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A286 Metric Screws

We, at TorqBolt Inc., offer these high-quality A286 Metric Screws in a wide number of options for rugged applications in various industries. We stock a large variety of A286 Alloy Screws in particular specifications of ASME, AMS, GE, and Werkstoff numbers. With excellent creep resistance, oxidation resistance, and corrosion resistance, these screws provide a superior level of high strength. The Alloy A-286, the austenitic material made of iron-nickel-chromium, has good fabrication characteristics. This further allows high ductility, high machinability, and high weldability for the required applications. High tensile strength and upscale performance at elevated temperatures guarantee their presence in the top choices of materials in typical applications in various industries.

A286 Metric Screw Chemical Properties
A286 Metric Screw Mechanical Properties
Thread Lengths for A286 Metric Screws ANSI/ASME B18.6.7M
Header Points for Cres A286 Metric Screws Before Threading ANSI/ASME B18.6.7M
Recommended Nominal Screw Lengths for A286 Metric Machine Screws
Clearance Holes for A286 Steel Metric Machine Screws
Hex Head Alloy A286 Metric Machine Screws ANSI/ASME B18.6.7M
Hex Flange Head A286 Metric Machine Screws ANSI/ASME B18.6.7M
A286 Metric Screws Specifications

A286 Metric Screw Chemical Properties

Iron (Fe)	49.1 to 59.5 %
Nickel (Ni)	24 to 27 %
Chromium (Cr)	13.5 to 16 %
Titanium (Ti)	1.9 to 2.4 %
Molybdenum (Mo)	1.0 to 1.5 %
Manganese (Mn)	0 to 2.0 %
Silicon (Si)	0 to 1.0 %
Vanadium (V)	0.1 to 0.5 %
Aluminum (Al)	0 to 0.35 %
Carbon (C)	0 to 0.080 %
Phosphorus (P)	0 to 0.040 %
Sulfur (S)	0 to 0.030 %
Boron (B)	0.0010 to 0.010 %

A286 Metric Screw Mechanical Properties

Test Temperature		0.02% Offset Yield Strength		0.2% Offset Yield Strength		Tensile Strength		% Elongation in 2″	% Reduction of Area
Test Temperature		0.02% Offset Yield Strength		0.2% Offset Yield Strength		Tensile Strength		% Elongation in 2″	% Reduction of Area
°F	°C	ksi	MPa	ksi	MPa	ksi	MPa	(50.8 mm)
70	21.1	90	621	95	655	145	1000	24	45
400	204	76	524	93.5	645	143	986	21.5	52
800	427	72	496	93	641	138	951	18.5	35
1000	538	62	427	87.5	603	131	903	18.5	31
1100	593	64.5	445	90	621	122	841	21	23
1200	649	62.5	431	88	607	103.5	714	13	14.5
1300	704	68.5	472	86	593	86.5	596	11	10
1400	760	44.5	307	62	427	64	441	18.5	23
1500	816	31	214	33	228	36.5	252	68.5	37.5

Thread Lengths for A286 Metric Screws ANSI/ASME B18.6.7M

Thread Lengths for A286 Metric Screws
ANSI/ASME B18.6.7M

Nominal Screw Size and Thread Pitch	L	LUS	LU	L		LUS	LUL	L	B
	Nominal Screw Length Equal to or Shorter than a	Unthreaded Lengthb		Nominal Screw Lengtha		Unthreaded Lengthb		Nominal Screw Length Longer thana	Full Form Thread Lengthc
	Nominal Screw Length Equal to or Shorter than a	Maxd	Maxc	Over	To and Including	Maxd	Maxc	Nominal Screw Length Longer thana	Min
M2×0.5	6	1.0	0.4	6	30	1.0	0.8	30	25.0
M2.5×0.45	8	1.1	0.5	8	30	1.1	0.9	30	25.0
M3×0.5	9	1.2	0.5	9	30	1.2	1.0	30	25.0
M3.5×0.6	10	1.5	0.6	10	50	1.5	1.2	50	38.0
M4×0.7	12	1.8	0.7	12	50	1.8	1.4	50	38.0
M5×0.8	15	2.0	0.8	15	50	2.0	1.6	50	38.0
M6×1	18	2.5	1.0	18	50	2.5	2.0	50	38.0
M8×1.25/td>	24	3.1	1.2	24	50	3.1	2.5	50	38.0
M10×1.5	30	3.8	1.5	30	50	3.8	3.0	50	38.0
M12×1.75	36	4.4	1.8	36	50	4.4	3.5	50	38.0
a The length tolerances for metric machine screws are: up to 3 mm, incl., ± 0.2 mm; over 3 to 10 mm, incl., ± 0.3 mm; over 10 to 16 mm, incl., ± 0.4 mm; over 16 to 50 mm, incl., ± 0.5 mm; over 50 mm, ±1.0 mm. b Unthreaded lengths LU and LUS represent the distance, measured parallel to the axis of screw, from the underside of the head to the face of a nonchamfered or noncounterbored standard GO thread ring gage assembled by hand as far as the thread will permit. c Refer to the illustrations for respective screw head styles. d The LUS values apply only to heat treated recessed flat countersunk head screws. e The LU values apply to all screws except heat treated recessed flat countersunk head screws. All dimensions in millimeters.

