Plastic Thread Protector Caps

	Red
	Black
	Yellow
	Blue
	White
	Orange
	Clear
	Semi-Clear
	Beige
	Brown
	Dark Blue
	Dark Brown
	Dark Green
	Dark Red
	Gray
	Green
	Light Brown
	Light Gray
	Off-White
	Olive
	Pink
	Purple
	Silver
	Tan

	Profile Profile


Straight	Tapered

	Material Material

	Plug Type Plug Type


Screw In	Push In

Pull Through	Expandable

Snap In	Tamper Evident

	Inside Height Inside Height

	Maximum Temperature Maximum Temperature

	For ID For ID

0.025"-0.08"

1/32"-3/64"

1/32"-3/32"

1/32"-1/8"

3/64"-1/16"

3/64"-7/64"

3/64"-13/64"

0.05"-0.08"

1/16"

1/16"-5/64"

1/16"-11/64"

1/16"-13/64"

0.07"-0.11"

5/64"-1/16"

5/64"-7/64"

5/64"-1/8"

5/64"-11/64"

3/32"

0.1"-0.15"

7/64"-9/64"

0.116"-0.182"

1/8"

1/8"-1/2"

0.14"-0.21"

0.14"-0.275"

9/64"-3/16"

9/64"-15/64"

9/64"-23/64"

5/32"

5/32"-13/64"

0.16"-0.275"

3/16"

3/16"-1/4"

0.19"-0.3"

0.19"-0.32"

13/64"-9/32"

13/64"-21/64"

7/32"

7/32"-19/64"

0.22"-0.33"

0.22"-0.37"

0.236"-0.302"

0.24"-0.295"

1/4"

1/4"-7/16"

17/64"-5/16"

17/64"-23/64"

17/64"-3/8"

17/64"-27/64"

0.27"-0.4"

9/32"

9/32"-23/64"

9/32"-25/64"

0.29"

0.299"-0.365"

5/16"

21/64"-7/16"

21/64"-31/64"

21/64"-1/2"

0.33"-0.396"

11/32"

11/32"-3/8"

11/32"-15/32"

11/32"-1/2"

23/64"-29/64"

0.361"-0.418"

0.361"-0.427"

3/8"

3/8"-27/64"

0.39"

25/64"-19/32"

13/32"

13/32"-19/32"

0.419"-0.485"

27/64"-37/64"

7/16"

7/16"-35/64"

0.44"

29/64"-31/64"

29/64"-37/64"

29/64"-39/64"

29/64"-43/64"

15/32"

0.471"-0.536"

0.471"-0.547"

31/64"-35/64"

1/2"

1/2"-21/32"

0.51"

33/64"-19/32"

33/64"-41/64"

33/64"-45/64"

17/32"-39/64"

0.532"-0.608"

35/64"-41/64"

35/64"-3/4"

0.55"-0.631"

0.56"

9/16"

9/16"-5/8"

37/64"-11/16"

37/64"-47/64"

0.58"-0.667"

19/32"

19/32"-43/64"

19/32"-45/64"

39/64"

39/64"-23/32"

5/8"

5/8"-23/32"

0.64"-0.727"

41/64"-23/32"

41/64"-49/64"

41/64"-25/32"

41/64"-51/64"

21/32"

0.66"

43/64"-23/32"

43/64"-47/64"

43/64"-49/64"

11/16"

0.69"-0.788"

23/32"

23/32"-15/16"

47/64"-53/64"

47/64"-7/8"

47/64"-59/64"

3/4"

3/4"-0.848"

3/4"-1"

49/64"-57/64"

49/64"-29/32"

51/64"-15/16"

51/64"-31/32"

51/64"-1"

51/64"-1 1/64"

13/16"

0.82"

53/64"-31/32"

53/64"-63/64"

27/32"-1 7/32"

0.866"-0.975"

57/64"-31/32"

29/32"-1 1/16"

0.915"-1.04"

59/64"-1"

59/64"-1 3/64"

61/64"-1 1/64"

61/64"-1 3/64"

61/64"-1 5/64"

