Threads in diving regulators etc, o-ring sizes

[АлександрД]

Sp21.8х1.81-А - German oxygen thread. Used on mini tanks in Europe and Russia
W19.2, W19.8 - Thin cone thread in tanks
NPSM 3/4-14 - Imperial tank thread
G1/4-19 - very popular thread in Russia for many connections in military rebreathers and old scuba.
DIN - 5 turns (200 bar) or 7 turns (300 bar) - pipe thread G 5/8"-14 (DIN 477 part 1 (200 bar), DIN 477 part 5 (300 bar))
G 3/4-14 - Russian transport tanks
UNF 3/8-24 - regulator to hose thread for IP
UNF 5/8-18 - thread for Spareair or paintball tanks
UNF 7/16-20 - HP thread in regulator or SPG (Surface Pressure Gaufe)
UNF 9/16-18 - Thread between 2nd stage and hose
BSW 1/4-20 (Withworth 1/4") - or 3/8" - Camera tripod thread
М14х1 - Aqualung Cousteau Yoke/DIN connector thread
М16х1 - Interspiro AGA Divator thread for 2nd stage
М16х1 - thread for oxygen sensors. Equal to 5/8-24 UNEF
Ed40x3,5 - for some gas masks (Edisson thread, rounded)
I removed from here threads for soviet equipment. If you like - you can find it here: Резьбы и О-ринги: Клуб любителей экзотического дайвинга: Подводный форум больных дайвингом.
===========================================================
International Thread Standards - MANY threads tables
ANSI B 1.20.1 - NPT - American National Standard Taper Pipe Threads
https://www.swagelok.com/downloads/webcatalogs/en/MS-13-77.pdf

Valve threads
Valves & Neck Threads | Dive Gear Express®
Specialty gases cylinder outlets | HiQ
===========================================================
Sizing -- Society of Automotive Engineers AS568B is an Aerospace Standard that specifies sizes for O-rings used in sealing applications. An AS568B number is a three-digit suffix that identifies the O-ring's size. Technically, an O-ring size is listed as AS568B-016, AS568B-112, etc., but most people use just the three-digit number. The first digit denotes the O-ring cross section width: 0xx = 1/16-inch, 1xx = 3/32-inch, 2xx = 1/8-inch....

AS568B- Outside Diameter SCUBA Application Seal
214 1-1/4____Cylinder with Large Neck/Valve (3/4 NPS - All Aluminum, most Steel cylinders)
116 15/16____Cylinder with Small Neck/Valve (7/8 UNF - "Genesis" 3500 psi Steel cylinders)
112 11/16____Standard DIN Regulator/Valve (Nearly all DIN regulators)
111 5/8______Small DIN Regulator/Valve (You know if you need this one)
015 11/16____Cylinder Valve Bonnet Nut
014 5/8______Standard Yoke Regulator/K-valve
013 9/16_____Large Low-Pressure Port/Hose (1/2 UNF)
012 1/2______High-Pressure Port/Hose (7/16 UNF) Manifold and Manifold Port Plugs
011 7/16_____Standard Low-Pressure Port/Hose (3/8 UNF)
010 3/8______Low-Pressure Hose/2nd Stage Regulator Cylinder Valve Stem
006 1/4______BC Power Inflator
003 3/16_____High-Pressure Hose/SPG swivel


Apeks O-rings
This table lists the O-Rings used for servicing Apeks regulators for the following models:
* First stages: US4, DS4, UST, DST, FST(ATX100), FSR(ATX200)
* Second stages: T20, TX40/50/100/200, AT20, ATX40/50/100/200
Apeks ID BS Cross Sectn. Inner diam. SCUBA Application Seal
- 003 1/16 1/16 High-Pressure Hose/SPG swivel
AP6403 004 1/16 5/64 High-Pressure Hose/SPG swivel (less common)
AP1299 006 1/16 1/8 Apeks HP seat (1st stage)
AP1154 010 1/16 1/4 Low-Pressure Hose/2nd Stage Regulator, Cylinder Valve Stem, Apeks crown (2nd stage)
AP1409 011 1/16 5/16 Standard Low-Pressure Port/Hose (3/8 UNF), Apeks adjusting screw (2nd stage), Apeks conical filter (1st Stage), Apeks FSR HP crown (1st stage), Power Inflator quick disconnect oring
AP1445 012 1/16 3/8 High-Pressure Port/Hose (7/16 UNF), Manifold and Manifold Port Plugs
AP1410 013 1/16 7/16 Large Low-Pressure Port/Hose (1/2 UNF), Apeks balance plug inner (1st stage)
AP1159 014 1/16 1/2 Standard Yoke Regulator/K-valve, Apeks ATX adjuster screw (2nd stage)
AP1267 015 1/16 9/16 Apeks value spindle (2nd stage), Cylinder Valve Bonnet Nut
AP1438 019 1/16 13/16 Apeks Venturi (2nd stage), Apeks turret bolt (1st stage)
AP1420 024 1/16 1-1/8 Apeks Turret (1st stage)
AP1166 111 3/32 7/16 Apeks DIN Regulator/Valve, Apeks Yoke spare (2nd stage), Note:Yoke valves often use BS112 or BS014
- 214 1/8 1 Cylinder with Large Neck/Valve, (3/4 NPS - All Aluminum, most Steel cylinders)
AP2041 2x1 (606) 1mm 2mm Apeks shuttle valve (2nd stage)
AP5711 2.5x1 (607) 1mm 2.5mm Apeks ATX adjuster screw nib (2nd stage)
AP1300 15x1.5 1.5mm 15mm Apeks HP balance plug outer (1st stage)
- 006 2.9mm 1.78mm Power Inflator spindle (Polyurethane)
- 012 1/16 3/8 Power Inflator cylinder inner oring (Buna)
- 112 3/32 1/2 Power Inflator cylinder outer oring (Buna)
- 204 1/8 3/8 Power Inflator oral inflate oring (Buna)

