A4 Stainless Steel Serrated T-Slot Bolts for Aluminum Profiles are supplied to GN 505.4. The grade provides superior, including marine and chloride environments and is largely non-magnetic; the practical service range is approx. -200 °C to +400 °C, subject to the property class and the joint. Property data, grade comparison and the full size table follow.
Why Choose A4 Stainless Steel for Serrated T-Slot Bolts for Aluminum Profiles
Specified for marine, coastal and chemical applications. For serrated t-slot bolts for aluminum profiles, 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 Serrated T-Slot Bolts for Aluminum Profiles in marine, coastal, swimming-pool or food-processing environments, A4 is the default selection.
Galvanic & Galling Considerations
Two important notes for stainless serrated t-slot bolts for aluminum profiles: (1) stainless can gall on stainless threads under load — use a thread lubricant or anti-galling compound, especially for M6 and below; (2) when joined to aluminum or galvanized steel, stainless can drive galvanic corrosion of the less-noble metal in wet service — isolate with a coating or sleeve where appropriate.
Using Stainless Fasteners in Aluminum
Stainless steel is more noble than aluminum, so with an electrolyte present — rain, condensation, salt spray — the aluminum becomes the anode and corrodes at the joint. Area ratio decides how bad it gets: a small stainless fastener in a large aluminum section is normally acceptable, a large stainless fastener in thin aluminum is not. Where the joint gets wet, isolate the metals with a coated or nylon washer and a sealant, or specify an aluminum or coated fastener instead.
Sizes of Serrated T-Slot Bolts for Aluminum Profiles Available in A4 Stainless Steel
| Size | Slot width · 20 series (mm) | Slot width · 30 series (mm) | Slot width · 40 series (mm) | Slot width · 45 series (mm) | e1 · 20 series (mm) | e1 · 30 series (mm) | e1 · 40 series (mm) | e1 · 45 series (mm) | e2 · 20 series (mm) | e2 · 30 series (mm) | e2 · 40 series (mm) | e2 · 45 series (mm) | h · 20 series (mm) | h · 30 series (mm) | h · 40 series (mm) | h · 45 series (mm) | k · 20 series (mm) | k · 30 series (mm) | k · 40 series (mm) | k · 45 series (mm) | Length range l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M5 | 6 | 6 | 10 | 5 | 3.5 | 10~25 | GN 505.4 | |||||||||||||||
| M6 | 8 | 8 | 15.5 | 7 | 5 | 12~30 | GN 505.4 | |||||||||||||||
| M8 | 8.2 | 8.5 | 8.2 | 8.5 | 18 | 19 | 9.5 | 10 | 5.5 | 5.5 | 16~45 | GN 505.4 |
Dimensions are independent of the material: every size above is available in A4 Stainless Steel.
Custom manufacturing · Made to drawing
Need this bolt in a grade that is not listed?
A4 Stainless Steel is one of the grades the catalog describes. Material and finish are usually what drives a special — a grade the standard part is not stocked in, or a coating chosen against a salt-spray figure instead of a default. Made by cold heading or hot forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
