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SS Phillips Flat Head Machine Screw

Machine screws are uniformly threaded fasteners with a blunt end that are used with a threaded nut or threaded into a tapped hole. The phillips flat head offers a countersunk design to allow for flush installation. These fasteners are available in 18-8 stainless steel.

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Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsType 2A Threads for Machine Screws

Type 2A Threads for Machine Screws dimensions

ASME B1.1 (2008)
Nominal Size	Threads per Inch	Allowance	Major Diameter		Pitch Diameter			Stress Area in²
			Major Diameter		Pitch Diameter
			Max	Min	Max	Min	Tolerance
#0	80	0.0005	0.0595	0.0563	0.0514	0.0496	0.001762	0.00180
#1	64	0.0006	0.0724	0.0686	0.0623	0.0603	0.001970	0.00263
#1	72	0.0006	0.0724	0.0689	0.0634	0.0615	0.001899	0.00278
#2	56	0.0006	0.0854	0.0813	0.0738	0.0717	0.002127	0.00370
#2	64	0.0006	0.0854	0.0816	0.0753	0.0733	0.002040	0.00394
#3	48	0.0007	0.0983	0.0938	0.0848	0.0825	0.002302	0.00487
#3	56	0.0007	0.0983	0.0942	0.0867	0.0845	0.002191	0.00523
#4	40	0.0008	0.1112	0.1061	0.0950	0.0925	0.002507	0.00604
#4	48	0.0007	0.1113	0.1068	0.0978	0.0954	0.002361	0.00661
#5	40	0.0008	0.1242	0.1191	0.1080	0.1054	0.002562	0.00796
#5	44	0.0007	0.1243	0.1195	0.1095	0.1070	0.002484	0.00830
#6	32	0.0008	0.1372	0.1312	0.1169	0.1141	0.002820	0.00909
#6	40	0.0008	0.1372	0.1321	0.1210	0.1184	0.002614	0.01015
#8	32	0.0009	0.1631	0.1571	0.1428	0.1399	0.002916	0.01400
#8	36	0.0008	0.1632	0.1577	0.1452	0.1424	0.002804	0.01474
#10	24	0.0010	0.1890	0.1818	0.1619	0.1586	0.003319	0.01750
#10	32	0.0009	0.1891	0.1831	0.1688	0.1658	0.003004	0.02000
#12	24	0.0010	0.2150	0.2078	0.1879	0.1845	0.003400	0.02420
#12	28	0.0010	0.2150	0.2085	0.1918	0.1886	0.003224	0.02580
1/4	20	0.0011	0.2489	0.2408	0.2164	0.2127	0.003731	0.03180
1/4	28	0.0010	0.2490	0.2425	0.2258	0.2225	0.003322	0.03640
5/16	18	0.0012	0.3113	0.3026	0.2752	0.2712	0.004041	0.05240
5/16	24	0.0011	0.3114	0.3042	0.2843	0.2806	0.003660	0.05800
3/8	16	0.0013	0.3737	0.3643	0.3331	0.3287	0.004363	0.07750
3/8	24	0.0011	0.3739	0.3667	0.3468	0.3430	0.003804	0.08780
1/2	13	0.0015	0.4985	0.4876	0.4485	0.4435	0.004965	0.14190
1/2	20	0.0013	0.4987	0.4906	0.4662	0.4619	0.004288	0.15990

Nominal Screw Size	Nominal Screw Length (L) Tolerance
	Up to 1/2 in., incl.	Over 1/2 to 1 in., incl.	Over 1 to 2 in., incl.	Over 2 in.
0 thru 12	-0.02	-0.03	-0.06	-0.09
1/4 thru 3/4	-0.03	-0.03	-0.06	-0.09

All dimensions are in inches.

