Metric Carriage Bolts | McMaster-Carr

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108 Products

Medium-Strength Metric Class 8.8 Steel Square-Neck Carriage Bolts


Fully Threaded	Partially Threaded

These Class 8.8 steel bolts are suitable for fastening most machinery and equipment. A square neck keeps them from turning when tightening a nut. A smooth, rounded head provides a finished look. Length is measured from under the head.

Zinc Plated—Zinc-plated steel bolts resist corrosion in wet environments.

Zinc Yellow-Chromate Plated—Zinc yellow-chromate plated steel bolts resist corrosion in wet environments.

					Head, mm		Neck, mm
	Lg., mm	Threading	Min. Thread Lg., mm	Thread Spacing	Dia.	Ht.	Wd.	Lg.	Tensile Strength, psi	Specs. Met	Pkg. Qty.		Pkg.
Class 8.8 Steel







				M8 × 1.25 mm

				20	Fully Threaded	—	Coarse	18	4.8	8.58	3	110,000	ASME B18.5, ISO 8678	50	98930A216	00000


				25	Fully Threaded	—	Coarse	18	4.8	8.58	3	110,000	ASME B18.5, ISO 8678	25	98930A317	0000
				30	Fully Threaded	—	Coarse	18	4.8	8.58	3	110,000	ASME B18.5, ISO 8678	25	98930A218	0000




						M10 × 1.5 mm

						25	Fully Threaded	—	Coarse	22.3	5.8	10.58	4	110,000	ASME B18.5, ISO 8678	25	98930A319	0000




								M12 × 1.75 mm

								30	Fully Threaded	—	Coarse	26.6	6.8	12.7	4	110,000	ASME B18.5, ISO 8678	10	98930A220	0000




										M16 × 2 mm

										60	Fully Threaded	—	Coarse	35	8.9	16.7	5	120,000	ASME B18.5, ISO 8678	1	98930A321	0000


										100	Partially Threaded	38	Coarse	35	8.9	16.7	5	120,000	ASME B18.5, ISO 8678	1	98930A222	0000




												M20 × 2.5 mm

												60	Fully Threaded	—	Coarse	43	10.9	20.84	5	120,000	ASME B18.5, ISO 8678	1	98930A323	0000


												Zinc-Plated Class 8.8 Steel







																M6 × 1 mm

																12	Fully Threaded	—	Coarse	16.55	3.88	6.48	4.6	110,000	DIN 603	25	98930A020	0000


																16	Fully Threaded	—	Coarse	16.55	3.88	6.48	4.6	110,000	DIN 603	25	98930A024	0000
																20	Fully Threaded	—	Coarse	16.55	3.88	6.48	4.6	110,000	DIN 603	25	98930A026	0000
																25	Fully Threaded	—	Coarse	16.55	3.88	6.48	4.6	110,000	DIN 603	25	98930A032	0000
																30	Partially Threaded	18	Coarse	16.55	3.88	6.48	4.6	110,000	DIN 603	25	98930A038	00000
35																Partially Threaded	18	Coarse	16.55	3.88	6.48	4.6	110,000	DIN 603	25	98930A042	00000
40	Partially Threaded															18	Coarse	16.55	3.88	6.48	4.6	110,000	DIN 603	25	98930A048	00000


