1/16 Caps | McMaster-Carr

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	Thread Type Thread Type

	Type Type

	Cap		Plug

	Material Material

	Drive Style Drive Style


External Hex	Hex

	System of Measurement System of Measurement

Inch

	Length Length

	For Use With For Use With

	Maximum Pressure Maximum Pressure

	Connection Style Connection Style

Threaded

	Shape Shape

	Cap/Plug

	Gender Gender

Female

Male

	For Pipe Material For Pipe Material

Stainless Steel

Steel

Aluminum

	Size Size

5/32"

5/16"

3/8"

	Connection Type Connection Type

	Pipe

	Fabrication Fabrication

Machined

Forged

	Maximum Steam Pressure Maximum Steam Pressure

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	Specifications Met Specifications Met

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Body Shape Body Shape

	Hex

	Body Material Body Material

Brass

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23 Products

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

How to Measure Threaded Pipe Size

Low-Pressure Stainless Steel Threaded Pipe Fittings

Use these fittings in a low-pressure pipe line. 316 stainless steel fittings have excellent corrosion resistance.

NPTF (Dryseal) threads and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.

For technical drawings and 3-D models, click on a part number.

Plugs with Hex Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure Class:
NPTF: 150
Specifications Met:
Metric and BSPP: DIN 908
Pipe Nipples and Pipe:
NPTF: Use Schedule 40 stainless steel
Flanges:
NPTF: Use Class 150 stainless steel

				302 Stainless Steel		316 Stainless Steel
Pipe Size	Drive Size	Max. Pressure	Max. Steam Pressure		Each		Each
NPTF Male
1/16	5/32"	270 psi @ 72° F	180 psi @ 360° F	00000000	00000	00000000	00000

Precision Extreme-Pressure Stainless Steel Threaded Pipe Fittings

Made to tighter tolerances than other stainless steel pipe fittings, these are also known as instrumentation fittings. The male threads are rolled for extra strength in extreme-pressure applications. Fittings are commonly used to connect equipment in gas and hydraulic fluid lines. They are 316 stainless steel for excellent corrosion resistance.

For technical drawings and 3-D models, click on a part number.

Caps

For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3

			316 Stainless Steel
Pipe Size	Max. Pressure	Max. Steam Pressure		Each
NPT Female
1/16	7,500 psi @ 72° F	7,500 psi @ 300° F	000000000	000000

Plugs with Hex Drive

For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
Specifications Met:
1/2 Pipe Size: ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A182, ASTM A276, ASTM A479
All other sizes: ASME B1.20.1, ASME B31.1, ASME B31.3

				316 Stainless Steel
Pipe Size	Drive Size	Max. Pressure	Max. Steam Pressure		Each
NPT Male
1/16	5/32"	10,000 psi @ 72° F	10,000 psi @ 300° F	000000000	000000

Plugs with External Hex Drive

For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
Specifications Met:
NPT: ASME B1.20.1, ASME B31.1, ASME B31.3
BSPT: ISO 7-1

				316 Stainless Steel
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure		Each
NPT Male
1/16	Hollow	10,000 psi @ 72° F	10,000 psi @ 300° F	000000000	00000

High-Pressure Stainless Steel Threaded Pipe Fittings

Use these heavy duty fittings in high-pressure flow applications.

347 stainless steel fittings have excellent corrosion resistance and can withstand prolonged heat exposure.

For technical drawings and 3-D models, click on a part number.

Plugs with Hex Drive

For Use With: Air, Natural Gas, Oil, Steam, Water
Specifications Met: MS27769, SAE AS4842, SAE AS71051

				347 Stainless Steel
Pipe Size	Drive Size	Max. Pressure	Max. Steam Pressure		Each
NPT Male
1/16	5/32"	3,000 psi @ 72° F	600 psi @ 220° F	0000000	00000

Miniature Medium-Pressure Stainless Steel Threaded Pipe Fittings

When space is at a premium choose these compact fittings. Though small in size, they have the strength to handle medium-pressure applications. Fittings are stainless steel for very good corrosion resistance.

Metric, BSPP, and UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. Made from fluoroelastomer, these gaskets resist chemicals, including benzene, butyl alcohol, and ethylene glycol. 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.

Plugs with External Hex Drive

BSPP, Metric, and
UN/UNF (SAE Straight)
Male Threads with Gasket

For Use With: Air, Natural Gas, Oil, Steam, Water
Specifications Met: ASTM A314, ASTM A320, ASTM A582

					303 Stainless Steel		316 Stainless Steel
Pipe Size	Drive Size	Max. Pressure	Max. Steam Pressure	Gasket Material		Each		Each
NPT Male
1/16	5/16"	500 psi @ 72° F	100 psi @ 350° F	__	00000000	00000	00000000	000000
BSPP Male
1/16	5/16"	500 psi @ 72° F	100 psi @ 350° F	Fluoroelastomer Rubber	00000000	00000	00000000	00000
BSPT Male
1/16	5/16"	500 psi @ 72° F	100 psi @ 350° F	__	00000000	0000	00000000	00000

Low-Pressure Galvanized Steel Threaded Pipe Fittings with Sealant

The male threads on these fittings have a sealant applied for extra leak protection. Fittings are made of galvanized steel, which has fair corrosion resistance. Also known as Pressure Class 150 fittings, they are for use in low-pressure applications.

NPTF (Dryseal) threads are compatible with NPT threads.

For technical drawings and 3-D models, click on a part number.

