Whitworth thread plug gaugeBSF ring gage

Whitworth thread gauges (BSW/ BSF) supplier

Whitworth thread ring gauges and plug gauges

GO & NOGO, RH(ring hand)  & LH(left hand) available

Thread angle:  55°, rounded crests and roots

The BSW is the Coarse thread series of BS 84-Parallel Screw Threads of Whitworth Form.

We have as below BSW thread gauges .

3/16″x24 BSW 1/4″x20 BSW 5/16″x18 BSW 3/8″x16 BSW 7/16″x14 BSW
1/2″x12 BSW 9/16″x12 BSW 5/8″x11 BSW 11/16″x11 BSW 3/4″x10 BSW
13/16″x10 BSW 7/8″x9 BSW 15/16″x9 BSW 1″x8 BSW 1 1/8″x7 BSW
1 1/4″x7 BSW 1 3/8″x6 BSW 1 1/2″x6 BSW 1 5/8″x5 BSW 1 3/4″x5 BSW
1 7/8″x4.5 BSW 2″x4.5 BSW 2 1/8″x4.5 BSW 2 1/4″x4 BSW 2 3/8″x4 BSW
2 1/2″x4 BSW 2 5/8″x4 BSW 2 3/4″x3.5 BSW 2 7/8″x3.5 BSW 3″x3.5 BSW

 

The BSF is the Fine thread series of BS 84-Parallel Screw Threads of Whitworth Form.

We have as below BSF thread gauges

3⁄16″x32 BSF 1/4″x26 BSF 5⁄16″x22 BSF 3⁄8″x20 BSF 7⁄16″x18 BSF
1/2″x16 BSF 9⁄16″x16 BSF 5/8″x14 BSF 11/16″x14 BSF 3/4″x12 BSF
13/16″x12 BSF 7/8″x11 BSF 1″x10 BSF 1 1/8″x9 BSF 1 1/4″x9 BSF
1 3/8″x8 BSF 1 1/2″x8 BSF 1 5/8″x8 BSF 1 3/4″x8 BSF 1 7/8″x7 BSF
2″x7 BSF 2 1/4″x6 BSF 2 1/2″x6 BSF 2 3/4″x6 BSF 3″x5 BSF

 

Class of fit

Whitworth thread plug gauges: Medium and Normal

Whitworth thread ring gauges: Close, Medium and free

Tolerance classes: close class bolts.Applies to screw threads requiring a fine snug fit, and should be used only for special work where refined accuracy of pitch and thread form are particularly required. Medium Class bolts and nuts. Applies to the better class of ordinary interchangeable screw thread. Free Class bolts. Applies to the majority of bolts of ordinary commercial quality nuts; This class is intended for use with Medium or Free class bolts.

We also can produce special whitworth thread gauges according to clients’ special requirement.

We accept payment of T/T (bank transfer), Paypal, and Credit Card payment.

We usually send goods by express, DHL or UPS.

whitworth thread

Whitworth thread

H=0.960 491 P  H/6=0.160 082 P ;  h=0.640 327 P;   r= 0.137 329P

Whitworth thread’s British standard: BS 84:2007

Whitworth thread’s thread gauges standard: BS 912-2:2007

Whiworth thread standard was provided by Joseph Whitworth in 1841, it is the first thread standard in the world.

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