http://www.parker.com/literature/O-Ring Division Literature/ORD 5700 Parker_O-Ring_Handbook.pdf

standard AS 568 (same BS 1806, same BS ISO 3601-1)
https://www.jameswalker.biz/de/pdf_docs/3-o-ring-guide - one of the best o-ring guides. Also has compare between metric and imperial systems.

http://www.divegearexpress.com/hardware/orings.shtml - kinds of rubber or plastic for o-rings

 

[Scubagaskets]

Sp21.8х1.81-А - German oxygen thread. Used on mini tanks in Europe and Russia
W19.2, W19.8 - Thin cone thread in tanks
NPSM 3/4-14 - Imperial tank thread
G1/4-19 - very popular thread in Russia for many connections in military rebreathers and old scuba.
DIN - 5 turns (200 bar) or 7 turns (300 bar) - pipe thread G 5/8"-14 (DIN 477 part 1 (200 bar), DIN 477 part 5 (300 bar))
G 3/4-14 - Russian transport tanks
UNF 3/8-24 - regulator to hose thread for IP
UNF 5/8-18 - thread for Spareair or paintball tanks
UNF 7/16-20 - HP thread in regulator or SPG (Surface Pressure Gaufe)
UNF 9/16-18 - Thread between 2nd stage and hose
BSW 1/4-20 (Withworth 1/4") - or 3/8" - Camera tripod thread
М14х1 - Aqualung Cousteau Yoke/DIN connector thread
М16х1 - Interspiro AGA Divator thread for 2nd stage
М16х1 - thread for oxygen sensors. Equal to 5/8-24 UNEF
Ed40x3,5 - for some gas masks (Edisson thread, rounded)
I removed from here threads for soviet equipment. If you like - you can find it here: Резьбы и О-ринги: Клуб любителей экзотического дайвинга: Подводный форум больных дайвингом.
===========================================================
International Thread Standards - MANY threads tables
ANSI B 1.20.1 - NPT - American National Standard Taper Pipe Threads
https://www.swagelok.com/downloads/webcatalogs/en/MS-13-77.pdf

Valve threads
Valves & Neck Threads | Dive Gear Express®
Specialty gases cylinder outlets | HiQ
===========================================================
Sizing -- Society of Automotive Engineers AS568B is an Aerospace Standard that specifies sizes for O-rings used in sealing applications. An AS568B number is a three-digit suffix that identifies the O-ring's size. Technically, an O-ring size is listed as AS568B-016, AS568B-112, etc., but most people use just the three-digit number. The first digit denotes the O-ring cross section width: 0xx = 1/16-inch, 1xx = 3/32-inch, 2xx = 1/8-inch....

AS568B- Outside Diameter SCUBA Application Seal
214 1-1/4____Cylinder with Large Neck/Valve (3/4 NPS - All Aluminum, most Steel cylinders)
116 15/16____Cylinder with Small Neck/Valve (7/8 UNF - "Genesis" 3500 psi Steel cylinders)
112 11/16____Standard DIN Regulator/Valve (Nearly all DIN regulators)
111 5/8______Small DIN Regulator/Valve (You know if you need this one)
015 11/16____Cylinder Valve Bonnet Nut
014 5/8______Standard Yoke Regulator/K-valve
013 9/16_____Large Low-Pressure Port/Hose (1/2 UNF)
012 1/2______High-Pressure Port/Hose (7/16 UNF) Manifold and Manifold Port Plugs
011 7/16_____Standard Low-Pressure Port/Hose (3/8 UNF)
010 3/8______Low-Pressure Hose/2nd Stage Regulator Cylinder Valve Stem
006 1/4______BC Power Inflator
003 3/16_____High-Pressure Hose/SPG swivel


