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SS Slotted Round 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 round head offers a smooth, rounded head design with a slotted drive. 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 SpecificationsSlotted Round Head for Machine Screws

Slotted Round Head for Machine Screws dimensions

ASME B18.6.3-2013
Nominal Size	A		H		J		T		M		G	N	Phillips Drive Size
	Head Dimensions				Slot Dimensions				Phillips Dimensions
	Head Dimensions				Slot Dimensions				Phillips Dimensions
	Diameter		Height		Width		Depth		Diameter		Depth	Width
	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min
#2	0.162	0.146	0.069	0.059	0.031	0.023	0.048	0.037	0.100	0.087	0.053	0.017	1
#3	0.187	0.169	0.078	0.067	0.035	0.027	0.053	0.040	0.109	0.096	0.062	0.018	1
#4	0.211	0.193	0.086	0.075	0.039	0.031	0.058	0.044	0.118	0.105	0.072	0.019	1
#5	0.236	0.217	0.095	0.083	0.043	0.035	0.063	0.047	0.154	0.141	0.074	0.027	2
#6	0.260	0.240	0.103	0.091	0.048	0.039	0.068	0.051	0.162	0.149	0.084	0.027	2
#8	0.309	0.287	0.120	0.107	0.054	0.045	0.077	0.058	0.178	0.165	0.101	0.030	2
#10	0.359	0.334	0.137	0.123	0.060	0.050	0.087	0.065	0.195	0.182	0.119	0.031	2
#12	0.408	0.382	0.153	0.139	0.067	0.056	0.096	0.073	0.249	0.236	0.125	0.032	3
1/4	0.472	0.443	0.175	0.160	0.075	0.064	0.109	0.082	0.268	0.255	0.147	0.034	3
5/16	0.590	0.557	0.216	0.198	0.084	0.072	0.132	0.099	0.308	0.295	0.187	0.040	3
3/8	0.708	0.670	0.256	0.237	0.094	0.081	0.155	0.117	0.387	0.374	0.228	0.064	4
1/2	0.813	0.766	0.355	0.332	0.106	0.091	0.211	0.159	0.416	0.403	0.256	0.068	4

All dimensions are in inches.

SS Slotted Round Head Machine Screw

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Diameter Length Item # Availability Price Quantity UOM

3/16

MRSS 40018

In Stock

$0.04005/EA

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#4-40 X 3/16 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.04005/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.04005/ EA
5560	$0.03734/ EA
22230	$0.03526/ EA
88890	$0.02399/ EA

1/4

MRSS 40025

In Stock

$0.04005/EA

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#4-40 X 1/4 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.04005/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.04005/ EA
4550	$0.03734/ EA
18190	$0.03526/ EA
72730	$0.02399/ EA

5/16

MRSS 40031

In Stock

$0.0801/EA

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#4-40 X 5/16 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.0801/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.0801/ EA
3850	$0.07468/ EA
15390	$0.07052/ EA
61540	$0.04797/ EA

3/8

MRSS 40037

In Stock

$0.0801/EA

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#4-40 X 3/8 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.0801/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.0801/ EA
3580	$0.07468/ EA
14290	$0.07052/ EA
57150	$0.04797/ EA

7/16

MRSS 40043

In Stock

$0.12014/EA

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#4-40 X 7/16 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.12014/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.12014/ EA
3130	$0.11202/ EA
12500	$0.10578/ EA
50000	$0.07196/ EA

1/2

MRSS 40050

In Stock

$0.09099/EA

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#4-40 X 1/2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.09099/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.09099/ EA
2780	$0.08484/ EA
11120	$0.08011/ EA
44450	$0.0545/ EA

5/8

MRSS 40062

In Stock

$0.0801/EA

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#4-40 X 5/8 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.0801/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.0801/ EA
2500	$0.07468/ EA
10000	$0.07052/ EA
40000	$0.04797/ EA

3/4

MRSS 40075

In Stock

$0.0833/EA

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#4-40 X 3/4 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.0833/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.0833/ EA
2180	$0.07767/ EA
8700	$0.07334/ EA
34790	$0.04989/ EA

7/8

MRSS 40087

In Stock

$0.32038/EA

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#4-40 X 7/8 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.32038/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.32038/ EA
2000	$0.29873/ EA
8000	$0.28209/ EA
32000	$0.19189/ EA

MRSS 40100

In Stock

$0.09071/EA

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#4-40 X 1 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.09071/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.09071/ EA
1860	$0.08458/ EA
7410	$0.07987/ EA
29630	$0.05433/ EA

1 1/4

MRSS 40125

In Stock

$0.0801/EA

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#4-40 X 1 1/4 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.0801/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.0801/ EA
1520	$0.07468/ EA
6070	$0.07052/ EA
24250	$0.04797/ EA

1 1/2

MRSS 40150

In Stock

$0.0801/EA

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#4-40 X 1 1/2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.0801/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.0801/ EA
1390	$0.07468/ EA
5560	$0.07052/ EA
22230	$0.04797/ EA

#12

1/2

MRSS1220050

In Stock

$0.61594/EA

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#12-24 X 1/2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.61594/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.61594/ EA
1240	$0.57431/ EA
4940	$0.54231/ EA
22230	$0.36891/ EA

#12

3/4

MRSS1220075

In Stock

$0.16808/EA

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#12-24 X 3/4 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.16808/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.16808/ EA
970	$0.15672/ EA
3850	$0.14799/ EA
17310	$0.10067/ EA

#12

MRSS1220100

In Stock

$0.92903/EA

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#12-24 X 1 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.92903/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.92903/ EA
820	$0.86624/ EA
3280	$0.81798/ EA
14760	$0.55644/ EA

#12

1 1/4

MRSS1220125

In Stock

$0.37713/EA

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#12-24 X 1 1/4 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.37713/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.37713/ EA
720	$0.35164/ EA
2880	$0.33205/ EA
12950	$0.22588/ EA

#12

1 1/2

MRSS1220150

In Stock

$0.35667/EA

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#12-24 X 1 1/2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.35667/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.35667/ EA
650	$0.33256/ EA
2570	$0.31403/ EA
11540	$0.21362/ EA

#12

MRSS1220200

In Stock

$0.63765/EA

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#12-24 X 2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.63765/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.63765/ EA
530	$0.59455/ EA
2100	$0.56142/ EA
9430	$0.38191/ EA

#12

2 1/2

MRSS1220250

In Stock

$0.71698/EA

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#12-24 X 2 1/2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

$0.71698/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.71698/ EA
450	$0.66852/ EA
1780	$0.63128/ EA
8000	$0.42943/ EA

SS Slotted Round Head Machine Screw

Technical Data

Dimensional Specifications

Dimensional SpecificationsType 2A Threads for Machine Screws

Dimensional SpecificationsSlotted Round Head for Machine Screws

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Grade

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Thread Pitch

Length

Head Diam

Drive Size

#4-40 X 3/16 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#4-40 X 1/4 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#4-40 X 5/16 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#4-40 X 3/8 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#4-40 X 7/16 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#4-40 X 1/2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#4-40 X 5/8 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#4-40 X 3/4 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#4-40 X 7/8 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#4-40 X 1 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#4-40 X 1 1/4 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#4-40 X 1 1/2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#12-24 X 1/2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#12-24 X 3/4 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#12-24 X 1 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#12-24 X 1 1/4 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#12-24 X 1 1/2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#12-24 X 2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW

#12-24 X 2 1/2 STAINLESS STEEL SLOTTED ROUND HEAD MACHINE SCREW