line
5. Sandum will be your reliable partner


Q1:How to guarantee the Quality of Industrial Parts?
A1:We have been in fastener field over ten years with full experience. And there are 5 checks in the whole processing, We have IQC (incoming quality control), IPQCS (in process quality control section), FQC (final quality control) and OQC (out-going quality control) to control each process of industrial parts production.
Q2:Can I get a sample before mass production?
A2: We can provide free sample if we have this in stock, as long as you afford the freight.if no stock, We can produce for you after get sample fee. lead time:5-7 workdays.
Q3:What is the lead time of the mass production?
A3:Normally, 7-15 workdays, it depends on the quantity.
Q4:What's the advantage?
A4: The competitive prices, fast delivery and high quality. responsible-oriented employees strict tolerance, smooth finish and long-life performance.
Q5:What are our machining equipment?
A5:CNC milling machines, CNC turning machines, stamping machines,grinding machines,automatic lathe machines, tapping machines, grinding machines,screw machines, cutting machines and so on.
Q6:Who are our main customers?
A6:BMW,PHILIPS,AIRBUS,ABB,AUDI,TOYOTA,PANASONIC,SONY,BOSCH,HUAWEI,GREE,NEC,SIEMENS,CANON,Wii,SANYO,FOXCONN,SAMSUNG
Q7:Will my drawing be safe after you get it?
A7: Yes, we will not release your design to third party unless with your permission.
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