Brass Slotted Round Head Machine Screw
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Brass 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 brass.

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
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
Tolerance
on Length
Nominal
Screw Size
Nominal Screw Length
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
L 1/4 thru 3/4 -0.03 -0.03 -0.06 -0.09
  1. 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
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
  1. All dimensions are in inches.
Brass Slotted Round Head Machine Screw
View
Diameter Thread Pitch Length Item # Availability Price Quantity UOM
#4 40 1/4 MRSB 40025 In Stock $0.05042/EA EA
#4 40 3/8 MRSB 40037 In Stock $0.0801/EA EA
#4 40 1/2 MRSB 40050 In Stock $0.09095/EA EA
#4 40 3/4 MRSB 40075 In Stock $0.08847/EA EA
#4 40 1 MRSB 40100 In Stock $0.05006/EA EA
#4 40 1 1/2 MRSB 40150 In Stock $0.40689/EA EA
#6 32 1/4 MRSB 60025 In Stock $0.04005/EA EA
#6 32 3/8 MRSB 60037 In Stock $0.21626/EA EA
#6 32 1/2 MRSB 60050 In Stock $0.08278/EA EA
#6 32 3/4 MRSB 60075 In Stock $0.07333/EA EA
#6 32 1 MRSB 60100 In Stock $0.17653/EA EA
#6 32 1 1/4 MRSB 60125 In Stock $0.20024/EA EA
#6 32 1 1/2 MRSB 60150 In Stock $0.35979/EA EA
#6 32 2 MRSB 60200 In Stock $0.297/EA EA
#8 32 1/4 MRSB 80025 In Stock $0.04005/EA EA
#8 32 3/8 MRSB 80037 In Stock $0.03969/EA EA
#8 32 1/2 MRSB 80050 In Stock $0.14862/EA EA
#8 32 5/8 MRSB 80062 In Stock $0.12014/EA EA
#8 32 3/4 MRSB 80075 In Stock $0.3666/EA EA
#8 32 1 MRSB 80100 In Stock $0.23805/EA EA
#8 32 1 1/4 MRSB 80125 In Stock $0.15815/EA EA
#8 32 1 1/2 MRSB 80150 In Stock $0.34169/EA EA
#8 32 1 3/4 MRSB 80175 In Stock $0.32038/EA EA
#8 32 2 MRSB 80200 In Stock $0.32767/EA EA
#8 32 3 MRSB 80300 In Stock $0.56067/EA EA
#10 24 1/4 MRSB1020025 In Stock $0.16019/EA EA
#10 24 3/8 MRSB1020037 In Stock $0.16019/EA EA
#10 24 1/2 MRSB1020050 In Stock $0.19535/EA EA
#10 24 3/4 MRSB1020075 In Stock $0.27421/EA EA
#10 24 1 MRSB1020100 In Stock $0.42034/EA EA
#10 24 1 1/4 MRSB1020125 In Stock $0.6966/EA EA
#10 24 1 1/2 MRSB1020150 In Stock $0.46087/EA EA
#10 24 1 3/4 MRSB1020175 In Stock $0.40048/EA EA
#10 24 2 MRSB1020200 In Stock $0.24029/EA EA
#10 24 2 1/2 MRSB1020250 In Stock $0.48058/EA EA
#10 32 1/4 MRSB1030025 In Stock $0.0853/EA EA
#10 32 3/8 MRSB1030037 In Stock $0.04005/EA EA
#10 32 1/2 MRSB1030050 In Stock $0.24517/EA EA
#10 32 3/4 MRSB1030075 In Stock $0.30929/EA EA
#10 32 1 MRSB1030100 In Stock $0.53937/EA EA
#10 32 1 1/4 MRSB1030125 In Stock $0.3308/EA EA
#10 32 1 1/2 MRSB1030150 In Stock $0.48626/EA EA
#10 32 2 MRSB1030200 In Stock $0.57749/EA EA
#10 32 3 MRSB1030300 In Stock $0.80096/EA EA
#12 24 1/4 MRSB1220025 In Stock $0.25026/EA EA
#12 24 1/2 MRSB1220050 In Stock $0.0801/EA EA
#12 24 3/4 MRSB1220075 In Stock $0.20024/EA EA
#12 24 1 MRSB1220100 In Stock $0.20024/EA EA
#12 24 1 1/4 MRSB1220125 In Stock $0.40048/EA EA
#12 24 1 1/2 MRSB1220150 In Stock $0.32038/EA EA
#12 24 2 MRSB1220200 In Stock $0.60072/EA EA
1/4 20 1/4 MRSB0250025 In Stock $0.29135/EA EA
1/4 20 3/8 MRSB0250037 In Stock $0.18022/EA EA
1/4 20 1/2 MRSB0250050 In Stock $0.24125/EA EA
1/4 20 3/4 MRSB0250075 In Stock $0.4855/EA EA
1/4 20 1 MRSB0250100 In Stock $0.77345/EA EA
1/4 20 1 1/4 MRSB0250125 In Stock $0.16019/EA EA
1/4 20 1 1/2 MRSB0250150 In Stock $0.11922/EA EA
1/4 20 2 MRSB0250200 In Stock $0.80096/EA EA
1/4 20 2 1/2 MRSB0250250 In Stock $0.85743/EA EA
1/4 20 3 MRSB0250300 In Stock $1.26552/EA EA
5/16 18 1/2 MRSB0310050 In Stock $0.64077/EA EA
5/16 18 3/4 MRSB0310075 In Stock $0.72087/EA EA
5/16 18 1 MRSB0310100 In Stock $0.76091/EA EA
5/16 18 1 1/4 MRSB0310125 In Stock $0.92111/EA EA
5/16 18 1 1/2 MRSB0310150 In Stock $1.04125/EA EA
5/16 18 2 MRSB0310200 In Stock $1.86848/EA EA
5/16 18 3 MRSB0310300 In Stock $1.60192/EA EA
3/8 16 1/2 MRSB0370050 In Stock $0.96115/EA EA
3/8 16 3/4 MRSB0370075 In Stock $0.72087/EA EA
3/8 16 1 MRSB0370100 In Stock $0.64077/EA EA
3/8 16 1 1/4 MRSB0370125 In Stock $1.39175/EA EA
3/8 16 1 1/2 MRSB0370150 In Stock $2.28274/EA EA
3/8 16 2 MRSB0370200 In Stock $1.84221/EA EA
3/8 16 3 MRSB0370300 In Stock $2.40288/EA EA
1/2 13 3/4 MRSB0500075 In Stock $1.80216/EA EA
1/2 13 1 MRSB0500100 In Stock $0.36043/EA EA
1/2 13 1 1/2 MRSB0500150 In Stock $7.78827/EA EA
1/2 13 2 1/2 MRSB0500250 In Stock $4.80577/EA EA