61/64"-1 3/32"

0.964"-1.09"

31/32"

63/64"-1 3/64"

1 1/32"

1 1/32"-1 1/4"

1.04"

1 3/64"-1 1/4"

1 1/16"-1 3/16"

1 1/16"-1 21/64"

1 5/64"-1 13/64"

1 5/64"-1 7/32"

1 5/64"-1 21/64"

1 3/32"

1.094"-1.215"

1 7/64"-1 19/64"

1 1/8"

1 1/8"-1 7/32"

1 9/64"-1 13/32"

1 5/32"

1.175"-1.284"

1 3/16"-1 7/16"

1 3/16"-1 29/64"

1 7/32"

1 7/32"-1 3/8"

1 15/64"-1 27/64"

1 15/64"-1 17/32"

1 1/4"-1 5/16"

1 17/64"-1 31/64"

1.29"

1 19/64"-1 1/2"

1.312"-1.465"

1 5/16"-1 39/64"

1 5/16"-1 5/8"

1 21/64"-1 35/64"

1 21/64"-1 9/16"

1 21/64"-1 19/32"

1 23/64"-1 9/16"

1 27/64"-1 11/16"

1 29/64"-1 5/8"

1 15/32"

1 15/32"-1 3/4"

1 15/32"-1 49/64"

1 31/64"-1 3/4"

1 1/2"-1 37/64"

1 1/2"-1 11/16"

1 1/2"-1 51/64"

1.513"-1.6"

1 33/64"-1 23/32"

1 17/32"-1 45/64"

1 35/64"-1 3/4"

1.56"-1.682"

1 41/64"-1 61/64"

1 21/32"-1 15/16"

1 21/32"-1 31/32"

1.7"

1 45/64"-1 29/32"

1 23/32"-1 59/64"

1 3/4"-1 13/16"

1 3/4"-1.88"

1.781"-1.805"

1 25/32"-2 5/64"

1 13/16"-2 1/64"

1 53/64"-2 1/32"

1.865"-1.975"

1 57/64"-2 3/16"

1 57/64"-2 13/64"

1 29/32"-2 9/64"

1 59/64"-2 5/32"

1 15/16"-2 5/32"

1 31/32"

1 31/32"-2 15/32"

1.975"-2.132"

1 63/64"-2 15/32"

2"-2 13/32"

2 1/64"-2 13/32"

2.067"-2.243"

2 9/64"-2 1/2"

2 9/64"-2 33/64"

2 5/32"-2 7/16"

2 11/64"-2 15/32"

2 3/16"-2 29/64"

2 7/32"-2 1/4"

2.23"-2.26"

2 19/64"-2 21/32"

2.298"-2.464"

2 5/16"-2 21/32"

2 21/64"-2 5/8"

2.395"-2.602"

2 29/64"-2 1/2"

2 29/64"-2 15/16"

2 29/64"-2 61/64"

2 15/32"-2 57/64"

2 31/64"-2 7/8"

2.614"-2.79"

2.849"-2.98"

2 61/64"-3 17/32"

2.975"-3.103"

3"-3 15/32"

3 1/64"-3 17/32"

3 3/64"-3 7/16"

3 17/64"-4 1/32"

3.27"-3.562"

3 9/32"-4 3/64"

3 19/64"-3 15/16"

3.325"-3.457"

3 11/32"-3 15/16"

3.47"-3.6"

3 33/64"-4 63/64"

3 35/64"-4 15/16"

3 35/64"-5"

3 19/32"-4 7/8"

3.79"-3.92"

4.02"-4.14"

4 3/64"-4 15/16"

4.27"-4.43"

4 19/64"-5 9/64"

4 51/64"-5 47/64"

4.99"-5.2"

5 3/64"-6 1/16"

6.4"-6.56"

7.97"-8.14"

