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Accurate Screw Machine

66580S8 - Carbon Steel 4-40 Concealed Head Stud

0.25 Inch Carbon Steel 4-40 concealed head stud with a 0.1875 Inch hex size and 0.172 Inch mounting hole.

Download CAD
Unit System
Specs (in standard)
Label Value
A 0.171 in
Brand Accurate Screw
Display Name 66580S8
Finish None
Hex Size 0.1875 in
Length L 0.25 in
Material Carbon Steel
Model Number 66580
Mounting Hole Size 0.172 in
Thread Size 4-40
Specs (in metric)
Label Value
A 4.34 mm
Brand Accurate Screw
Display Name 66580S8
Finish None
Hex Size 4.76 mm
Length L 6.35 mm
Material Carbon Steel
Model Number 66580
Mounting Hole Size 4.37 mm
Thread Size 4-40

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