Material Material |
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For Use With For Use With |
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Maximum Pressure Maximum Pressure |
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Maximum Temperature Maximum Temperature |
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Connection Style Connection Style |
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 | Threaded |
Window Material Window Material |
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Gender Gender |
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Connection Type Connection Type |
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 | Pipe |
Seal Material Seal Material |
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Mount Type Mount Type |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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Minimum Temperature Minimum Temperature |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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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 | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/4 | 1/4" | 5/8" | 675 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/8 | 3/8" | 3/4" | 100 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 0000 |
| 3/8 | 3/8" | 3/4" | 415 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 100 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 0000 |
| 1/2 | 1/2" | 7/8" | 250 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/8" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/8" | 200 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 100 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/8" | 1 3/4" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/8" | 1 3/4" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 3/8" | 2" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 3/8" | 2" | 50 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 2 | 1 7/8" | 2 1/2" | 10 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 2 | 1 7/8" | 2 1/2" | 20 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 000000 |
BSPP Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 725 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 725 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 3/4 | 5/8" | 1 1/8" | 360 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 1 | 1" | 1 3/8" | 290 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | 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, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 725 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 5/8" | 1 1/8" | 360 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 290 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 3/4" | 180 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | 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, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/8 | 3/8" | 3/4" | 125 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 5/8" | 1" | 125 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1" | 125 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 100 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 3/4" | 50 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 1/2" | 2" | 50 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 2 | 2" | 2 1/2" | 50 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | 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 | Glass | Buna-N Rubber | __ | 0000000 | 0000 |
| 3/8 | 3/8" | 3/4" | 415 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 100 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 250 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/8" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1 1/8" | 200 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 100 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/8" | 1 3/4" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/8" | 1 3/4" | 60 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 3/8" | 2" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 3/8" | 2" | 50 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 2 | 1 7/8" | 2 1/2" | 10 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 000000 |
| 2 | 1 7/8" | 2 1/2" | 20 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid | Glass | Buna-N Rubber | __ | 0000000 | 000000 |
BSPP Male Thread | |||||||||||
| 3/8 | 3/8" | 3/4" | 725 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 725 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 3/4 | 5/8" | 1 1/8" | 360 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 000000 | 00000 |
| 1 | 1" | 1 3/8" | 290 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | 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, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 1/2" | 7/8" | 725 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 5/8" | 1 1/8" | 360 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 290 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 3/4" | 180 psi @ 70° F | -20° | 210° | Water, Hydraulic Fluid, Diesel Fuel | 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, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1/2 | 5/8" | 1" | 125 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 3/4 | 3/4" | 1" | 125 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 | 1" | 1 3/8" | 100 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 3/4" | 50 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 1 1/2 | 1 1/2" | 2" | 50 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | Glass | Buna-N Rubber | __ | 0000000 | 00000 |
| 2 | 2" | 2 1/2" | 50 psi @ 70° F | 0° | 225° | Water, Hydraulic Fluid, Diesel Fuel | 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 |