M20 Set Screws | McMaster-Carr

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66 Products

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Steel Cup-Tip Set Screws

Made of alloy steel, these screws are strong enough to hold components without wearing down. The tip has thin edges that dig into surfaces for a secure hold. They often lock gears, pulleys, and other transmission components onto shafts.

	Pkg. Qty.		Pkg.
Alloy Steel







	M20 × 2.5 mm

	20	10	Rockwell C45	1	91390A210	00000


	25	10	Rockwell C45	1	91390A213	0000
	30	10	Rockwell C45	1	91390A216	0000
	35	10	Rockwell C45	1	91390A217	0000
	40	10	Rockwell C45	1	91390A219	0000
	45	10	Rockwell C45	1	91390A635	00000
	50	10	Rockwell C45	1	91390A222	0000
	55	10	Rockwell C45	1	91390A636	00000
	60	10	Rockwell C45	1	91390A225	0000
	70	10	Rockwell C45	1	91390A637	00000
	80	10	Rockwell C45	1	91390A638	00000


	90	10	Rockwell C45	1	91390A639	00000
	100	10	Rockwell C45	1	91390A641	00000
	120	10	Rockwell C45	1	91390A642	00000
	200	10	Rockwell C45	1	91390A643	00000




			M20 × 1.5 mm

			20	10	Rockwell C45	1	91390A684	0000


			25	10	Rockwell C45	1	91390A685	00000
			30	10	Rockwell C45	1	91390A686	00000
			35	10	Rockwell C45	1	91390A687	00000
			40	10	Rockwell C45	1	91390A688	00000
			50	10	Rockwell C45	1	91390A689	00000
			60	10	Rockwell C45	1	91390A691	00000

Steel Flat-Tip Set Screws

Spread out holding power and protect surfaces from damage. Unlike cup and cone tip screws, the flat tip on these distributes pressure evenly, reducing marring but not holding as tightly. They're a good choice for repositioning parts frequently on jigs, fixtures, and other applications where the tip presses against a flat surface. Made of alloy steel, these screws are strong enough to hold components without wearing down.

	Pkg. Qty.		Pkg.
Alloy Steel







	M20 × 2.5 mm

	20	10	Rockwell C45	5	93245A679	000000


	25	10	Rockwell C45	1	93245A462	0000
	30	10	Rockwell C45	1	93245A680	0000
	35	10	Rockwell C45	1	93245A463	0000
	40	10	Rockwell C45	1	93245A681	0000
	45	10	Rockwell C45	1	93245A682	0000
	50	10	Rockwell C45	1	93245A683	0000
	60	10	Rockwell C45	1	93245A684	0000
	70	10	Rockwell C45	1	93245A464	00000
	80	10	Rockwell C45	1	93245A685	00000
	90	10	Rockwell C45	1	93245A465	00000


	100	10	Rockwell C45	1	93245A686	00000
	130	10	Rockwell C45	1	93245A466	00000

Steel Extended-Tip Set Screws

Like a dowel pin, the tip slides into mating holes to locate and hold components on shafts, tubing, and other surfaces. Made of alloy steel, these screws are strong enough to hold components without wearing down. Also known as half dog-point set screws.

		Tip, mm
	Lg., mm	Dia.	Lg.	Drive Size, mm	Hardness	Pkg. Qty.		Pkg.
Alloy Steel







				M20 × 2.5 mm

				20	15	5.3	10	Rockwell C45	5	92905A685	000000


				25	15	5.3	10	Rockwell C45	5	92905A686	00000
				30	15	10.36	10	Rockwell C45	1	92905A687	0000
				35	15	10.36	10	Rockwell C45	1	92905A647	0000
				40	15	10.36	10	Rockwell C45	1	92905A688	0000
				45	15	10.36	10	Rockwell C45	1	92905A648	0000
				50	15	10.36	10	Rockwell C45	1	92905A689	0000
				55	15	10.36	10	Rockwell C45	1	92905A649	0000
				60	15	10.36	10	Rockwell C45	1	92905A650	0000
				70	15	10.36	10	Rockwell C45	1	92905A690	0000
				80	15	10.36	10	Rockwell C45	1	92905A691	0000


				90	15	10.36	10	Rockwell C45	1	92905A651	0000
				100	15	10.36	10	Rockwell C45	1	92905A652	0000

Stainless Steel Flat-Tip Set Screws

These corrosion-resistant screws spread out holding power and protect surfaces from damage. Made of stainless steel, they won't rust, but they're not as strong as alloy steel. Unlike cup and cone tips, the flat tip distributes pressure evenly, reducing marring but not holding as tightly. They're a good choice for repositioning parts frequently on jigs, fixtures, and other applications where the tip presses against a flat surface.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel can.