	Flexibility Flexibility

Flexible

Rigid

	Height Height

	For Surface Type For Surface Type

Threaded

Unthreaded

	For Connection Type For Connection Type

	For Pipe Size For Pipe Size

1/16
1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6
8
10
12
14
16
18
20

	Hardness Hardness

	Thread Size Thread Size

	Thread Type Thread Type

	Head Width Head Width

	For Thread Diameter For Thread Diameter

	For Thread Type For Thread Type

NPT

BSPT

UN/UNF (SAE)

	For Inside Width For Inside Width

0.37"

0.37"-0.4"

0.46"-0.55"

0.59"-0.68"

0.6"-0.67"

0.62"

0.71"-0.8"

0.72"-0.84"

0.73"-0.83"

0.76"

0.83"

0.83"-0.93"

0.85"-0.92"

0.96"-1.05"

1.02"-1.1"

1.08"-1.18"

1.1"-1.17"

1.11"-1.2"

1.12"

1.21"-1.3"

1.23"-1.33"

1.26"

1.29"-1.34"

1.33"

1.33"-1.43"

1.35"-1.42"

1.37"

1.42"-1.5"

1.49"-1.58"

1.59"-1.68"

1.73"-1.83"

1.74"-1.83"

1.76"

1.83"

1.85"-1.92"

1.87"

1.99"-2.08"

2.09"-2.23"

2.24"-2.33"

2.37"-2.45"

2.42"-2.58"

2.49"-2.64"

2.59"-2.68"

2.76"-2.84"

3.15"-3.26"

3.33"-3.43"

3.44"-3.62"

3.78"-3.86"

4.48"-4.73"

5.48"-5.73"

View catalog pages (13)

Forward

How can we improve?

1,329 Products

Caps

Round Caps

Slide these flexible vinyl caps on and they conform for a snug fit.

Heavy Duty Round Caps

Made of rigid plastic, these caps are more wear resistant than vinyl caps but not as flexible.

Domed Round Caps

The large domed head extends beyond the diameter of your pipe, rod, or tubing for added protection.

Sure-Grip Round Caps

A long, textured pull tab provides a sure grip for quick removal even when wearing gloves.

Hanging Round Caps

Slide these caps over a tool handle or other round object and use the eye to hang it.

Tethered Round Caps

The tethered design allows frequent access to the ends of pipe, tubing, and other round objects without ever misplacing the cap.

Roll-Resistant Round Caps

Commonly used on shipping tubes, these caps have a square head to prevent round objects from rolling during shipping and storage.

Food-Grade Round Caps

Made of FDA listed materials, these caps are suitable for food contact.

Chemical-Resistant Round Caps

These caps have excellent chemical resistance for masking parts during chemical finishing applications such as plating and anodizing.

Conductive Round Caps

With a surface resistivity of less than 10⁵ ohms, these caps not only dissipate electrical charges, but can be used as an electrical shield.

Antistatic Round Caps

Keep equipment safe from electrical currents with these caps that have a surface resistivity of less than 10¹² ohms.

High-Temperature Round Caps

Good for electroplating, paint baking, and powder-coating applications, these caps withstand temperatures up to 440° F or 570° F.

Tapered Caps

These flexible plastic caps are tapered to fit a variety of unthreaded and threaded objects.

Tapered Cap Assortments

Keep tapered caps of various sizes on hand to solve whatever problems arise. These flexible plastic caps are tapered to fit a variety of unthreaded and threaded objects.

High-Temperature Tapered Caps

Made of silicone, these caps withstand temperatures of 450° F for electroplating, paint-baking, and powder-coating applications. All of these flexible caps are tapered to fit a variety of unthreaded and threaded objects.

Threaded Caps

Protect externally threaded components from contaminants during fabrication and storage.

Tear-Tab Caps

Push these caps onto pipe and fittings, then tear their tab to break the seal for easy removal.

Propane Tank Tear-Tab Caps

Designed for propane tanks such as those on forklifts and grills, these caps protect tank valves during storage and transit. Push the caps onto the valves, then tear their tab to break the seal for easy removal.

Flexible Pull-Tab Caps

Slide these flexible vinyl caps on and they conform for a snug fit. Pull the tab for easy removal.

