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Sights
NPTF And NPT Threads For Clear Liquid
NPTF And NPT Threads For Dark Liquid
BSPP Threads For Clear Liquid
BSPP Threads For Dark Liquid
These sights have a glass window. Screw them into threaded holes on tanks, gear cases, bearing housings, and mixers to see inside.
Sights with BSPP (British Standard Pipe Parallel) threads are often used with imported equipment.
Sights for dark liquid have a reflector that makes liquid easy to see, especially in low-light conditions.
Aluminum sights have good corrosion resistance.
303 stainless steel sights are more corrosion resistant than brass, steel, and aluminum sights.
For technical drawings and 3-D models, click on a part number.
Temp. Range, °F | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Window Dia. | Hex Size | Max. Pressure | Min. | Max. | For Use With | Window Material | Seal Material | Features | Each | |
For Clear Liquid | |||||||||||
Brass | |||||||||||
NPTF Male Thread | |||||||||||
| 1/4 | 1/4" | 5/8" | 150 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 000000 |
| 1/4 | 1/4" | 5/8" | 675 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/8 | 3/8" | 3/4" | 100 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 0000 |
| 3/8 | 3/8" | 3/4" | 415 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 100 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 0000 |
| 1/2 | 1/2" | 7/8" | 250 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/8" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/8" | 200 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 100 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/8" | 1 3/4" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/8" | 1 3/4" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 3/8" | 2" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 3/8" | 2" | 50 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 2 | 1 7/8" | 2 1/2" | 10 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 2 | 1 7/8" | 2 1/2" | 20 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 000000 |
BSPP Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 725 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 725 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 3/4 | 5/8" | 1 1/8" | 360 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 1 | 1" | 1 3/8" | 290 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 000000 | 00000 |
Steel | |||||||||||
NPT Male Thread | |||||||||||
| 1/2 | 1/2" | 15/16" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 0000 |
| 1 | 1" | 1 3/8" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 3/4" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
| 1 1/2 | 1 1/2" | 2" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
| 2 | 2" | 2 1/2" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
NPTF Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/16" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
Aluminum | |||||||||||
BSPP Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 725 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 725 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 5/8" | 1 1/8" | 360 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 290 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 3/4" | 180 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
303 Stainless Steel | |||||||||||
NPT Male Thread | |||||||||||
| 1/4 | 1/4" | 5/8" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/8 | 3/8" | 3/4" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 5/8" | 1" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 100 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 3/4" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 1/2" | 2" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 2 | 2" | 2 1/2" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 000000 |
BSPP Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 725 psi @ 70° F | 0° | 350° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fluoroelastomer Rubber | __ | 000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 725 psi @ 70° F | 0° | 350° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fluoroelastomer Rubber | __ | 000000 | 00000 |
| 3/4 | 5/8" | 1 1/8" | 360 psi @ 70° F | 0° | 350° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fluoroelastomer Rubber | __ | 000000 | 00000 |
| 1 | 1" | 1 3/8" | 290 psi @ 70° F | 0° | 350° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fluoroelastomer Rubber | __ | 000000 | 00000 |
For Dark Liquid | |||||||||||
Brass | |||||||||||
NPTF Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 100 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 0000 |
| 3/8 | 3/8" | 3/4" | 415 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 100 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 250 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/8" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/8" | 200 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 100 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/8" | 1 3/4" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/8" | 1 3/4" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 3/8" | 2" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 3/8" | 2" | 50 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 2 | 1 7/8" | 2 1/2" | 10 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 2 | 1 7/8" | 2 1/2" | 20 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 000000 |
BSPP Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 725 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 725 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 3/4 | 5/8" | 1 1/8" | 360 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 1 | 1" | 1 3/8" | 290 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 000000 | 00000 |
Steel | |||||||||||
NPT Male Thread | |||||||||||
| 1/2 | 1/2" | 15/16" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 3/4" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
| 1 1/2 | 1 1/2" | 2" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
| 2 | 2" | 2 1/2" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
NPTF Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/16" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window | 0000000 | 00000 |
Aluminum | |||||||||||
BSPP Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 725 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 725 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 5/8" | 1 1/8" | 360 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 290 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 3/4" | 180 psi @ 70° F | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
303 Stainless Steel | |||||||||||
NPT Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 5/8" | 1" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 100 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 3/4" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 1/2" | 2" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 2 | 2" | 2 1/2" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | __ | 0000000 | 000000 |
BSPP Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 725 psi @ 70° F | 0° | 350° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fluoroelastomer Rubber | __ | 0000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 725 psi @ 70° F | 0° | 350° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fluoroelastomer Rubber | __ | 0000000 | 00000 |
| 3/4 | 5/8" | 1 1/8" | 360 psi @ 70° F | 0° | 350° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fluoroelastomer Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 290 psi @ 70° F | 0° | 350° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fluoroelastomer Rubber | __ | 0000000 | 00000 |
High-Visibility Sights
Easily view liquid movement and level changes from a distance—these sights have an indicator ball inside the glass window. They also have a reflector that makes dark liquid easy to see, especially in low-light conditions.