Zinc-Yellow-Chromate-Plated Class 8.8 Steel







																M6 × 1 mm

																50	Fully Threaded	—	Coarse	14.2	3.6	6.48	3	110,000	ASME B18.5, ISO 8678	25	98930A201	00000


				70												Partially Threaded	18	Coarse	14.2	3.6	6.48	3	110,000	ASME B18.5, ISO 8678	25	98930A202	00000




																M8 × 1.25 mm

						16										Fully Threaded	—	Coarse	18	4.8	8.58	3	110,000	ISO 8678	100	98930A114	00000


						20	Fully Threaded									—	Coarse	18	4.8	8.58	3	110,000	ISO 8678	100	98930A116	00000
						25	Fully Threaded									—	Coarse	18	4.8	8.58	3	110,000	ISO 8678	50	98930A118	00000
						30	Fully Threaded									—	Coarse	18	4.8	8.58	3	110,000	ISO 8678	50	98930A122	00000
						35	Fully Threaded									—	Coarse	18	4.8	8.58	3	110,000	ISO 8678	50	98930A124	00000
						40	Fully Threaded	—								Coarse	18	4.8	8.58	3	110,000	ISO 8678	50	98930A126	00000
						45	Fully Threaded	—	Coarse							18	4.8	8.58	3	110,000	ISO 8678	50	98930A128	00000
						50	Fully Threaded	—	Coarse							18	4.8	8.58	3	110,000	ISO 8678	50	98930A132	00000
						55	Partially Threaded	22	Coarse							18	4.8	8.58	3	110,000	ISO 8678	25	98930A134	00000
						60	Partially Threaded	22	Coarse							18	4.8	8.58	3	110,000	ISO 8678	25	98930A136	00000
						80	Partially Threaded	22	Coarse							18	4.8	8.58	3	110,000	ISO 8678	25	98930A142	00000


						90	Partially Threaded	22	Coarse							18	4.8	8.58	3	110,000	ISO 8678	25	98930A144	00000




								M10 × 1.5 mm

								20	Fully Threaded	—	Coarse					22.3	5.8	10.58	4	110,000	ISO 8678	50	98930A211	00000


								25	Fully Threaded	—	Coarse					22.3	5.8	10.58	4	110,000	ISO 8678	25	98930A213	00000
								30	Partially Threaded	26	Coarse	22.3				5.8	10.58	4	110,000	ASME B18.5, ISO 8678	25	98930A203	00000
								35	Fully Threaded	—	Coarse	22.3	5.8			10.58	4	110,000	ISO 8678	25	98930A217	00000
								40	Fully Threaded	—	Coarse	22.3	5.8			10.58	4	110,000	ISO 8678	25	98930A219	00000
								45	Fully Threaded	—	Coarse	22.3	5.8			10.58	4	110,000	ISO 8678	25	98930A221	00000
								50	Fully Threaded	—	Coarse	22.3	5.8	10.58		4	110,000	ISO 8678	25	98930A223	00000
								60	Partially Threaded	26	Coarse	22.3	5.8	10.58	4	110,000	ISO 8678	10	98930A227	0000
								70	Partially Threaded	26	Coarse	22.3	5.8	10.58	4	110,000	ISO 8678	10	98930A229	0000
								80	Partially Threaded	26	Coarse	22.3	5.8	10.58	4	110,000	ISO 8678	10	98930A231	0000
								90	Partially Threaded	26	Coarse	22.3	5.8	10.58	4	110,000	ISO 8678	10	98930A233	00000


								100	Partially Threaded	26	Coarse	22.3	5.8	10.58	4	110,000	ASME B18.5, ISO 8678	10	98930A204	00000




										M12 × 1.75 mm

										25	Fully Threaded	—	Coarse	26.6	6.8	12.7	4	110,000	ASME B18.5, ISO 8678	25	98930A205	00000


30	Fully Threaded									—	Coarse	26.6	6.8	12.7	4	110,000	ISO 8678	25	98930A326	00000
35	Fully Threaded									—	Coarse	26.6	6.8	12.7	4	110,000	ASME B18.5, ISO 8678	25	98930A206	00000
40	Fully Threaded									—	Coarse	26.6	6.8	12.7	4	110,000	ISO 8678	25	98930A332	00000
45	Fully Threaded	—								Coarse	26.6	6.8	12.7	4	110,000	ISO 8678	25	98930A334	00000
50	Fully Threaded	—	Coarse							26.6	6.8	12.7	4	110,000	ISO 8678	25	98930A336	00000
55	Partially Threaded	30	Coarse							26.6	6.8	12.7	4	110,000	ASME B18.5, ISO 8678	10	98930A207	0000
60	Partially Threaded	30	Coarse							26.6	6.8	12.7	4	110,000	ISO 8678	10	98930A342	0000
70	Partially Threaded	30	Coarse							26.6	6.8	12.7	4	110,000	ASME B18.5, ISO 8678	5	98930A208	0000