High-Visibility Pull-Tab Caps

A vibrant yellow color makes these caps stand out. They are made of flexible rubber that conforms for a snug fit. Pull the tab for easy removal.

Rigid Pull-Tab Caps

Made of rigid plastic, these caps are more wear resistant than vinyl and rubber caps but not as flexible. Pull the tab for easy removal.

Stretchable Sealing Caps

Unroll these caps onto the tips of cartridges, spouts, and bottles for an airtight seal.

Stretchable Elastic Caps

Similar to a shower cap, these caps have an elastic band that allows them to stretch and cover a variety of shapes in a range of sizes.

Squeeze Top Caps

Squeeze the dome top to remove these caps. They're commonly used as thread protectors.

Heat-Shrink Round Caps

Permanently seal pipe, tubing, conduit, and even crimped electrical connections. Slide these flexible caps on and use a heat gun to tightly shrink them to the shape of whatever they are covering. Their outer surface shrinks while the inner wall flows into voids to create a sealed connection.

Fastener Caps

Hinged Fastener Caps

A one-piece hinged design allows frequent access to screw heads without misplacing the top. To conceal and protect the entire screw head, insert your screw through the hole in the base and flip the hinged top over.

Screw Caps

Conceal and protect the tops of socket head or button head screws.

Hex Nut Caps

Sized to fit hex nuts, these caps snap on for a tight hold and provide protection from corrosion.

Snap-On Fastener Caps

To conceal and protect the entire screw head, insert your screw through the hole in the base and snap on the top.

Adhesive-Back Flange Caps

Stick these caps on the raised surfaces of flanges or other flat surfaces for extra protection during transport and storage.

Rebar Caps

Keep personnel safe from protruding rebar and pipe. Made of rigid plastic, these durable safety caps are bright orange or yellow for excellent visibility.

Round Plugs

Threaded Round Plugs for NPT Pipe

Protect internally threaded NPT connections from contaminants during fabrication and storage.

High-Temperature Round
Plugs for NPT Pipe

These plugs withstand temperatures up to 600° F to protect internally threaded NPT connections from contaminants during electropainting, paint baking, and powder coating applications.

Threaded Round Plugs
for Straight-Thread Pipe

Seal tube and hose fittings to keep their straight threads protected from contaminants during fabrication and storage.

Threaded Round Plugs
for 37° Flared Tube

Designed to fit into 37° flared connections such as those found on JIC and SAE fittings, these plugs protect internally threaded connections from contaminants during fabrication and storage.

Threaded Round Plugs for BSPT Pipe

Safeguard internally threaded BSPT connections from contaminants during fabrication and storage.

Sealing Plugs

With a compressible flanged top, these plugs are designed to seal the ends of copper tubing often used in water supply lines, refrigerant lines, and HVAC compressors. All are sized to fit standard copper tube dimensions.

Conductive Round Plugs

With a surface resistivity of less than 10⁵ ohms, these plugs not only dissipate electrical charges, but can be used as an electrical shield.

Round Plugs

The hollow construction allows these plugs to compress for a snug fit in threaded and unthreaded holes.

Antistatic Round Plugs

Keep equipment safe from electrical currents with these plugs that have a surface resistivity of less than 10¹² ohms.

Miniature Pull-Through Round Plugs

Also known as mouse tails, these tiny plugs fit hole IDs as small as 0.025". They're commonly used for masking parts during finishing applications. Use the end of the plug to pull it into a through hole to form a tight seal.

Flanged Pull-Through Round Plugs

Designed with a flange, these plugs protect countersunk holes during anodizing, electroplating, paint baking, and powder-coating applications. All withstand temperatures up to 600° F. Use the smaller end of the plug to pull the larger end into a through hole to form a tight seal.

Chemical-Resistant
Pull-Through Round Plugs

These plugs have excellent chemical resistance for masking parts during chemical finishing applications such as plating and anodizing. Use the smaller end of the plug to pull the larger end into a through hole to form a tight seal.

High-Temperature
Pull-Through Round Plugs

Good for electroplating, paint baking, and powder-coating applications, these plugs withstand temperatures up to 600° F. To form a tight seal, use the smaller end of the plug to pull the larger end into a through hole.