	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	M20 × 2.5 mm

	20	10	Not Rated	1	92605A930	00000


	25	10	Not Rated	1	92605A931	0000
	30	10	Not Rated	1	92605A932	0000
	50	10	Not Rated	1	92605A934	00000
	70	10	Not Rated	1	92605A936	00000

Stainless Steel Cup-Tip Set Screws

These corrosion-resistant cup-tip screws grip parts tightly. Made of stainless steel, they won't rust, but they're not as strong as alloy steel. The tip has thin edges that dig into surfaces for a secure hold. They often lock gears, pulleys, and other transmission components onto shafts.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel can.

	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	M20 × 2.5 mm

	20	10	Not Rated	1	92015A038	00000


	25	10	Not Rated	1	92015A039	0000
	30	10	Not Rated	1	92015A041	0000
	40	10	Not Rated	1	92015A042	00000
	50	10	Not Rated	1	92015A043	00000

Easy-Adjust Steel Ball-Tip Set Screws

Keep pressure consistent on workpieces that aren't fully flat or parallel. A rolling ball on the tip of these screws maintains contact and swivels 360° to make small adjustments without loosening. Made of alloy steel, they are strong enough to hold components without wearing down.

	Ball Movement	Hardness		Each
Alloy Steel







	M20 × 2.5 mm

	44.2	15	10	360° Rotation	Rockwell C39	93339A264	000000


	64.2	15	10	360° Rotation	Rockwell C39	93339A266	00000

External-Square-Drive Steel Extended-Tip Set Screws

Tighten these screws to locate and hold components without worrying about your sockets slipping. Four large, flat sides give you reliable torque but slightly less than external hex drives. Like a dowel pin, the tip slides into mating holes on shafts, tubing, and other surfaces. Made of alloy steel, they're strong enough to hold components without wearing down. Also known as half dog-point set screws.

		Tip, mm		Head, mm
	Lg., mm	Dia.	Lg.	Wd.	Ht.	Hardness	Pkg. Qty.		Pkg.
Alloy Steel







				M20 × 2.5 mm

				60	15	5.3	22	20	Rockwell C23	1	92635A633	000000


				70	15	5.3	22	20	Rockwell C23	1	92635A636	00000
				80	15	5.3	22	20	Rockwell C23	1	92635A639	00000
				100	15	5.3	22	20	Rockwell C23	1	92635A641	00000

Hex-Nose Spring Plungers

A hexagonal nose makes installation and removal a breeze. Use a wrench to tighten the nose for more torque and a better hold compared to other tools. Often used in indexing applications, these spring plungers lock heavy moving parts into place. Their nose is longer than ball-nose spring plungers' to withstand greater side forces without disengaging. It compresses when a part presses against it, and then pops out into deep notches or grooves for a strong hold.

Spring plungers are available with or without a threadlocker. Those with a threadlocker won't wiggle loose from vibration. Spring plungers without a threadlocker are easier to remove.

Steel Nose—The strongest, most wear-resistant noses, these won't deform from stress and vibration. Steel is best for dry environments, however, since moisture will cause it to rust.

		Nose, mm		Nose Force, lbf		Body
	Thread Size	Extended Lg.	Wd.	Extended	Compressed	Material	Lg., mm	Drive Style		Each
Steel Nose



		M20 x 2.5 mm	8	9.5	6.7	37.3	Black-Oxide Steel	44.5	External Hex	3360A84	000000

Hex-Nose Spring Plungers For Ejecting

Punch large parts free from presses or dies with a nose that’s three times longer than others. These spring plungers have a long spring that doesn’t need to compress as far to retract the nose, so it can handle high-speed, repetitive ejecting jobs without wearing down. The nose is also hexagonal—take a wrench to it to install with more torque and a better hold than you could get with other tools.

Steel Nose—The strongest, most wear-resistant noses, these won't deform from stress and vibration. Steel is best for dry environments, however, since moisture will cause it to rust.

		Nose, mm		Nose Force, lbf		Body
	Thread Size	Extended Lg.	Wd.	Extended	Compressed	Material	Lg., mm	Drive Style		Each
Steel Nose



		M20 x 2.5 mm	25.4	9.5	4	35	Black-Oxide Steel	95.3	External Hex	33705A72	000000