Precision Glass Works

Pressure Tube With Internal Thread And O-Rings

The Cap Along With O ring Assures a tight seal , by simply tightening the internal glassthreads and matching PTFE caps are available in 3 sizes i.e Small(Thread size #7),Regular(Thread size#15)and large (Thread size#25)

For pressure work, "Front Seal" cap is recommended. Back seal cap can be provided , if preferred.Back seal cap is currently available in the regular thread(#15)size only.


Caps are precisely machioned out of 25%Glass FILLED ptfe which os much superior to the regular PTFE.The Glass filled PTFE nwhich is much superior to the regular PTFE.The Glass filled PTFE has excellent chemical resistance, improved stifness and self lubricating .Resistance to weathering and wide operating temperature

  • For More Details on Different Sizes, Avialbility as well as Cost, please contact
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Pressure tubes, Front Seal

With Small(#7) size thread and cap

Approx volume,
ml		 Body O.D.,
mm		 Approx length
(below thread),
mm		 Pressure tube
with FKM O-ring
Product code		 Pressure tube
with FFKM O-ring
Product code		 Quanity Cart
5 13 100 P4541 P4571
10 19 100 P4542 P4572
10 13 175 P4543 P4573
15 19 175 P4544 P4574

Pressure tubes, Front Seal

With Regular(#15) size thread and cap

Approx volume,
ml		 Body O.D.,
mm		 Approx length
(below thread),
mm		 Pressure tube
with FKM O-ring
Product code		 Pressure tube
with FFKM O-ring
Product code		 Quanity Cart
15 26 100 P4545 P4575
30 26 175 P4546 P4576
60 26 300 P4547 P4577
60 38 100 P4548 P4578
120 38 175 P4549 P4579
200 38 300 P4550 P4580

Pressure tubes, Front Seal

With Large(#25) size thread and cap

Approx volume,
ml		 Body O.D.,
mm		 Approx length
(below thread),
mm		 Pressure tube
with FKM O-ring
Product code		 Pressure tube
with FFKM O-ring
Product code		 Quanity Cart
60 38 100 P4551 P4581
120 38 175 P4552 P4582
120 46 100 P4553 P4583
250 46 175 P4554 P4584

Pressure tubes, Back Seal

With Regular(#15) size thread and cap

Approx volume,
ml		 Body O.D.,
mm		 Approx length
(below thread),
mm		 Pressure tube
with FKM O-ring
Product code		 Pressure tube
with FFKM O-ring
Product code		 Quanity Cart
15 26 100 P4555 P4585
30 26 175 P4556 P4586
60 26 300 P4557 P4587
60 38 100 P4558 P4588
120 38 175 P4559 P4589
200 38 300 P4560 P4590

Replacement O-ring

Front seal

O-ring size FKM O-ring
Product code		 FFKM O-ring
Product code		 Quanity Cart
For Small(#7)thread and cap P4561 P4591
For Regular(#15)thread and cap P4562 P4592
For Regular(#25)thread and cap P4563 P4593

Replacement O-ring

Back seal

O-ring size FKM O-ring
Product code		 FFKM O-ring
Product code		 Quanity Cart
For Regular(#15)thread and cap P4564 P4594