Blue Dyed Jam Nuts | McMaster-Carr

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Thin-Profile Hex Nuts

About half the height of standard-profile nuts, these fit in spaces with low clearance. You can also use them as jam nuts by threading them against another hex nut to hold it in place.

Medium-Strength Steel

These Grade 5 or Class 04 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Blue Dyed Steel—These metric-sized nuts have a distinctive blue color, so you can easily tell them apart from inch nuts.

	Wd., mm	Ht., mm	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Blue Dyed Steel


	M6 × 1 mm	10	3.2	ISO Class 04	DIN 439B, ISO 4035	50	000000000	00000
	M8 × 1.25 mm	13	4	ISO Class 04	DIN 439B, ISO 4035	50	000000000	0000
	M10 × 1.5 mm	17	5	ISO Class 04	DIN 439B, ISO 4035	50	000000000	00000
	M12 × 1.75 mm	19	6	ISO Class 04	DIN 439B, ISO 4035	25	000000000	0000
	M16 × 2 mm	24	8	ISO Class 04	DIN 439B, ISO 4035	10	000000000	0000
	M20 × 2.5 mm	30	10	ISO Class 04	DIN 439B, ISO 4035	10	000000000	00000
	M24 × 3 mm	36	12	ISO Class 04	DIN 439B, ISO 4035	1	000000000	0000