Brass sights have good corrosion resistance.
UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
Temp. Range, °F | For Dark Liquid | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Thread Size | Window Dia. | Hex Size | Max. Pressure | Min. | Max. | For Use With | Window Material | Seal Material | Features | Specifications Met | Each | |
Steel | |||||||||||||
NPT Male Thread | |||||||||||||
| 1/2 | __ | 1/2" | 1" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window, Indicator Ball | __ | 0000000 | 000000 |
| 1 | __ | 1" | 1 3/8" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window, Indicator Ball | __ | 0000000 | 00000 |
| 1 1/4 | __ | 1 1/4" | 1 3/4" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window, Indicator Ball | __ | 0000000 | 00000 |
| 1 1/2 | __ | 1 1/2" | 2" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window, Indicator Ball | __ | 0000000 | 00000 |
| 2 | __ | 2" | 2 1/2" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window, Indicator Ball | __ | 0000000 | 00000 |
NPTF Male Thread | |||||||||||||
| 3/8 | __ | 3/8" | 3/4" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window, Indicator Ball | __ | 0000000 | 00000 |
| 3/4 | __ | 3/4" | 1" | 125 psi @ 70° F | -40° | 250° | Water, Hydraulic Fluid, Diesel Fuel | Glass | __ | Fused Window, Indicator Ball | __ | 0000000 | 00000 |
UN/UNF (SAE Straight) Male Thread | |||||||||||||
| __ | 3/4"-16 | 9/16" | 7/8" | 75 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | SAE J1926/3 | 0000000 | 00000 |
| __ | 1 1/16"-12 | 3/4" | 1 1/4" | 75 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | SAE J1926/3 | 0000000 | 00000 |
| __ | 1 5/16"-12 | 15/16" | 1 1/2" | 75 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | SAE J1926/3 | 0000000 | 00000 |
| __ | 1 7/8"-12 | 1 7/16" | 2" | 20 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | SAE J1926/3 | 0000000 | 00000 |
Brass | |||||||||||||
NPTF Male Thread | |||||||||||||
| 3/8 | __ | 7/16" | 3/4" | 100 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 3/8 | __ | 7/16" | 3/4" | 415 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 1/2 | __ | 9/16" | 7/8" | 100 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 1/2 | __ | 9/16" | 7/8" | 250 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 3/4 | __ | 3/4" | 1 1/8" | 60 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 3/4 | __ | 3/4" | 1 1/8" | 200 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 1 | __ | 15/16" | 1 7/16" | 60 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 1 | __ | 15/16" | 1 7/16" | 100 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 1 1/4 | __ | 1 1/8" | 1 3/4" | 60 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 1 1/4 | __ | 1 3/16" | 1 3/4" | 25 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 1 1/2 | __ | 1 3/8" | 2" | 50 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 1 1/2 | __ | 1 7/16" | 2" | 25 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 00000 |
| 2 | __ | 1 7/8" | 2 1/2" | 10 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 000000 |
| 2 | __ | 1 7/8" | 2 1/2" | 20 psi @ 70° F | -40° | 180° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Indicator Ball | __ | 0000000 | 000000 |
Easy-View Sights
Zinc-Plated Steel
Plastic
View tank contents from multiple angles through the plastic domed window.
Zinc-plated steel sights have a shatter-resistant window.
Plastic sights have an impact-resistant window and brass threads.
For technical drawings and 3-D models, click on a part number.
Temp. Range, °F | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Window Dia. | Hex Size | Max. Pressure | Min. | Max. | For Use With | Window Material | Seal Material | Each | |
Zinc-Plated Steel | ||||||||||
NPT Male Thread | ||||||||||
| 3/4 | 1" | 1 1/4" | 10 psi @ 70° F | 0° | 160° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 000000 | 000000 |
| 1 | 1" | 1 1/2" | 10 psi @ 70° F | 0° | 160° | Water, Hydraulic Fluid, Diesel Fuel | Plastic | Neoprene Rubber | 000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 7/8" | 10 psi @ 70° F | 0° | 160° | Water, Hydraulic Fluid, Diesel Fuel | Plastic | Neoprene Rubber | 000000 | 00000 |
| 1 1/2 | 1 5/8" | 2 1/8" | 10 psi @ 70° F | 0° | 160° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 000000 | 00000 |
Plastic | ||||||||||
NPT Male Thread | ||||||||||
| 1/4 | 3/8" | __ | 65 psi @ 70° F | -40° | 180° | Hydraulic Fluid | Plastic | __ | 0000000 | 00000 |
| 3/8 | 1/2" | __ | 65 psi @ 70° F | -40° | 180° | Hydraulic Fluid | Plastic | __ | 0000000 | 00000 |
Easy-View All-Plastic Sights
Machined from one piece of stain- and impact-resistant plastic. They have a domed window so you can view tank contents from multiple angles.