Header Points for Cres A286 Metric Screws Before Threading ANSI/ASME B18.6.7M

Header Points for Cres A286 Metric Screws Before Threading
ANSI/ASME B18.6.7M

Nominal Screw Size and Thread	DP		La
	Point Diameter		Nominal Screw Length
	Max	Min	Max
M2×0.4	1.33	1.21	13
M2.5×0.45	1.73	1.57	13
M3×0.5	2.12	1.93	16
M3.5×0.6	2.46	2.24	20
M4×0.7	2.80	2.55	25
M5×0.8	3.60	3.28	30
M6×1	4.25	3.85	40
M8×1.25	5.82	5.30	40
M10×1.5	7.36	6.71	40
M12×1.75	8.90	8.11	45
a Header points apply to these nominal lengths or shorter. The pointing of longer lengths may require machining to the dimensions specified. All dimensions in millimeters.

Recommended Nominal Screw Lengths for A286 Metric Machine Screws

Nominal Screw Lengths for
A286 Metric Machine Screws

Nominal Screw Size and Thread Pitch	DS		SA		Ea	K		DA	R
	Body Diameter		Hex Width Across Flats		Hex Width Across Corners	Head Height		Underhead Fillet
	Body Diameter		Hex Width Across Flats		Hex Width Across Corners	Head Height		Transition Dia	Radius
	Max	Min	Max	Min	Min	Max	Min	Max	Min
M2 × 0.4	2.00	1.65	3.20	3.02	3.38	1.6	1.3	2.6	0.1
M2.5 × 0.45	2.50	2.12	4.00	3.82	4.28	2.1	1.8	3.1	0.1
M3 × 0.5	3.00	2.58	5.00	4.82	5.40	2.3	2.0	3.6	0.1
M3.5 × 0.6	3.50	3.00	5.50	5.32	5.96	2.6	2.3	4.1	0.1
M4 × 0.7	4.00	3.43	7.00	6.78	7.59	3.0	2.6	4.7	0.2
M5 × 0.8	5.00	4.36	8.00	7.78	8.71	3.8	3.3	5.7	0.2
M6 × 1	6.00	5.21	10.00	9.78	10.95	4.7	4.1	6.8	0.3
M8 × 1.25	8.00	7.04	13.00	12.73	14.26	6.0	5.2	9.2	0.4
M10 × 1.5	10.00	8.86	16.00	15.73	17.62	7.5	6.5	11.2	0.4
M12 × 1.75	12.00	10.68	18.00	17.73	19.86	9.0	7.8	13.2	0.4
M10 × 1.5b	10.00	8.86	15.00	14.73	16.50	7.5	6.5	11.2	0.4
a Dimensions across flats and across corners of the head are measured at the point of maximum metal. Taper of sides of head (angle between one side and the axis) shall not exceed 2° or 0.10 mm, whichever is greater, the specified width across flats being the large dimension. b The M10 size screws having heads with 15 mm width across flats are not ISO Standard. Unless M10 size screws with 15 mm width across flats are specifically ordered, M10 size screws with 16 mm width across flats shall be furnished.