Pull-Tab Round Plugs

A time-saving alternative to threaded plugs, these plugs press in place and have an ergonomic pull tab for quick and easy removal. Use them to temporarily protect holes in objects from contaminants during storage, painting, and light fabrication.

Tapered Plugs

Hollow Tapered Plugs

The hollow construction allows these plugs to compress for a snug fit in threaded and unthreaded holes of varying diameters.

Hollow Tapered Plug Assortments

Keep hollow tapered plugs of various sizes on hand to solve whatever problems arise. The hollow construction allows these plugs to compress for a snug fit in threaded and unthreaded holes of varying diameters.

High-Temperature Tapered Plugs

Good for electroplating, paint baking, and powder-coating applications, these plugs withstand temperatures up to 570° F. All are tapered to fit a range of hole diameters.

Expandable High-Temperature
Tapered Plugs

Place a plug into an opening and tighten the wing nut—the sides expand to create a seal in holes of varying diameters. Good for paint baking and powder-coating applications, these plugs withstand temperatures up to 450° F.

Expandable Tapered Plugs

Place a plug into an opening and tighten the wing nut—the sides expand to create a seal in holes of varying diameters.

Miniature Tapered Plugs

Sized to fit small openings, these tiny plugs fit snugly but can be removed easily using the flange. Their tapered design fits a range of hole diameters.

Miniature High-Temperature
Tapered Plugs

Sized to fit small openings, these tiny plugs fit snugly but can be removed easily using the flange. They withstand temperatures up to 470° F, which makes them good for electroplating, paint baking, and powder-coating applications. All are tapered to fit a range of hole diameters.

Tapered Plugs

Often used as laboratory stoppers, these rubber plugs have good impact and abrasion resistance. They’re tapered to fit a range of hole diameters.

Pull-Ring Tapered Plugs

Pull the two built-in rings to quickly remove these plugs. All are tapered to fit a range of hole diameters.

Hollow High-Temperature
Tapered Plugs

The hollow construction allows these plugs to compress for a snug fit in threaded and unthreaded holes of varying diameters. Good for electroplating, paint baking, and powder-coating applications, they withstand temperatures up to 450° F.

Tamper-Evident Tapered Plugs

Often used on gas cylinders, these plugs cinch and lock tightly around valve heads to block the ports—they must be cut off making it clear if the cylinder has been tampered with. The plugs are tapered to fit a range of hole diameters.

Chemical-Resistant Tapered Plugs

These plugs have excellent chemical resistance for masking parts during chemical finishing applications such as plating and anodizing. Their tapered design fits a range of hole diameters.

Food-Grade Tapered Plugs

Made of FDA listed materials, these plugs are suitable for food contact. They're tapered to fit a range of hole diameters.

Square Plugs

Snap-In Square Plugs

Flexible ridges or straps hold these plugs in place.

Push-In Square Plugs

Push these plugs into an opening and friction holds them in place.

Fixture Plate Chip Plugs

Keep chips and shavings from clogging or damaging unused holes on fixture plates in milling machines.

Terms and Conditions and Privacy Policy

Caps

Round Caps

Heavy Duty Round Caps

Domed Round Caps

Sure-Grip Round Caps

Hanging Round Caps

Tethered Round Caps

Roll-Resistant Round Caps

Food-Grade Round Caps

Chemical-Resistant Round Caps

Conductive Round Caps

Antistatic Round Caps

High-Temperature Round Caps

Tapered Caps

Tapered Cap Assortments

High-Temperature Tapered Caps

Threaded Caps

Tear-Tab Caps

Propane Tank Tear-Tab Caps

Flexible Pull-Tab Caps

High-Visibility Pull-Tab Caps

Rigid Pull-Tab Caps

Stretchable Sealing Caps

Stretchable Elastic Caps

Squeeze Top Caps

Heat-Shrink Round Caps

Fastener Caps

Hinged Fastener Caps

Screw Caps

Hex Nut Caps