For technical drawings and 3-D models, click on a part number.
Temp. Range, °F | ||||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Window Dia. | Max. Pressure | Min. | Max. | For Use With | Window Material | Each | |
Plastic | ||||||||
NPT Male Thread | ||||||||
| 1/2 | 7/8" | 65 psi @ 70° F | -40° | 180° | Hydraulic Fluid | Plastic | 0000000 | 000000 |
| 3/4 | 1 1/8" | 65 psi @ 70° F | -40° | 180° | Hydraulic Fluid | Plastic | 0000000 | 00000 |
| 1 | 1 3/8" | 65 psi @ 70° F | -40° | 180° | Hydraulic Fluid | Plastic | 0000000 | 00000 |
| 1 1/4 | 1 3/4" | 65 psi @ 70° F | -40° | 180° | Hydraulic Fluid | Plastic | 0000000 | 00000 |
| 1 1/2 | 2" | 65 psi @ 70° F | -40° | 180° | Hydraulic Fluid | Plastic | 0000000 | 00000 |
| 2 | 2 1/2" | 65 psi @ 70° F | -40° | 180° | Hydraulic Fluid | Plastic | 0000000 | 00000 |
Shatter-Resistant Sights
The window and body are made from a single piece of plastic, making these sights more shatter resistant than sights with a glass window. They are not rated for pressure.
For technical drawings and 3-D models, click on a part number.
Temp. Range, °F | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Thread Size | Window Dia. | Hex Size | Max. Pressure | Min. | Max. | For Use With | Window Material | Seal Material | Each | |
Plastic | |||||||||||
NPT Male Thread | |||||||||||
| 1/2 | __ | 1/2" | 1" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 0000000 | 00000 |
| 3/4 | __ | 5/8" | 1 1/4" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 0000000 | 0000 |
| 1 | __ | 7/8" | 1 1/2" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 0000000 | 00000 |
BSPP Male Thread | |||||||||||
| 1/4 | __ | 3/8" | 5/8" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 0000000 | 0000 |
| 3/8 | __ | 3/8" | 3/4" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 0000000 | 0000 |
| 1/2 | __ | 1/2" | 7/8" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 0000000 | 0000 |
| 3/4 | __ | 3/4" | 1" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 0000000 | 0000 |
| 1 | __ | 1" | 1 3/8" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 0000000 | 0000 |
| 1 1/4 | __ | 1 1/8" | 1 5/8" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 0000000 | 00000 |
Metric Male Thread | |||||||||||
| __ | M16 × 1.5 mm | 7/16" | 3/4" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 00000000 | 0000 |
| __ | M20 × 1.5 mm | 9/16" | 7/8" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 00000000 | 0000 |
| __ | M25 × 1.5 mm | 11/16" | 1 1/16" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 00000000 | 0000 |
| __ | M27 × 1.5 mm | 13/16" | 1 1/16" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 00000000 | 0000 |
| __ | M30 × 1.5 mm | 7/8" | 1 3/16" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 00000000 | 0000 |
| __ | M40 × 1.5 mm | 1 3/16" | 1 5/8" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 00000000 | 00000 |
UN/UNF (SAE Straight) Male Thread | |||||||||||
| __ | 1 1/16"-12 | 3/4" | 1 3/16" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 00000000 | 00000 |
| __ | 3/4"-16 | 1/2" | 7/8" | Not Rated | -20° | 210° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Plastic | Buna-N Rubber | 00000000 | 0000 |
Sights for Oil Inspection
Continuously monitor oil quality through the clear plastic reservoir and use the attached drain valve to remove water accumulation. Sights can be mounted vertically or horizontally. To mount vertically, install through a port on the bottom of your tank. There must be enough clearance for the sight to fit below the tank base. In areas with limited space under equipment, install one of these sights horizontally through a port on the side of your tank.
For technical drawings and 3-D models, click on a part number.