Dimensional SpecificationsPhillips Flat Head for Machine Screws

Slotted Flat Head for Machine Screws dimensions

ASME B18.6.3-2013
Nominal Size	A		H		J		T		M	R	N	F		G	Phillips Drive Size
	Head Dimensions				Slot Dimensions				Phillips Dimensions			Protrusion Above Gaging Diameter		Gaging Diameter
	Head Dimensions				Slot Dimensions				Phillips Dimensions
	Diameter		Height		Width		Depth		Diam.	Depth	Width
	Max	Min	Max	Min	Max	Min	Max	Min	Diam.	Depth	Width	Max	Min
#0	0.112	0.096	0.035	0.026	0.023	0.016	0.015	0.010	0.062	0.035	0.014	0.026	0.016	0.078	0
#1	0.137	0.120	0.043	0.033	0.026	0.019	0.019	0.012	0.070	0.043	0.015	0.028	0.016	0.101	0
#2	0.162	0.144	0.051	0.040	0.031	0.023	0.023	0.015	0.096	0.055	0.017	0.029	0.017	0.124	1
#3	0.187	0.167	0.059	0.047	0.035	0.027	0.027	0.017	0.100	0.060	0.018	0.031	0.018	0.148	1
#4	0.212	0.191	0.067	0.055	0.039	0.031	0.030	0.020	0.122	0.081	0.018	0.032	0.019	0.172	1
#5	0.237	0.215	0.075	0.062	0.043	0.035	0.034	0.022	0.148	0.074	0.027	0.034	0.020	0.196	2
#6	0.262	0.238	0.083	0.069	0.048	0.039	0.038	0.024	0.168	0.094	0.029	0.036	0.021	0.220	2
#8	0.312	0.285	0.100	0.084	0.054	0.045	0.045	0.029	0.182	0.110	0.030	0.039	0.023	0.267	2
#10	0.362	0.333	0.116	0.098	0.060	0.050	0.053	0.034	0.198	0.124	0.032	0.042	0.025	0.313	2
#12	0.412	0.380	0.132	0.112	0.067	0.056	0.060	0.039	0.262	0.144	0.035	0.045	0.027	0.362	3
1/4	0.477	0.442	0.153	0.131	0.075	0.064	0.070	0.046	0.276	0.160	0.036	0.050	0.029	0.424	3
5/16	0.597	0.556	0.191	0.165	0.084	0.072	0.088	0.058	0.358	0.205	0.061	0.057	0.034	0.539	4
3/8	0.717	0.670	0.230	0.200	0.094	0.081	0.106	0.070	0.386	0.234	0.065	0.065	0.039	0.653	4
1/2	0.815	0.765	0.223	0.186	0.106	0.091	0.103	0.065	0.418	0.265	0.069	0.081	0.049	0.739	4

All dimensions are in inches.

SS Phillips Flat Head Machine Screw

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Diameter Length Item # Availability Price Quantity UOM

5/16

1/2

MFPS0310050

3-5 Working Days

$0.22187/EA

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5/16-18 X 1/2 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW

$0.22187/EA

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3-5 Working Days

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Quantity	Price
Quantity	Price
1	$0.22187/EA
690	$0.20687/EA
2750	$0.19535/EA
12370	$0.13289/EA

5/16

3/4

MFPS0310075

In Stock

$0.47441/EA

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5/16-18 X 3/4 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW

$0.47441/EA

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In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.47441/EA
540	$0.44235/EA
2140	$0.4177/EA
9600	$0.28414/EA

5/16

MFPS0310100

In Stock

$0.41498/EA

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5/16-18 X 1 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW

$0.41498/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$0.41498/EA
440	$0.38693/EA
1750	$0.36537/EA
7840	$0.24855/EA

5/16

1 1/2

MFPS0310150

In Stock

$0.75531/EA

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5/16-18 X 1 1/2 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW

$0.75531/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$0.75531/EA
320	$0.70426/EA
1280	$0.66502/EA
5740	$0.45239/EA

5/16

MFPS0310200

In Stock

$0.7807/EA

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5/16-18 X 2 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW

$0.7807/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$0.7807/EA
260	$0.72793/EA
1010	$0.68738/EA
4530	$0.46759/EA

5/16

2 1/2

MFPS0310250

In Stock

$0.44501/EA

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5/16-18 X 2 1/2 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW

$0.44501/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$0.44501/EA
210	$0.41494/EA
840	$0.39182/EA
3740	$0.26654/EA

5/16

MFPS0310300

In Stock

$0.87089/EA

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5/16-18 X 3 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW

$0.87089/EA

Qty

In Stock

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Quantity	Price
Quantity	Price
1	$0.87089/EA
180	$0.81202/EA
710	$0.76678/EA
3190	$0.52161/EA

SS Phillips Flat Head Machine Screw

Technical Data

Dimensional Specifications

Dimensional SpecificationsType 2A Threads for Machine Screws

Dimensional SpecificationsPhillips Flat Head for Machine Screws

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5/16-18 X 1/2 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW

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5/16-18 X 1 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW

5/16-18 X 1 1/2 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW

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5/16-18 X 2 1/2 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW

5/16-18 X 3 STAINLESS STEEL PHILLIPS FLAT HEAD MACHINE SCREW