Home > Fasteners > Screws > Machine Screw > SS Slotted Flat Head Machine Screw

Enlarge

SS Slotted 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 slotted flat head offers a countersunk design to allow for flush installation. These fasteners are available in 18-8 stainless steel.

Products
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 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 Slotted Flat Head Machine Screw

of 1

Sort By

Show

View

Diameter Length Item # Availability Price Quantity UOM

1/4

3/8

MFSS0250037

In Stock

$0.20024/EA

See Quantity Discounts

1/4-20 X 3/8 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.20024/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.20024/EA
1500	$0.18671/EA
5990	$0.1763/EA
26950	$0.11993/EA

1/4

1/2

MFSS0250050

In Stock

$0.0817/EA

See Quantity Discounts

1/4-20 X 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.0817/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.0817/EA
1380	$0.07618/EA
5520	$0.07193/EA
24830	$0.04893/EA

1/4

3/4

MFSS0250075

In Stock

$0.12891/EA

See Quantity Discounts

1/4-20 X 3/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.12891/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.12891/EA
930	$0.1202/EA
3700	$0.1135/EA
16640	$0.07721/EA

1/4

7/8

MFSS0250087

In Stock

$0.16019/EA

See Quantity Discounts

1/4-20 X 7/8 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.16019/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.16019/EA
880	$0.14937/EA
3520	$0.14104/EA
15810	$0.09595/EA

1/4

MFSS0250100

In Stock

$0.14614/EA

See Quantity Discounts

1/4-20 X 1 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.14614/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.14614/EA
750	$0.13626/EA
2990	$0.12867/EA
13460	$0.08753/EA

1/4

1 1/4

MFSS0250125

In Stock

$0.23825/EA

See Quantity Discounts

1/4-20 X 1 1/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.23825/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.23825/EA
620	$0.22214/EA
2450	$0.20977/EA
11020	$0.1427/EA

1/4

1 1/2

MFSS0250150

In Stock

$0.30877/EA

See Quantity Discounts

1/4-20 X 1 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.30877/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.30877/EA
550	$0.2879/EA
2170	$0.27186/EA
9730	$0.18494/EA

1/4

1 3/4

MFSS0250175

In Stock

$0.34237/EA

See Quantity Discounts

1/4-20 X 1 3/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.34237/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.34237/EA
480	$0.31923/EA
1900	$0.30145/EA
8540	$0.20506/EA

1/4

MFSS0250200

In Stock

$0.29804/EA

See Quantity Discounts

1/4-20 X 2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.29804/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.29804/EA
430	$0.27789/EA
1700	$0.26241/EA
7620	$0.17851/EA

1/4

2 1/2

MFSS0250250

3-5 Working Days

$0.48538/EA

See Quantity Discounts

1/4-20 X 2 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.48538/EA

Qty

3-5 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$0.48538/EA
350	$0.45258/EA
1400	$0.42736/EA
6260	$0.29072/EA

1/4

MFSS0250300

In Stock

$0.63468/EA

See Quantity Discounts

1/4-20 X 3 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.63468/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.63468/EA
300	$0.59178/EA
1190	$0.55882/EA
5320	$0.38014/EA

3/8

3/4

MFSS0370075

In Stock

$0.81566/EA

See Quantity Discounts

3/8-16 X 3/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.81566/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.81566/EA
350	$0.76053/EA
1390	$0.71816/EA
6250	$0.48853/EA

3/8

MFSS0370100

In Stock

$0.57281/EA

See Quantity Discounts

3/8-16 X 1 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.57281/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.57281/EA
290	$0.53409/EA
1150	$0.50434/EA
5160	$0.34308/EA

3/8

1 1/4

MFSS0370125

In Stock

$1.26904/EA

See Quantity Discounts

3/8-16 X 1 1/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$1.26904/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.26904/EA
250	$1.18327/EA
980	$1.11735/EA
4390	$0.76009/EA

3/8

1 1/2

MFSS0370150

In Stock

$0.88106/EA

See Quantity Discounts

3/8-16 X 1 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.88106/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.88106/EA
220	$0.82151/EA
850	$0.77574/EA
3830	$0.5277/EA

