Custom Set Screws & Grub Screws

Small Screw, Specific Job

A set screw (grub screw, if you learned your trade in the UK — same part) does one job: it clamps one component onto another by point pressure, usually a collar, gear, pulley or coupling onto a shaft. Because the whole function lives in the point, the point geometry, length and thread are exactly where standard parts run out: the catalog carries cup point in regular lengths and calls it a day.

We machine the rest — special points, intermediate and extra-long lengths, fine threads, soft tips, left-hand threads and reproductions of set screws that stopped being standard fifty years ago.

Point Styles: What Each One Does

Tell us what the screw bears against and we recommend the point. Or spec it yourself:

Point	Standard	What it does — when to spec it
Cup point	DIN 916 / ISO 4029	The general-purpose choice. The cup rim bites into the shaft for a secure grip. Use on hardened or unhardened shafts where a small mark is acceptable.
Knurled cup	—	Cup point with serrated rim — resists loosening under vibration. Spec for motors, vibratory equipment, anything that hums.
Cone point	DIN 914 / ISO 4027	Highest holding power — seats into a drilled countersink in the shaft. Permanent or semi-permanent locations.
Flat point	DIN 913 / ISO 4026	Bears flat without digging in. Use where the shaft must not be marked, or for frequent adjustment against a flat.
Dog point	DIN 915 / ISO 4028	Cylindrical nose locates into a hole or slot — works as a guide, stop or anti-rotation key. Custom dog diameter and length are our most-requested special.
Soft tip	custom	Brass, nylon or copper insert tip — clamps polished or ground shafts without a mark. Spindles, instrument shafts, plated surfaces.
Special point	your drawing	Oval, half-dog, extended pilot, ball-nose, cross-drilled for wire — if you can sketch it, we can turn it.

What We Make That the Catalog Doesn't

• Intermediate and long lengths — an M8 grub screw 55 mm long, or over 100 mm as a threaded pin; catalog lengths jump in coarse steps
• Fine threads — M10×1, M12×1,25 grub screws for thin-wall hubs and precise adjustment; almost never stocked
• Custom dog points — non-standard dog diameter or length to fit an existing hole or track
• Left-hand threads — for shafts where rotation would back a right-hand screw out
• Brass, titanium and A4 stainless — full grub screw geometry in materials the fastener aisle doesn't carry
• Vintage and imperial oddities — BSW, BSF, UNF and pre-metric machinery threads, reproduced from your sample
• Locking features — nylon patch, knurled rim, cross-drilled for locking wire

Cold-Heading Factory or CNC One-Offs?

Both make set screws; they solve different problems. Being honest about which you need saves you money:

Need 50,000 standard cup points? A heading factory beats us on price and we'll say so. Need one M12×1 dog point 60 mm long in A4 — or 200 of them — that part doesn't exist until someone machines it. That's us.

Materials & Finishes

Material	Use it for
Alloy steel 45H / 14.9	The standard grub screw material — hardened, black oxide finish
Stainless A2 (304)	General corrosion resistance, food and outdoor equipment
Stainless A4 (316)	Marine and chemical environments
Brass	Soft clamping, electrical, non-sparking, decorative
Titanium Grade 5	Weight-critical and non-magnetic assemblies
Nylon / PEEK	Fully non-marring, insulating set screws

Finishes: black oxide, zinc plating, passivation or plain machined. Drives: hex socket (standard), slotted, Torx or square broached on request.

Where Custom Set Screws Show Up

Frequently Asked Questions