		M16 × 2 mm

		40	Fully Threaded	—						Coarse	35	8.9	16.7	5	120,000	ASME B18.5, ISO 8678	5	98930A209	0000


		45	Fully Threaded	—	Coarse					35	8.9	16.7	5	120,000	ASME B18.5, ISO 8678	5	98930A210	0000
		50	Fully Threaded	—	Coarse					35	8.9	16.7	5	120,000	ASME B18.5, ISO 8678	5	98930A311	00000
		60	Fully Threaded	—	Coarse					35	8.9	16.7	5	120,000	ASME B18.5, ISO 8678	1	98930A212	0000
		70	Partially Threaded	38	Coarse					35	8.9	16.7	5	120,000	ASME B18.5, ISO 8678	1	98930A313	0000
		80	Partially Threaded	38	Coarse					35	8.9	16.7	5	120,000	ASME B18.5, ISO 8678	1	98930A214	0000
		100	Partially Threaded	38	Coarse					35	8.9	16.7	5	120,000	ASME B18.5, ISO 8678	1	98930A215	0000

18-8 Stainless Steel Square-Neck Carriage Bolts


	Fully Threaded

Made from 18-8 stainless steel, these bolts have good chemical resistance and may be mildly magnetic. They're a good choice for ACQ-treated (arsenic-free) lumber. A square neck keeps them from turning when tightening a nut. A smooth, rounded head provides a finished look. Length is measured from under the head. Dimensions meet ASME B18.5 or DIN 603 specifications. Some also meet ISO 8678. DIN 603 is functionally equivalent to ISO 8678 with slight differences in head diameter, head height, and length tolerances.

Match the thread spacing of mating components.

Coarse Thread—Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch.

				Head, mm		Neck, mm
	Lg., mm	Threading	Thread Spacing	Dia.	Ht.	Wd.	Lg.	Tensile Strength, psi	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				M5 × 0.8 mm

				10	Fully Threaded	Coarse	13.55	3.3	5.48	4.1	70,000	DIN 603	50	97248A411	00000


				12	Fully Threaded	Coarse	13.55	3.3	5.48	4.1	70,000	DIN 603	25	97248A412	0000
				16	Fully Threaded	Coarse	13.55	3.3	5.48	4.1	70,000	DIN 603	25	97248A413	0000
				20	Fully Threaded	Coarse	13.55	3.3	5.48	4.1	70,000	DIN 603	25	97248A414	0000
				25	Fully Threaded	Coarse	13.55	3.3	5.48	4.1	70,000	DIN 603	25	97248A415	0000
				30	Fully Threaded	Coarse	13.55	3.3	5.48	4.1	70,000	DIN 603	25	97248A416	0000
				35	Fully Threaded	Coarse	13.55	3.3	5.48	4.1	70,000	DIN 603	10	97248A417	0000




						M6 × 1 mm

						12	Fully Threaded	Coarse	16.55	3.8	6.48	4.6	70,000	DIN 603, ISO 8678	50	97248A311	00000


						16	Fully Threaded	Coarse	16.55	3.8	6.48	4.6	70,000	DIN 603, ISO 8678	50	97248A312	00000
						20	Fully Threaded	Coarse	16.55	3.8	6.48	4.6	70,000	DIN 603, ISO 8678	50	97248A313	00000
						25	Fully Threaded	Coarse	16.55	3.8	6.48	4.6	70,000	DIN 603, ISO 8678	50	97248A314	00000
						30	Fully Threaded	Coarse	16.55	3.8	6.48	4.6	70,000	DIN 603, ISO 8678	50	97248A315	00000
						40	Fully Threaded	Coarse	16.55	3.8	6.48	4.6	70,000	DIN 603, ISO 8678	25	97248A316	0000




								M8 × 1.25 mm

								16	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603, ISO 8678	25	97248A317	00000


								20	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603, ISO 8678	25	97248A318	00000
								25	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603, ISO 8678	25	97248A319	00000
								30	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603, ISO 8678	25	97248A321	00000
								35	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603, ISO 8678	25	97248A322	00000
								40	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603, ISO 8678	10	97248A323	0000
								50	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603, ISO 8678	10	97248A324	0000




										M10 × 1.5 mm

										20	Fully Threaded	Coarse	24.65	5.38	10.58	6.6	70,000	DIN 603, ISO 8678	10	97248A325	0000


										25	Fully Threaded	Coarse	24.65	5.38	10.58	6.6	70,000	DIN 603, ISO 8678	10	97248A326	0000
										30	Fully Threaded	Coarse	24.65	5.38	10.58	6.6	70,000	DIN 603, ISO 8678	10	97248A327	0000
										35	Fully Threaded	Coarse	24.65	5.38	10.58	6.6	70,000	DIN 603, ISO 8678	10	97248A328	00000
										40	Fully Threaded	Coarse	24.65	5.38	10.58	6.6	70,000	DIN 603, ISO 8678	10	97248A329	00000




