1/8"-28 BSP tap parallel tap needed

[indianken]

Just to help me out, how can you tell? I had assumed that a bottoming tap would be a parallel thread.

Bruce,

Your quite correct. I should have looked closer. Usually they would be
listed as a BSPP., then as Taper, Plug, Bottoming.

Can I plead to; " Too much gin in my drink "?
Ken Smith

 

[bmetcalf]

A plug tap , or bottoming tap as you say is parallel threaded right to the end with no lead. BSP is a pipe thread and is available in taper and parallel types.

We agree!
My link is for
"15 available for immediate delivery. [FONT=Arial, Helvetica] TAP[/FONT] BSP[FONT=Arial, Helvetica] 1/8" X 28 BOTTOM [/FONT] [FONT=Arial, Helvetica][SIZE=-1] Quantity in Basket: None
Code: 5575
Price: $18.00
Shipping Weight: 0.19 pounds[/SIZE][/FONT]"

 

[vapide]

There is a built-in confusion here, in that a taper tap is usually a first-operation tap, which has the lower half tapered for easy starting, but a tapered tap is one for cutting tapered pipe threads. Since BSP is one of the few threadings that has both a parallel and taper (as in pipe taper) version, when buying a tap from a poorly informed vendor is can be hard to know what one is buying. The suppliers here, like Vermont American, do not help, by simply listing them as "Metric BSP" tap instead of BSPT or BSPP.

 

[Ken Tidswell]

Anyone have any good idea how I can expeditiously and not too expensively get my hands on a 1/8" - 28 BSP parallel (bolt-style straight thread, not tapered pipe thread) tap?

All I have been able to find here (US) are places that want $20+ for them, and $8+ shipping on top of that, or vendors that SWEAR they have the straight thread ones, but then send me tapered (BSP tapered is very common here, since the metric system seems to have adopted it, but straight almost unheard of. and the P-for-pipe seems to throw them off).

Tracey tools UK have a website . they are always the cheapest

 

[ClassicBiker]

Anyone have any good idea how I can expeditiously and not too expensively get my hands on a 1/8" - 28 BSP parallel (bolt-style straight thread, not tapered pipe thread) tap?

All I have been able to find here (US) are places that want $20+ for them, and $8+ shipping on top of that, or vendors that SWEAR they have the straight thread ones, but then send me tapered (BSP tapered is very common here, since the metric system seems to have adopted it, but straight almost unheard of. and the P-for-pipe seems to throw them off).

I've purchased from both these firms with no problem. The British fastener has a whole page devoted to BSP both taper and parallel. Whole Sale Tool is just down the road and they have them on the shelf.

British Standard Whitworth (BSW) Tap

www.wttool.com

BSP TAPS - British Tools & Fasteners

British Tools & Fasteners sells British sized tools, nuts, bolts, taps and dies for English cars and motorcycles. Get all your Whitworth tools, BSC, British Cycle, British Standard Fine, BSF, King Dick, Everest & Koken parts from British Tools & Fasteners.

britishfasteners.com

 

[Marcus Bowden]

Catching up on old requests, some have a lot of time on their hands.

 

[Robert Watson]

I was going to say that I would hope after 11 years he had the issue sorted!