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Small quantities.
A range of fasteners specially selected for Loudspeaker DIY enthusiasts.

Pan Head Screws
  Pan Head Wood Screws


Machine Screws
  Machine Screws


Button Head Bolts
  Button Head Bolts


Cap Head Bolts
  Cap Head Bolts


Cap Head Bolts BZP
  Cap Head Bolts BZP


Plain, Spring and Shakeproof Washers
  Plain, Spring, S-proof




Nylon Screws and Nylon Washers
  Nylon Cheese Head


Cap Head Screws, Bolts and Screws           Next

* Pan Head Wood Screws:    Chemically Blacked, Supadriv:  Sold in Packs of 10.

Order Code Size Price £  Order Code Size Price £  Order Code Size Price £ 
PHSB413 No4* 13 0.64 /10 PHSB619 No6* 19 0.86 /10 PHSB625 No6* 25 1.07 /10
***** ***** ***** PHSB819 No8* 19 0.86 /10 PHSB825 No8* 25 1.19 /10

* Pan Head Machine Screws:    Posidrive:  Sold in Packs of 10.

Order Code Size Price £  Order Code Size Price £  Order Code Size Price £ 
MSM420 M4* 20 0.72 /10 MSM520 M5* 20 ***** MSM620 ***** *****
MSM425 M4* 25 0.82 /10 MSM525 M5* 25 ***** MSM625 ***** *****
MSM430 M4* 30 ***** MSM530 M5* 30 ***** MSM630 ***** *****
MSM445 M4* 45 1.47 /10 MSM540 M5* 40 2.09 /10 MSM640 ***** *****
MSM450 ***** ***** MSM550 M5* 50 2.53 /10 MSM650 ***** *****

* Button Head Bolts:    Black & Oil Finish,  Hex Drive:  Sold in Packs of 10.

Order Code Size Price £  Order Code Size Price £  Order Code Size Price £ 
BTN420 M4* 20 2.69 /10 BTN520 M5* 20 2.95 /10 BTN620 M6* 20 2.69 /10
***** ***** ***** ***** ***** ***** BTN625 M6* 25 3.22 /10

* Cap Head Bolts:  Black & Oil Finish,  Hex Key Drive:  Sold in Packs of 10.

Order Code Size Price £  Order Code Size Price £  Order Code Size Price £ 
CAP420 M4* 20 2.15 /10 CAP520 M5* 20 2.15 /10 CAP620 M6* 20 2.15 /10
CAP425 M4* 25 2.15 /10 CAP525 M5* 25 2.15 /10 CAP625 M6* 25 2.15 /10
CAP430 M4* 30 2.69 /10 CAP530 M5* 30 2.69 /10 CAP630 M6* 30 2.69 /10
CAP440 M4* 40 3.76 /10 CAP540 M5* 40 3.22 /10 CAP640 M6* 40 3.22 /10

* Cap Head Bolts:   BZP.  Hex Key Drive:  Sold in Packs of 10.

Order Code Size Price £  Order Code Size Price £  Order Code Size Price £ 
CAPBZ420 M4* 20 2.95 /10 CAPBZ520 M5* 20 2.69 /10 CAPBZ620 M6* 20 2.15 /10
CAPBZ425 M4* 25 2.69 /10 CAPBZ525 M5* 25 2.15 /10 CAPBZ625 M6* 25 2.69 /10
CAPBZ430 M4* 30 2.69 /10 CAPBZ530 M5* 30 2.69 /10 CAPBZ630 M6* 30 2.69 /10
CAPBZ440 M4* 40 3.76 /10 CAPBZ540 M5* 40 3.22 /10 CAPBZ640 M6* 40 3.22 /10

* Steel  Washers: Plated:  Sold in Packs of 10.  CRWSHRM6 = Wavy Stainless Steel.
* Plain Washers *                      * Spring Washers *                 * Shakeproof Washers*

Order Code Size Price £ Order Code Size Price £ Order Code Size Price £
PWSHRM4 M4 0.12 /10 SPWSHRM4 M4 0.21 /10 SHWSHRM4 M4 0.35 /10
PWSHRM5 M5 0.19 /10 SPWSHRM5 M5 0.25 /10 SHWSHRM5 M5 0.39 /10
PWSHRM6 M6 0.28 /10 SPWSHRM6 M6 0.32 /10 CRWSHRM6 M6 0.56 /10


* Steel  Nuts: Plated or Chemi-Blacked:  Sold in Packs of 10 or 8.

Order Code Size Price £ Order Code Size Price £ Order Code Size Price £
NUTM4 M4 0.16 /10 NUTM5 M5 0.18 /10 NUTM6 M6 0.25 /10
NUTBLKM6 M6 0.35 /8 NUTBLKM81 M8 0.40 /8      

* Nylon Bolts and Washers:  Sold in Packs of 10.

Order Code Description Price 1 to 5   6 to 10  11 to 20
NYM315B Nylon, Slotted Cheese Head  Screws M3* 15 1.07 /10 0.97 /10 ******
NYM3WN Nylon, integral washered Nuts M3 1.74 /10 1.57 /10 ******
NYM410B Nylon, Slotted Cheese Head Screws M4* 10 1.26 /10 1.14 /10 ******
NYM420B Nylon, Slotted Cheese Head Screws M4* 20 1.36 /10 1.22 /10 ******
NYM425B Nylon, Slotted Cheese Head Screws M4* 25 1.45 /10 1.31 /10 ******
NYM430B Nylon, Slotted Cheese Head Screws M4* 30 1.53 /10 1.38 /10 ******
NYM435B Nylon, Slotted Cheese Head Screws M4* 35 1.64 /10 1.48 /10 ******
NYM4WN Nylon, integral washered Nuts M4 1.72 /10 1.66 /10 ******

The DIY Loudspeaker's Guide to Fasteners.

   Amongst the vast number of available fixings, QTA systems have selected a few which are useful for Loudspeaker construction.
        Wood Screws: Pan Head. Mild steel. Better grades are case-hardened and have hard tips. Available in cross-slot and / or Posidrive / Phillips heads. Finish is usually Bright Zinc Plated, known as a BZP finish. Other options include chemi and oil finish, known as Chemi-Blacked. Occasionally a spray paint finish is used.
       Machine Screws: Mild Steel. Pan Head Screws, plated (BZP) and fully threaded. Posidrive head. Many other varieties are used in different materials and finishes.
       Button Heads: Usually High Tensile steel or Stainless, self colour. Requires a hexagon key to tighten. Some are available in Chemi-Black finish. Note: Chemi-black finish is a 'cosmetic finish'. In a damp environment it WILL corrode.
       Cap Head Bolts: Same toughness as Button Heads, Note: Bolts usually have (20 - 25)mm threaded body length only. If you find you need a longer thread, carefully select the correct Bolt length. Bolts with a fully threaded body are known as SET Screws, NOT Bolts.
       Nylon: Made from hard Nylon. Being non-ferrous and therefore non-magnetic, useful for fitting Air Cored and Ferrite Cored Inductors without influencing their properties. Moderate strength, and should not be over-tightened. Available with Washered Nuts i.e. integral nut and washer.
      Washers: Two basic types, Plain and Shakeproof. Plain washers can be type A or B. This defines the outside diameter relative to the internal diameter. Type B have greater load-spreading ability so..... But not here. Subsets of Shakeproof are Spring, Crinkle and Wavy. Wavy are only available in Stainless Steel. Crinkle can be defined as Internal or External. We have internal. See the Pic.......... There are many others but...... So here endeth the lesson.


All Prices include VAT @ 17.5%.   See carriage charges for further information.

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