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#4 Jam Screws, Hollow Lock Screws

Hex socket jam screws, sometimes called hollow lock screws, are used to tighten springs into tapped holes. The hex socket extends the length of the inside of the screw and allows for inspection of the locked part.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
Set ScrewILSocket Jam Screw (Hollow Lock Screw)SteelPlain#4-40 x 5/64hex jaminquire
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Set ScrewILSocket Jam Screw (Hollow Lock Screw)SteelPlain#4-40 x 3/32hex jaminquire
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MFSKSSocket Jam Screw (Hollow Lock Screw)SteelPlain#4-40 x 5/64jam, b18.3576
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BRIGHBESTILSocket Jam Screw (Hollow Lock Screw)SteelPlain#4-40 x 5/644-40 x 5/64 soc set jam screw alloy stl500
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