3/8

1 3/4

MFSS0370175

In Stock

$0.76091/EA

See Quantity Discounts

3/8-16 X 1 3/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.76091/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.76091/EA
190	$0.70948/EA
760	$0.66996/EA
3390	$0.45574/EA

3/8

MFSS0370200

In Stock

$0.98286/EA

See Quantity Discounts

3/8-16 X 2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.98286/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.98286/EA
170	$0.91643/EA
680	$0.86537/EA
3040	$0.58868/EA

3/8

MFSS0370300

3-5 Working Days

$0.80096/EA

See Quantity Discounts

3/8-16 X 3 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.80096/EA

Qty

3-5 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$0.80096/EA
120	$0.74683/EA
480	$0.70522/EA
2150	$0.47973/EA

3/8

MFSS0370400

3-5 Working Days

$0.80096/EA

See Quantity Discounts

3/8-16 X 4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$0.80096/EA

Qty

3-5 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$0.80096/EA
100	$0.74683/EA
370	$0.70522/EA
1670	$0.47973/EA

1/2

3/4

MFSS0500075

In Stock

$1.60192/EA

See Quantity Discounts

1/2-13 X 3/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$1.60192/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.60192/EA
270	$1.49365/EA
1050	$1.41044/EA
4710	$0.95946/EA

1/2

MFSS0500100

3-5 Working Days

$1.33761/EA

See Quantity Discounts

1/2-13 X 1 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$1.33761/EA

Qty

3-5 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$1.33761/EA
200	$1.2472/EA
780	$1.17772/EA
3480	$0.80115/EA

1/2

1 1/2

MFSS0500150

In Stock

$1.47909/EA

See Quantity Discounts

1/2-13 X 1 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$1.47909/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.47909/EA
130	$1.37913/EA
510	$1.30229/EA
2290	$0.8859/EA

1/2

MFSS0500200

In Stock

$2.20264/EA

See Quantity Discounts

1/2-13 X 2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$2.20264/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.20264/EA
110	$2.05377/EA
410	$1.93935/EA
1810	$1.31926/EA

1/2

2 1/2

MFSS0500250

In Stock

$1.57497/EA

See Quantity Discounts

1/2-13 X 2 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$1.57497/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.57497/EA
80	$1.46852/EA
320	$1.38671/EA
1430	$0.94332/EA

1/2

MFSS0500300

In Stock

$1.92231/EA

See Quantity Discounts

1/2-13 X 3 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$1.92231/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.92231/EA
70	$1.79238/EA
270	$1.69252/EA
1210	$1.15136/EA

1/2

MFSS0500400

In Stock

$4.70897/EA

See Quantity Discounts

1/2-13 X 4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

$4.70897/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.70897/EA
50	$4.3907/EA
200	$4.14609/EA
890	$2.82041/EA

SS Slotted Flat Head Machine Screw

Technical Data

Dimensional Specifications

Dimensional SpecificationsType 2A Threads for Machine Screws

Dimensional SpecificationsSlotted Flat Head for Machine Screws

You've Selected

Grade

Diameter

Thread Pitch

Length

Head Diam

Drive Size

1/4-20 X 3/8 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/4-20 X 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/4-20 X 3/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/4-20 X 7/8 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/4-20 X 1 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/4-20 X 1 1/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/4-20 X 1 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/4-20 X 1 3/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/4-20 X 2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/4-20 X 2 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/4-20 X 3 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

3/8-16 X 3/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

3/8-16 X 1 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

3/8-16 X 1 1/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

3/8-16 X 1 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

3/8-16 X 1 3/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

3/8-16 X 2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

3/8-16 X 3 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

3/8-16 X 4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/2-13 X 3/4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/2-13 X 1 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/2-13 X 1 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/2-13 X 2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/2-13 X 2 1/2 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/2-13 X 3 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW

1/2-13 X 4 STAINLESS STEEL SLOTTED FLAT HEAD MACHINE SCREW