Material page for ball-lock pins (t-handle) in A4 Stainless Steel (ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80). The sizes below are the ones we supply; there is no published dimensional standard for this article, so the table rather than a standard number is what to quote. Corrosion behaviour is superior, including marine and chloride environments and the service range is approx. -200 °C to +400 °C, subject to the property class and the joint.
Why Choose A4 Stainless Steel for Ball-Lock Pins (T-Handle)
Specified for marine, coastal and chemical applications. For ball-lock pins (t-handle), this matters when superior, including marine and chloride environments is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80 |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C, subject to the property class and the joint |
| Corrosion characteristic | Superior, including marine and chloride environments |
Corrosion Behavior in Service
A4 (316) adds 2–3% molybdenum to the A2 (304) composition, which dramatically improves resistance to chloride-pitting corrosion. For Ball-Lock Pins (T-Handle) in marine, coastal, swimming-pool or food-processing environments, A4 is the default selection.
Comparable Grades
For Ball-Lock Pins (T-Handle), the alternative stainless grade is A2 (304). The practical dividing line is chlorides: A2 (304) is fine until salt is involved, and A4 (316) exists for the cases where it is — coastal, marine and road-salt service. Neither reaches the strength of a plated class 8.8 or 10.9 fastener.
Using Stainless Fasteners in Aluminum
Expect the aluminum to corrode, not the fastener — stainless sits higher in the galvanic series, so the aluminum is the one that gives up material. A small fastener in a thick section spreads the loss over a large area and is usually fine; a large fastener in thin sheet concentrates it and is not. Keep water out of the joint, or isolate the two metals with a nylon or coated washer and a sealant.
Sizes of Ball-Lock Pins (T-Handle) Available in A4 Stainless Steel
| Shank diameter d (mm) | Usable length (mm) | Handle | Double shear load (kN) | Balls | Shank tolerance | Material | Finish |
|---|---|---|---|---|---|---|---|
| 5 | 20 | T-handle | 5.5 | 2 | h9 | Stainless 1.4305 | Passivated |
| 6 | 30 | T-handle | 8.0 | 2 | h9 | Stainless 1.4305 | Passivated |
| 8 | 40 | T-handle | 14.5 | 2 | h9 | Stainless 1.4305 | Passivated |
| 10 | 50 | T-handle | 23.0 | 2 | h9 | Stainless 1.4305 | Passivated |
| 12 | 60 | T-handle | 33.0 | 2 | h9 | Stainless 1.4305 | Passivated |
| 16 | 80 | T-handle | 59.0 | 2 | h9 | Stainless 1.4305 | Passivated |
Dimensions are independent of the material: every size above is available in A4 Stainless Steel.
Custom manufacturing · Made to drawing
Need this pin in a grade that is not listed?
A4 Stainless Steel is one of the grades the catalog describes. Diameter, length, tolerance class, hardness and end form are specifiable. Ground diameters are held after heat treatment rather than before. Made by cold heading or turning.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