Plugs with Hex Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure Class: 150
Specifications Met: SAE J531
Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
Flanges: Use Class 150 galvanized steel

NPTF Male
Pipe Size	Drive Size	Max. Pressure	Max. Steam Pressure		Each
1/16	5/32"	Not Rated	Not Rated	0000000	00000

Compact Extreme-Pressure Steel Threaded Pipe Fittings

These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized steel, which has fair corrosion resistance.

NPTF (Dryseal) threads are compatible with NPT threads.

For technical drawings and 3-D models, click on a part number.

Plugs with Hex Drive

For Use With:
NPTF and UN/UNF (SAE Straight): Air, Hydraulic Fluid, Water
Metric, BSPP and BSPT: Air, Hydraulic Fluid, Oil, Water
Specifications Met: See table

NPTF Male
Pipe Size	Drive Size	Max. Pressure	Specifications Met		Each
1/16	5/32"	6,000 psi @ 72° F	ASTM A108	000000000	00000

Compact Precision Extreme-Pressure Steel Threaded Pipe Fittings

Made to tighter tolerances than other steel pipe fittings, these are also known as instrumentation fittings. They are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized steel, which has fair corrosion resistance.

For technical drawings and 3-D models, click on a part number.

Plugs with External Hex Drive

For Use With: Air, Natural Gas, Water, Hydraulic Fluid
Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A108

NPT Male
Pipe Size	Max. Pressure		Each
1/16	10,000 psi @ 72° F	00000000	000000

Extreme-Pressure Steel Threaded Pipe Fittings

The strongest steel fittings we offer, these can withstand extreme-pressure applications. PTFE-coated steel fittings have better corrosion resistance than galvanized and zinc-plated steel fittings.

Plugs with a 7/8" taper sit flush to the surface for a low profile.

NPTF (Dryseal) threads are compatible with NPT threads.

For technical drawings and 3-D models, click on a part number.

Plugs with Hex Drive and 7/8" Taper

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Temperature Range: -100° to 450° F
Specifications Met: ASTM A574, ASME B1.20.3
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

		Steel		PTFE-Coated Steel
Pipe Size	Max. Pressure		Each	Color		Each
NPTF Male
1/16	5,000 psi @ 72° F	0000000	00000	Blue	0000000	00000

High-Pressure Brass Threaded Pipe Fittings

These fittings have the strength to handle high-pressure applications. They are brass for good corrosion resistance.

For technical drawings and 3-D models, click on a part number.

Plugs with Hex Drive

For Use With: Air, Natural Gas, Oil, Water

NPT Male
Pipe Size	Drive Size	Max. Pressure		Each
1/16	5/32"	1,000 psi @ 72° F	000000000	00000

High-Pressure Brass Threaded Pipe Fittings with Sealant

Not only do these fittings have the strength to handle high-pressure applications, the male threads have a sealant applied for extra protection against leaks. Fittings are brass for good corrosion resistance.

For technical drawings and 3-D models, click on a part number.

Plugs with Hex Drive

For Use With: Air, Natural Gas, Oil, Water

NPT Male
Pipe Size	Drive Size	Max. Pressure		Each
1/16	5/32"	1,000 psi @ 72° F	000000000	00000

Low-Pressure Aluminum Threaded Pipe Fittings

In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications. To prevent cracking, do not tighten more than a 1/4-turn past hand tight.

For technical drawings and 3-D models, click on a part number.

Plugs with Hex Drive

For Use With: Air, Water, Hydraulic Fluid
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM B221, Fed. Spec. QQ-A-200/8
Pressure Class: 150
Pipe Nipples and Pipe: Use Schedule 80 aluminum

				Black Anodized 2011 Aluminum
Pipe Size	Drive Size	Plug Construction	Max. Pressure		Each
NPT Male
1/16	5/32"	Solid	150 psi @ 72° F	00000000	00000

Plugs with External Hex Drive

For Use With: Air, Water, Hydraulic Fluid
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM B221, Fed. Spec. QQ-A-200/8
Pressure Class: 150
Pipe Nipples and Pipe: Use Schedule 80 aluminum

NPT Male
Pressure Class	Pipe Size	Drive Size	Plug Construction	Max. Pressure		Each
150	1/16	5/16"	Solid	150 psi @ 72° F	00000000	00000

Plastic Pipe Fittings for Oil

Made of corrosion-resistant plastic, these fittings won’t deteriorate when used in oil applications. They also have high strength and impact resistance. Apply a non-hardening, plastic-compatible sealant to the male threads to prevent leaks. Tape or sealants with PTFE are not recommended for plastic-to-plastic threaded connections. When making a threaded connection be careful not to overtighten the threads. To prevent cracks and leaks, finger tighten the fitting, then wrench-tighten one to two turns.

Warning: Never use plastic pipe fittings and pipe with compressed air or gas.

For technical drawings and 3-D models, click on a part number.

Plugs with External Hex Drive, Male Threaded Pipe

For Use With: Oil
Temperature Range: See table

NPT Threads
Pipe Size	Drive Size	Material	Color	Max. Pressure	Minimum Temperature, °F	Maximum Temperature, °F		Each
1/16	5/16"	PVDF Plastic	White	Not Rated	Not Rated	Not Rated	0000000	00000

Breather Vents

Protect against excess vacuum and pressure in cylinders, gear boxes, enclosures, manifolds, and tanks. You can also use these breather vents to block debris from entering equipment.

For technical drawings and 3-D models, click on a part number.

NPT Male
Style	Pipe Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	For Use With	Removes Particle Size Down To, microns		Each
Brass Body and Fitting
A	1/16	13 scfm @ 100 psi	150	300°	1/2"	Air, Inert Gas	90	0000000	00000