Clearance Holes for A286 Steel Metric Machine Screws

Clearance Holes for
A286 Steel Metric Machine Screws

Nominal Screw Size and Thread Pitch	Body Diameter, DS		Hex Width Across Flats, Sa		Hex Width Across Corners, Ea Min	Flange Diameter, DC		Overall Head Height, K	Hex Height, K1 Min,	Flange Edge Thickness, Cb Min	Flange Top Fillet Radius, R<sub1 Max	Underhead Fillet
Nominal Screw Size and Thread Pitch	Max	Min	Max	Min	Hex Width Across Corners, Ea Min	Max	Min	Overall Head Height, K	Hex Height, K1 Min,	Flange Edge Thickness, Cb Min	Flange Top Fillet Radius, R<sub1 Max	Max Transition Dia, DA	Min Radius, R
M2 × 0.4	2.00	1.65	3.00	2.84	3.16	4.5	4.1	2.2	1.3	0.3	0.1	2.6	0.1
M2.5 × 0.45	2.50	2.12	3.20	3.04	3.39	5.4	5.0	2.7	1.6	0.3	0.2	3.1	0.1
M3 × 0.5	3.00	2.58	4.00	3.84	4.27	6.4	5.9	3.2	1.9	0.4	0.2	3.6	0.1
M3.5 × 0.6	3.50	3.00	5.00	4.82	5.36	7.5	6.9	3.8	2.4	0.5	0.2	4.1	0.1
M4 × 0.7	4.00	3.43	5.50	5.32	5.92	8.5	7.8	4.3	2.8	0.6	0.2	4.7	0.2
M5 × 0.8	5.00	4.36	7.00	6.78	7.55	10.6	9.8	5.4	3.5	0.7	0.3	5.7	0.2
M6 × 1	6.00	5.21	8.00	7.78	8.66	12.8	11.8	6.7	4.2	1.0	0.4	6.8	0.3
M8 × 1.25	8.00	7.04	10.00	9.78	10.89	16.8	15.5	8.6	5.6	1.2	0.5	9.2	0.4
M10 × 1.5	10.00	8.86	13.00	12.72	14.16	21.0	19.3	10.7	7.0	1.4	0.6	11.2	0.4
M12 × 1.75	12.00	10.68	15.00	14.72	16.38	24.8	23.3	13.7	8.4	1.8	0.7	13.2	0.4

Hex Head Alloy A286 Metric Machine Screws ANSI/ASME B18.6.7M

Nominal Screw Size and Thread Pitch	L	LUS	LU	L		LUS	LUL	L	B
	Nominal Screw Length Equal to or Shorter than a	Unthreaded Lengthb		Nominal Screw Lengtha		Unthreaded Lengthb		Nominal Screw Length Longer thana	Full Form Thread Lengthc
	Nominal Screw Length Equal to or Shorter than a	Maxd	Maxc	Over	To and Including	Maxd	Maxc	Nominal Screw Length Longer thana	Min
M2×0.5	6	1.0	0.4	6	30	1.0	0.8	30	25.0
M2.5×0.45	8	1.1	0.5	8	30	1.1	0.9	30	25.0
M3×0.5	9	1.2	0.5	9	30	1.2	1.0	30	25.0
M3.5×0.6	10	1.5	0.6	10	50	1.5	1.2	50	38.0
M4×0.7	12	1.8	0.7	12	50	1.8	1.4	50	38.0
M5×0.8	15	2.0	0.8	15	50	2.0	1.6	50	38.0
M6×1	18	2.5	1.0	18	50	2.5	2.0	50	38.0
M8×1.25/td>	24	3.1	1.2	24	50	3.1	2.5	50	38.0
M10×1.5	30	3.8	1.5	30	50	3.8	3.0	50	38.0
M12×1.75	36	4.4	1.8	36	50	4.4	3.5	50	38.0
a Dimensions across flats and across corners of the head are measured at the point of maximum metal. Taper of sides of head (angle between one side and the axis) shall not exceed 2° or 0.10 mm, whichever is greater, the specified width across flats being the large dimension. b The contour of the edge at periphery of flange is optional provided the minimum flange thickness is maintained at the minimum flange diameter. The top surface of flange may be straight or slightly rounded (convex) upward. All dimensions in millimeters.

Hex Flange Head A286 Metric Machine Screws ANSI/ASME B18.6.7M

Nominal Screw Size and Thread Pitch	Basic Clearance Hole Diametera
Nominal Screw Size and Thread Pitch	Close Clearanceb	Normal Clearance (Preferred)b	Loose Clearanceb
M2	2.20	2.40	2.60
M2.5	2.70	2.90	3.10
M3	3.20	3.40	3.60
M3.5	3.70	3.90	4.20
M4	4.30	4.50	4.80
M5	5.30	5.50	5.80
M6	6.40	6.60	7.00
M8	8.40	9.00	10.00
M10	10.50	11.00	12.00
M12	13.00	13.50	14.50
a The values given in this table are minimum limits. The recommended plus tolerances are as follows: for clearance hole diameters over 1.70 to and including 5.80 mm, plus 0.12, 0.20, and 0.30 mm for close, normal, and loose clearances, respectively; for clearance hole diameters over 5.80 to 14.50mm, plus 0.18, 0.30, and 0.45 mm for close, normal, and loose clearances, respectively. b Normal clearance hole sizes are preferred. Close clearance hole sizes are for situations such as critical alignment of assembled components, wall thickness, or other limitations which necessitate the use of a minimal hole. Countersinking or counterboring at the fastener entry side may be necessary for the proper seating of the head. Loose clearance hole sizes are for applications where maximum adjustment capability between the components being assembled is necessary. All dimensions in millimeters.