Temp. Range, °F | |||||||
|---|---|---|---|---|---|---|---|
| Pipe Size | Window Dia. | Reservoir Capacity, oz. | Max. Pressure | Min. | Max. | Each | |
Brass | |||||||
NPT Male Thread | |||||||
| 1/4 | 1 3/4" | 1 | 65 psi @ 70° F | 30° | 180° | 0000000 | 000000 |
| 1/4 | 2 1/2" | 3 | 65 psi @ 70° F | 30° | 180° | 0000000 | 00000 |
| 3/8 | 1 3/4" | 1 | 65 psi @ 70° F | 30° | 180° | 0000000 | 00000 |
| 3/8 | 2 1/2" | 3 | 65 psi @ 70° F | 30° | 180° | 0000000 | 00000 |
| 1/2 | 1 3/4" | 1 | 65 psi @ 70° F | 30° | 180° | 0000000 | 00000 |
| 1/2 | 2 1/2" | 3 | 65 psi @ 70° F | 30° | 180° | 0000000 | 00000 |
High-Pressure Sights
For Clear Liquid
For Dark Liquid
With a thick glass window fused to a metal body, these sights resist cracking at high pressures.
Sights for dark liquid have a reflector that makes liquid easy to see, especially in low-light conditions.
2205 stainless steel sights are more corrosion resistant than nickel-plated steel sights.
For technical drawings and 3-D models, click on a part number.
Temp. Range, °F | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Window Dia. | Hex Size | Max. Pressure | Min. | Max. | For Use With | Window Material | Features | Each | |
For Clear Liquid | ||||||||||
Nickel-Plated Steel | ||||||||||
NPT Male Thread | ||||||||||
| 1/4 | 3/8" | 5/8" | 2,000 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 000000 |
| 3/8 | 3/8" | 3/4" | 1,850 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 1/2 | 1/2" | 15/16" | 1,750 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/16" | 1,500 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 1,250 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 1 1/4 | 1 1/8" | 1 3/4" | 1,000 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 1 1/2 | 1 3/8" | 2" | 750 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 2 | 1 7/8" | 2 1/2" | 500 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
2205 Stainless Steel | ||||||||||
NPT Male Thread | ||||||||||
| 1/4 | 3/8" | 13/16" | 1,400 psi @ 70° F | -20° | 536° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 000000 |
| 1/2 | 1/2" | 1 1/16" | 1,400 psi @ 70° F | -20° | 536° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 000000 |
| 3/4 | 3/4" | 1 7/16" | 1,400 psi @ 70° F | -20° | 536° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 000000 |
| 1 | 7/8" | 1 5/8" | 1,400 psi @ 70° F | -20° | 536° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 000000 |
| 1 1/2 | 1 1/8" | 2 3/16" | 1,400 psi @ 70° F | -20° | 536° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 000000 |
| 2 | 1 3/8" | 2 3/4" | 1,400 psi @ 70° F | -20° | 536° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 000000 |
For Dark Liquid | ||||||||||
Nickel-Plated Steel | ||||||||||
NPT Male Thread | ||||||||||
| 3/8 | 3/8" | 3/4" | 1,850 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 1/2 | 1/2" | 15/16" | 1,750 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/16" | 1,500 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 1,250 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 1 1/4 | 1 1/8" | 1 3/4" | 1,000 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 1 1/2 | 1 3/8" | 2" | 750 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
| 2 | 1 7/8" | 2 1/2" | 500 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Fused Window | 0000000 | 00000 |
High-Temperature Sights
Often used in kilns and other heating equipment, these sights have a quartz window that can withstand temperatures up to 1600° F. They're also known as peep sights.
For technical drawings and 3-D models, click on a part number.
Temp. Range, °F | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Window Dia. | Hex Size | Max. Pressure | Min. | Max. | For Use With | Window Material | Each | |
316 Stainless Steel | |||||||||
NPT Male Thread | |||||||||
| 1/2 | 5/16" | 1" | 150 psi @ 1,600° F | Not Rated | 1600° | Steam | Quartz | 0000000 | 0000000 |
| 3/4 | 9/16" | 1 3/8" | 150 psi @ 1,600° F | Not Rated | 1600° | Steam | Quartz | 0000000 | 000000 |
| 1 | 11/16" | 1 5/8" | 150 psi @ 1,600° F | Not Rated | 1600° | Steam | Quartz | 0000000 | 000000 |
| 1 1/4 | 1 1/16" | 2" | 150 psi @ 1,600° F | Not Rated | 1600° | Steam | Quartz | 0000000 | 000000 |
| 1 1/2 | 1 1/4" | 2 1/4" | 150 psi @ 1,600° F | Not Rated | 1600° | Steam | Quartz | 0000000 | 000000 |
| 2 | 1 1/2" | 2 3/4" | 150 psi @ 1,600° F | Not Rated | 1600° | Steam | Quartz | 0000000 | 000000 |