Apeks O-rings
This table lists the O-Rings used for servicing Apeks regulators for the following models:
* First stages: US4, DS4, UST, DST, FST(ATX100), FSR(ATX200)
* Second stages: T20, TX40/50/100/200, AT20, ATX40/50/100/200
Apeks ID BS Cross Sectn. Inner diam. SCUBA Application Seal
- 003 1/16 1/16 High-Pressure Hose/SPG swivel
AP6403 004 1/16 5/64 High-Pressure Hose/SPG swivel (less common)
AP1299 006 1/16 1/8 Apeks HP seat (1st stage)
AP1154 010 1/16 1/4 Low-Pressure Hose/2nd Stage Regulator, Cylinder Valve Stem, Apeks crown (2nd stage)
AP1409 011 1/16 5/16 Standard Low-Pressure Port/Hose (3/8 UNF), Apeks adjusting screw (2nd stage), Apeks conical filter (1st Stage), Apeks FSR HP crown (1st stage), Power Inflator quick disconnect oring
AP1445 012 1/16 3/8 High-Pressure Port/Hose (7/16 UNF), Manifold and Manifold Port Plugs
AP1410 013 1/16 7/16 Large Low-Pressure Port/Hose (1/2 UNF), Apeks balance plug inner (1st stage)
AP1159 014 1/16 1/2 Standard Yoke Regulator/K-valve, Apeks ATX adjuster screw (2nd stage)
AP1267 015 1/16 9/16 Apeks value spindle (2nd stage), Cylinder Valve Bonnet Nut
AP1438 019 1/16 13/16 Apeks Venturi (2nd stage), Apeks turret bolt (1st stage)
AP1420 024 1/16 1-1/8 Apeks Turret (1st stage)
AP1166 111 3/32 7/16 Apeks DIN Regulator/Valve, Apeks Yoke spare (2nd stage), Note:Yoke valves often use BS112 or BS014
- 214 1/8 1 Cylinder with Large Neck/Valve, (3/4 NPS - All Aluminum, most Steel cylinders)
AP2041 2x1 (606) 1mm 2mm Apeks shuttle valve (2nd stage)
AP5711 2.5x1 (607) 1mm 2.5mm Apeks ATX adjuster screw nib (2nd stage)
AP1300 15x1.5 1.5mm 15mm Apeks HP balance plug outer (1st stage)
- 006 2.9mm 1.78mm Power Inflator spindle (Polyurethane)
- 012 1/16 3/8 Power Inflator cylinder inner oring (Buna)
- 112 3/32 1/2 Power Inflator cylinder outer oring (Buna)
- 204 1/8 3/8 Power Inflator oral inflate oring (Buna)

http://www.parker.com/literature/O-Ring Division Literature/ORD 5700 Parker_O-Ring_Handbook.pdf

standard AS 568 (same BS 1806, same BS ISO 3601-1)
https://www.jameswalker.biz/de/pdf_docs/3-o-ring-guide - one of the best o-ring guides. Also has compare between metric and imperial systems.

http://www.divegearexpress.com/hardware/orings.shtml - kinds of rubber or plastic for o-rings

 

[Scubagaskets]

O-rings for scuba diving - EPDM - NBR - VITON - POLYURETHANE

 

[taimen]

Can we expand this thread with a list of scuba equipment tool sizes.

What are the wrench and hex key sizes used in common regulators, hoses tanks etc.?

 

[АлександрД]

I`m not moderator of this forum Shure, this thread for everybody. When somebody can add more usefull and normalized information - it should be good.
About wrenches: Two common wrenches for most applications:
one:

another:

Can be purchased in any car service shops.

Most of all another wrenches is special tools, manufacturer specific.

But also exists two, very usefull, and fitted to most popular equipment:
Bladder Flange Tool - to install exaust valve seat for BCD.

That kind of seats: (three right positions)

how to use - is here (use translator)

another wrench for many kinds of 1st stages ODS

also is one popular wrench for many popular inflator control buttons: Inflator Service Tool w/O-Ring Kit

what else?

 

[Umuntu]

Can we expand this thread with a list of scuba equipment tool sizes.

What are the wrench and hex key sizes used in common regulators, hoses tanks etc.?

There's a wide variation in wrench and hex sizes, with both metric and imperial in use depending on which part of the world you live in. For metric, I keep a set of open spanners from 12 to 19mm. But there are other sizes for particular applications depending on the regs you have.

Most of the hex spanners required are metric, but I keep a set of imperial just in case. I find for hex applications it's really important to have exactly the right size, otherwise you just round out the brass hole.

The back of the service manual for most regulators has a table showing their recommended tools.

 

[АлександрД]

O-Rings 101, Understand the seal-eology - O-rings theory and practice

 

[Couv]

@АлександрД
Do you per chance know the thread size for a ScubaPro second stage orifice?

TIA,

Couv

 

[herman]

Pretty sure it's 5/16-32 Couv. Most of them are.

 

[Couv]

Thanks Herman.