Headless Clevis Pins (Plain and with Cotter Pin Holes) manufactured in A4 Stainless Steel (ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80) are dimensioned to ISO 2340. The sections below give the mechanical and physical properties of the grade, its behavior in corrosive and elevated-temperature service, and the full size table.
Why Choose A4 Stainless Steel for Headless Clevis Pins (Plain and with Cotter Pin Holes)
Specified for marine, coastal and chemical applications. For headless clevis pins (plain and with cotter pin holes), 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 Headless Clevis Pins (Plain and with Cotter Pin Holes) in marine, coastal, swimming-pool or food-processing environments, A4 is the default selection.
Comparable Grades
For Headless Clevis Pins (Plain and with Cotter Pin Holes), the alternative stainless grade is A2 (304). Choose A2 (304) for general use and A4 (316) wherever chlorides are present; the molybdenum in A4 is the whole difference. Remember that stainless is the corrosion answer, not the strength answer — for load, look at class 8.8 or 10.9 instead.
Using Stainless Fasteners in Aluminum
The galvanic couple here runs the wrong way: aluminum is the less noble metal, so it corrodes and the fastener does not. What governs the rate is the ratio of areas — a large anode and a small cathode is a tolerable combination, the reverse concentrates the attack into thin material around the hole. An isolating washer plus sealant breaks the circuit; where that is impractical, match the fastener to the substrate.
Sizes of Headless Clevis Pins (Plain and with Cotter Pin Holes) Available in A4 Stainless Steel
| Nominal diameter d (mm) | Type | d_1 (mm) | d_2 (mm) | c (mm) | l_e (mm) | Length range l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|
| 3 mm | Clevis pins without head | 3 | 0.8 | 1 | 1.6 | 6~30 | ISO 2340 |
| 3 mm | Clevis pins without head (with split pin holes) | 3 | 0.8 | 1 | 1.6 | 6~30 | ISO 2340 |
| 4 mm | Clevis pins without head | 4 | 1 | 1 | 2.2 | 8~40 | ISO 2340 |
| 4 mm | Clevis pins without head (with split pin holes) | 4 | 1 | 1 | 2.2 | 8~40 | ISO 2340 |
| 5 mm | Clevis pins without head | 5 | 1.2 | 2 | 2.9 | 10~50 | ISO 2340 |
| 5 mm | Clevis pins without head (with split pin holes) | 5 | 1.2 | 2 | 2.9 | 10~50 | ISO 2340 |
| 6 mm | Clevis pins without head | 6 | 1.6 | 2 | 3.2 | 12~60 | ISO 2340 |
| 6 mm | Clevis pins without head (with split pin holes) | 6 | 1.6 | 2 | 3.2 | 12~60 | ISO 2340 |
| 8 mm | Clevis pins without head | 8 | 2 | 2 | 3.5 | 16~80 | ISO 2340 |
| 8 mm | Clevis pins without head (with split pin holes) | 8 | 2 | 2 | 3.5 | 16~80 | ISO 2340 |
| 10 mm | Clevis pins without head | 10 | 3.2 | 2 | 4.5 | 20~100 | ISO 2340 |
| 10 mm | Clevis pins without head (with split pin holes) | 10 | 3.2 | 2 | 4.5 | 20~100 | ISO 2340 |
| 12 mm | Clevis pins without head | 12 | 3.2 | 3 | 5.5 | 24~120 | ISO 2340 |
| 12 mm | Clevis pins without head (with split pin holes) | 12 | 3.2 | 3 | 5.5 | 24~120 | ISO 2340 |
| 14 mm | Clevis pins without head | 14 | 4 | 3 | 6 | 28~140 | ISO 2340 |
| 14 mm | Clevis pins without head (with split pin holes) | 14 | 4 | 3 | 6 | 28~140 | ISO 2340 |
| 16 mm | Clevis pins without head | 16 | 4 | 3 | 6 | 32~160 | ISO 2340 |
| 16 mm | Clevis pins without head (with split pin holes) | 16 | 4 | 3 | 6 | 32~160 | ISO 2340 |
| 18 mm | Clevis pins without head | 18 | 5 | 3 | 7 | 35~180 | ISO 2340 |
| 18 mm | Clevis pins without head (with split pin holes) | 18 | 5 | 3 | 7 | 35~180 | ISO 2340 |
| 20 mm | Clevis pins without head | 20 | 5 | 4 | 8 | 40~200 | ISO 2340 |
| 20 mm | Clevis pins without head (with split pin holes) | 20 | 5 | 4 | 8 | 40~200 | ISO 2340 |
| 22 mm | Clevis pins without head | 22 | 5 | 4 | 8 | 45~200 | ISO 2340 |
| 22 mm | Clevis pins without head (with split pin holes) | 22 | 5 | 4 | 8 | 45~200 | ISO 2340 |
| 24 mm | Clevis pins without head | 24 | 6.3 | 4 | 9 | 50~200 | ISO 2340 |
| 24 mm | Clevis pins without head (with split pin holes) | 24 | 6.3 | 4 | 9 | 50~200 | ISO 2340 |
| 27 mm | Clevis pins without head | 27 | 6.3 | 4 | 9 | 55~200 | ISO 2340 |
| 27 mm | Clevis pins without head (with split pin holes) | 27 | 6.3 | 4 | 9 | 55~200 | ISO 2340 |
| 30 mm | Clevis pins without head | 30 | 8 | 4 | 10 | 60~200 | ISO 2340 |
| 30 mm | Clevis pins without head (with split pin holes) | 30 | 8 | 4 | 10 | 60~200 | ISO 2340 |
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.
