Standard Machine Screws

External Tooth Lock Washer SEMS Screws

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General

ThreadH
Height
G
Washer Outside Diameter
W
Washer Thickness
Drive Size
Cross Recess
Drive Size
6 -Lobe
2 - 56.062 / .053.180 / .170.016 / .0101T7
4 - 40.080 / .070.230 / .220.018 / .0121T10
6 - 32.097 / .087.285 / .270.022 / .0162T15
8 - 32.115 / .105.320 / .305.023 / .0182T20
10 - 32.133 / .122.381 / .365.024 / .0182T25
1/4 - 20.175 / .162.510 / .494.028 / .0233T30

Length

LengthL
(Length Code)
±.005
1/8.125 / .105
3/16.187 / .167
1/4.250 / .230
5/16.313 / .293
3/8.375 / .355
7/16.438 / .418
1/2.500 / .480
9/16.563 / .533
5/8.625 / .595
3/4.750 / .720
7/8.875 / .845
11.000 / .970
1 - 1/41.250 / 1.190
1 - 3/81.375 / 1.315
1 - 1/21.500 / 1.440
1 - 5/81.625 / 1.565
1 - 3/41.750 / 1.690
1 - 7/81.875 / 1.815
22.000 / 1.940

Material

MaterialDescription
SS18 - 8 Stainless Steel
STLLow Carbon Steel

Finish

FinishDescription
PPassivated
PLNPlain
Z - BLKZinc Black
ZZinc Clear

Drive

DriveDescription
TX6 - Lobe
PHCross Recess
SLSlotted
SL - TXSlotted - 6 - Lobe
SL - PHSlotted - Cross Recess

General

ThreadH
Height
G
Washer Outside Diameter
W
Washer Thickness
Drive Size
Cross Recess
Drive Size
6 -Lobe
M2.5 x 0.451.8 / 1.665.85 / 5.45.45 / .301T8
M3 x 0.52.0 / 1.865.85 / 5.45.45 / .301T10
M3.5 x 0.62.4 / 2.267.35 / 6.85.55 / .402T15
M4 x 0.72.6 /2.468.25 / 7.75.60 / .452T20
M5 x 0.83.3 / 3.1210.50 / 10.00.65 / .502T25
M6 x 13.9 / 3.612.10 / 11.60.75 / .603T30
M8 x 1.255.0 / 4.716.00 / 15.25.85 / .704T40

Length

LengthL
(Length Code)
±0.13
44.3 / 3.7
88.0 / 7.2
55.0 / 4.2
66.0 / 5.2
1010.3 / 9.7
2020.5 / 19.5
1212.4 / 11.6
1414.4 / 13.6
1616.4 / 15.6
2525.5 / 24.5
3030.5 / 29.5
3535.5 / 34.5
33.2 / 2.8

Material

MaterialDescription
SS18 - 8 Stainless Steel
STLLow Carbon Steel

Finish

FinishDescription
PPassivated
PLNPlain
Z - BLKZinc Black
ZZinc Clear

Drive

DriveDescription
TX6 - Lobe
PHCross Recess
SLSlotted
SL - TXSlotted - 6 - Lobe
SL - PHSlotted - Cross Recess