BSF Socket Cap Screws LEFT hand thread
From £0.43 (excl. VAT)
BSF Socket Cap Screws with a left hand thread direction and hex socket head.
Designed for use in applications where standard right hand threads may loosen due to rotation or vibration, these screws are essential in classic British vehicles, vintage machinery, and specialised restoration projects.
With their fine pitch and high tensile strength they are ideal for precision assemblies in heritage motorcycles like Triumph, BSA and Norton, as well as period correct industrial equipment.
Check thread TPI here
BSF Nut options click here
Imperial Washers click here
All Available Sizes & Types
| SKU | Name | Thread Size (T) | Length (L) | Material / Finish |
|---|---|---|---|---|
| SKU: BSF.CAP.1/2X21/2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/2" | Length (L): 2 1/2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/2X3.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/2" | Length (L): 3" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/4X1.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/4" | Length (L): 1" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/4X11/2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/4" | Length (L): 1 1/2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/4X11/4.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/4" | Length (L): 1 1/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/4X13/4.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/4" | Length (L): 1 3/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/4X2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/4" | Length (L): 2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X1.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 1" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X11/2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 1 1/2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X11/4.SC | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 1 1/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X21/2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 2 1/2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X3/4.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 3/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.5/16X11/2.A2S | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 5/16" | Length (L): 1 1/2" | Material / Finish: A2 Stainless Steel |
| SKU: BSF.CAP.5/16X11/4.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 5/16" | Length (L): 1 1/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.5/16X13/4.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 5/16" | Length (L): 1 3/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.5/16X2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 5/16" | Length (L): 2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.7/16X11/2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 7/16" | Length (L): 1 1/2" | Material / Finish: Self Colour |
All Available Sizes & Types
| SKU | Name | Thread Size (T) | Length (L) | Material / Finish |
|---|---|---|---|---|
| SKU: BSF.CAP.1/2X21/2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/2" | Length (L): 2 1/2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/2X3.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/2" | Length (L): 3" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/4X1.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/4" | Length (L): 1" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/4X11/2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/4" | Length (L): 1 1/2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/4X11/4.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/4" | Length (L): 1 1/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/4X13/4.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/4" | Length (L): 1 3/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.1/4X2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 1/4" | Length (L): 2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X1.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 1" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X11/2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 1 1/2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X11/4.SC | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 1 1/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X21/2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 2 1/2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.3/8X3/4.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 3/8" | Length (L): 3/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.5/16X11/2.A2S | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 5/16" | Length (L): 1 1/2" | Material / Finish: A2 Stainless Steel |
| SKU: BSF.CAP.5/16X11/4.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 5/16" | Length (L): 1 1/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.5/16X13/4.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 5/16" | Length (L): 1 3/4" | Material / Finish: Self Colour |
| SKU: BSF.CAP.5/16X2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 5/16" | Length (L): 2" | Material / Finish: Self Colour |
| SKU: BSF.CAP.7/16X11/2.SC.LH | Name: BSF Socket Cap Screws LEFT hand thread | Thread Size (T): 7/16" | Length (L): 1 1/2" | Material / Finish: Self Colour |
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