Stainless steel socket screws
DIN 912Socket Cap Screws →Cylindrical head, hex socket drive — high tensile.
DIN 7991Socket Countersunk Screws →Flush 90° countersunk head.DIN 7380Socket Button Head Screws →Low domed head for a finished look.DIN 916Socket Set Screws — Cup Point →Grub screw for locating and clamping.DIN 6912Low Head Socket Caps →Reduced head height for tight spaces.ISO 7379Shoulder Screws →Precision-ground shoulder for pivots and bearings.DIN 912Socket Cap Screws — A4 →316 marine-grade socket caps.ASME B18.3UNC Socket Cap Screws →Imperial coarse-thread socket caps.ASME B18.3UNF Socket Cap Screws →Imperial fine-thread socket caps.—BSW Socket Caps →Whitworth socket cap screws.—Imperial Set Screws →Grub screws in imperial threads.Can’t see the imperial thread you need? Ask us — we hold far more than we list.
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Specifying socket screws
Socket screws use an internal hex drive for high torque in confined spaces. PTS stocks the full range — cap, countersunk, button, shoulder and grub — in A2 (304) and A4 (316) stainless, from M1.6 upwards.
Socket cap screws (DIN 912) are the workhorse where a compact head and high clamping force matter; countersunk (DIN 7991) and button (ISO 7380) heads trade strength for flush or low-profile finishes. Grades A2-70 and A4-80 cover most duties — the suffix is the tensile class, so A4-80 gives 316 corrosion resistance at higher strength. Check drive engagement on small sizes: a worn key ruins a stainless socket head quickly.
PTS stocks socket screws from M1.6 up, in A2, A4 and high-strength BUMAX® grades, with 3.1 certification and PMI testing available per batch. Ordered by 4:30pm, dispatched the same day.
Need help specifying? Ask our technical team or browse the Knowledge Hub.