M12 × 1.75 mm

25	Fully Threaded											Coarse	30.65	6.95	12.7	8.7	70,000	DIN 603	5	97248A418	0000


30	Fully Threaded											Coarse	30.65	6.95	12.7	8.7	70,000	DIN 603	5	97248A419	0000
35	Fully Threaded	Coarse										30.65	6.95	12.7	8.7	70,000	DIN 603	5	97248A421	0000
40	Fully Threaded	Coarse	30.65									6.95	12.7	8.7	70,000	DIN 603	5	97248A422	0000
50	Fully Threaded	Coarse	30.65									6.95	12.7	8.7	70,000	DIN 603	1	97248A423	0000
60	Fully Threaded	Coarse	30.65									6.95	12.7	8.7	70,000	DIN 603	1	97248A424	0000
80	Fully Threaded	Coarse	30.65									6.95	12.7	8.7	70,000	DIN 603	1	97248A425	0000




		M16 × 2 mm

		40	Fully Threaded									Coarse	38.8	8.95	16.7	12.9	70,000	DIN 603	1	97248A426	0000


		50	Fully Threaded									Coarse	38.8	8.95	16.7	12.9	70,000	DIN 603	1	97248A427	0000
		60	Fully Threaded									Coarse	38.8	8.95	16.7	12.9	70,000	DIN 603	1	97248A428	0000
		80	Fully Threaded	Coarse								38.8	8.95	16.7	12.9	70,000	DIN 603	1	97248A429	0000

Highly Corrosion-Resistant 316 Stainless Steel Square-Neck Carriage Bolts


	Fully Threaded

More corrosion resistant than 18-8 stainless steel bolts, these 316 stainless steel bolts have excellent resistance to chemicals and salt water and are a good choice for ACQ-treated (arsenic-free) lumber. They may be mildly magnetic. A square neck keeps them from turning when tightening a nut. A smooth, rounded head provides a finished look. Dimensions meet ASME B18.5 or DIN 603 specifications. Length is measured from under the head.

				Head, mm		Neck, mm
	Lg., mm	Threading	Thread Spacing	Dia.	Ht.	Wd.	Lg.	Tensile Strength, psi	Specs. Met	Pkg. Qty.		Pkg.
316 Stainless Steel







				M6 × 1 mm

				20	Fully Threaded	Coarse	16.55	3.8	6.48	4.6	70,000	DIN 603	10	93180A911	00000


				25	Fully Threaded	Coarse	16.55	3.8	6.48	4.6	70,000	DIN 603	10	93180A912	0000
				30	Fully Threaded	Coarse	16.55	3.8	6.48	4.6	70,000	DIN 603	10	93180A913	0000
				40	Fully Threaded	Coarse	16.55	3.8	6.48	4.6	70,000	DIN 603	10	93180A914	0000
				50	Fully Threaded	Coarse	16.55	3.8	6.48	4.6	70,000	DIN 603	10	93180A915	0000




						M8 × 1.25 mm

						20	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603	10	93180A916	00000


						25	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603	10	93180A917	00000
						30	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603	10	93180A918	00000
						40	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603	10	93180A919	00000
						50	Fully Threaded	Coarse	20.65	4.88	8.58	5.6	70,000	DIN 603	5	93180A921	0000




								M10 × 1.5 mm

								25	Fully Threaded	Coarse	24.65	5.38	10.58	6.6	70,000	DIN 603	5	93180A922	00000


								30	Fully Threaded	Coarse	24.65	5.38	10.58	6.6	70,000	DIN 603	5	93180A923	00000
								40	Fully Threaded	Coarse	24.65	5.38	10.58	6.6	70,000	DIN 603	5	93180A924	00000
								50	Fully Threaded	Coarse	24.65	5.38	10.58	6.6	70,000	DIN 603	5	93180A925	00000
								70	Fully Threaded	Coarse	24.65	5.38	10.58	6.6	70,000	DIN 603	1	93180A926	0000