ASME B18.2.3.9M Screws | McMaster-Carr

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38 Products

About Hex Head Screws and Bolts

Fully Threaded

Partially Threaded

Use these Class 10.9 steel screws for high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. The flange distributes pressure where the screw meets the surface, so you don’t need a separate washer. All screws meet ISO or SAE specifications for material quality. Head height includes the flange. Length is measured from under the flange.

Black-phosphate steel screws are mildly corrosion resistant in dry environments.

Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Screws that meet ASME or DIN specifications are made to strict dimensional standards.

				Head, mm
Lg., mm	Threading	Min. Thread Lg., mm	Thread Spacing	Wd.	Ht.	Flange Dia., mm	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
Black-Phosphate Class 10.9 Steel
M8 × 1.25 mm
20	Fully Threaded	__	Coarse	13	8.1	18	150,000	ASME B18.2.3.9M, SAE J1199	50	000000000	000000
25	Fully Threaded	__	Coarse	13	8.1	18	150,000	ASME B18.2.3.9M, SAE J1199	50	000000000	00000
30	Fully Threaded	__	Coarse	13	8.1	18	150,000	ASME B18.2.3.9M, SAE J1199	50	000000000	00000
35	Partially Threaded	22	Coarse	13	8.1	18	150,000	ASME B18.2.3.9M, SAE J1199	50	000000000	00000
40	Partially Threaded	22	Coarse	13	8.1	18	150,000	ASME B18.2.3.9M, SAE J1199	50	000000000	00000
45	Partially Threaded	22	Coarse	13	8.1	18	150,000	ASME B18.2.3.9M, SAE J1199	25	000000000	00000
50	Partially Threaded	22	Coarse	13	8.1	18	150,000	ASME B18.2.3.9M, SAE J1199	25	000000000	00000
60	Partially Threaded	22	Coarse	13	8.1	18	150,000	ASME B18.2.3.9M, SAE J1199	25	000000000	00000
M10 × 1.5 mm
20	Fully Threaded	__	Coarse	15	9.2	22.3	150,000	ASME B18.2.3.9M, SAE J1199	25	000000000	00000
25	Fully Threaded	__	Coarse	15	9.2	22.3	150,000	ASME B18.2.3.9M, SAE J1199	25	000000000	00000
30	Fully Threaded	__	Coarse	15	9.2	22.3	150,000	ASME B18.2.3.9M, SAE J1199	25	000000000	00000
40	Partially Threaded	26	Coarse	15	9.2	22.3	150,000	ASME B18.2.3.9M, SAE J1199	25	000000000	00000
45	Partially Threaded	26	Coarse	15	10.4	22.3	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
50	Partially Threaded	26	Coarse	15	10.4	22.3	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
60	Partially Threaded	26	Coarse	15	10.4	22.3	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
70	Partially Threaded	26	Coarse	15	10.4	22.3	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
80	Partially Threaded	26	Coarse	15	10.4	22.3	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
90	Partially Threaded	26	Coarse	15	10.4	22.3	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
100	Partially Threaded	26	Coarse	15	10.4	22.3	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
M12 × 1.75 mm
25	Fully Threaded	__	Coarse	18	11.8	26.6	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
30	Fully Threaded	__	Coarse	18	11.8	26.6	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
35	Fully Threaded	__	Coarse	18	11.8	26.6	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
40	Fully Threaded	__	Coarse	18	11.8	26.6	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
50	Partially Threaded	30	Coarse	18	11.8	26.6	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
60	Partially Threaded	30	Coarse	18	11.8	26.6	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
70	Partially Threaded	30	Coarse	18	11.8	26.6	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
80	Partially Threaded	30	Coarse	18	11.8	26.6	150,000	ASME B18.2.3.9M, SAE J1199	10	000000000	00000
90	Partially Threaded	30	Coarse	18	11.8	26.6	150,000	ASME B18.2.3.9M, SAE J1199	5	000000000	00000
100	Partially Threaded	30	Coarse	18	11.8	26.6	150,000	ASME B18.2.3.9M, SAE J1199	5	000000000	00000
M16 × 2 mm
30	Fully Threaded	__	Coarse	24	15.4	35	150,000	ASME B18.2.3.9M, SAE J1199	5	000000000	00000
35	Fully Threaded	__	Coarse	24	15.4	35	150,000	ASME B18.2.3.9M, SAE J1199	5	000000000	00000
40	Fully Threaded	__	Coarse	24	15.4	35	150,000	ASME B18.2.3.9M, SAE J1199	5	000000000	00000
50	Fully Threaded	__	Coarse	24	15.4	35	150,000	ASME B18.2.3.9M, SAE J1199	5	000000000	00000
60	Partially Threaded	38	Coarse	24	15.4	35	150,000	ASME B18.2.3.9M, SAE J1199	5	000000000	00000
70	Partially Threaded	38	Coarse	24	15.4	35	150,000	ASME B18.2.3.9M, SAE J1199	5	000000000	00000
80	Partially Threaded	38	Coarse	24	15.4	35	150,000	ASME B18.2.3.9M, SAE J1199	5	000000000	00000
90	Partially Threaded	38	Coarse	24	15.4	35	150,000	ASME B18.2.3.9M, SAE J1199	5	000000000	00000
100	Partially Threaded	38	Coarse	24	15.4	35	150,000	ASME B18.2.3.9M, SAE J1199	1	000000000	0000

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About Hex Head Screws and Bolts

High-Strength Metric Class 10.9 Steel Flanged Hex Head Screws