Stretchable Caps | McMaster-Carr

	For Shape For Shape


Round	Rectangle

Square

	Color Color

	Clear		White
	Black		Pink
	Blue		Green
	Yellow		Red

	Material Material

Plastic

Rubber

Fabric

	For Maximum OD For Maximum OD

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

DFARS Specialty Metals
COTS-Exempt

	Maximum Temperature Maximum Temperature

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

RoHS Compliant

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

REACH Compliant

	For Minimum OD For Minimum OD

	Bottom Opening Diameter Bottom Opening Diameter

	For Flange OD For Flange OD

	For Pail Shape For Pail Shape

Round

Square

	For Pail Capacity For Pail Capacity

	Thickness Thickness

4 mil

8 mil

	For Drum Capacity For Drum Capacity

66 Products

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. They are often used in masking applications to protect against contaminants.

Flexible Polyethylene Plastic
For OD	Max. Temp., °F	Color	Pkg. Qty.		Pkg.
1 1/2"-5"	150°	Clear	10	0000000	000000
1 1/2"-8"	150°	Clear	5	0000000	00000
2 1/4"-11"	150°	Clear	5	0000000	00000
2 7/8"-16"	150°	Clear	5	0000000	00000
3 5/8"-17"	150°	Clear	2	0000000	00000
4 3/8"-24"	150°	Clear	2	0000000	00000

Stretchable Sealing Caps

Tug on the pull tabs to stretch these caps onto the tips of bottles, beakers, flasks, and cylinders, creating an airtight seal. They’re flexible for a snug fit. Made of silicone, these caps withstand chemicals in high temperature applications up to 350° F, though they will swell if exposed to a solvent for too long. You can label and write on them with markers.

Flexible Silicone Rubber
For OD	Max. Temp.	Color	Pkg. Qty.		Pkg.
1 11/16"-2 3/8"	350° F	Blue	1	0000000	00000
1 11/16"-2 3/8"	350° F	Green	1	0000000	0000
1 11/16"-2 3/8"	350° F	Pink	1	0000000	0000
2 1/2"-3"	350° F	Blue	1	0000000	0000
2 1/2"-3"	350° F	Green	1	0000000	0000
2 1/2"-3"	350° F	Pink	1	0000000	0000
3 5/16"-4 9/16"	350° F	Blue	1	0000000	0000
3 5/16"-4 9/16"	350° F	Green	1	0000000	0000
3 5/16"-4 9/16"	350° F	Pink	1	0000000	0000

Stretchable Flange Caps

Stretch these caps over flared edges such as flanged tubing and valve handles. They are flexible for a snug fit.

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

For Flange					Black		Red		Yellow
OD	Thick.	Bottom Opening Dia.	Max. Temp., °F	Pkg. Qty.		Pkg.		Pkg.		Pkg.
Flexible Vinyl Plastic
1 5/16"	1/8"	5/8"	140°	10	000000	00	000000	00	0000000	00000
1 1/2"	1/8"	1"	140°	10	00000000	000000	000000	00	000000	00
1 5/8"	1/8"	1"	140°	10	000000	00	000000	00	0000000	00000
1 15/16"	1/8"	1 1/4"	140°	10	00000000	00000	000000	00	0000000	00000
2 3/16"	1/8"	1 1/2"	140°	10	0000000	00000	0000000	000000	0000000	00000
2 11/16"	1/8"	2"	140°	10	00000000	00000	00000000	00000	0000000	00000
2 7/8"	1/8"	2 1/8"	140°	10	00000000	00000	00000000	00000	0000000	00000
3 3/16"	1/8"	2 1/2"	140°	10	00000000	00000	00000000	00000	0000000	00000
3 9/16"	1/8"	3"	140°	10	00000000	00000	00000000	00000	0000000	00000
3 5/8"	1/8"	3"	140°	10	00000000	00000	00000000	00000	0000000	00000
4 5/32"	1/8"	3 1/2"	140°	10	00000000	00000	00000000	00000	0000000	0000
4 11/16"	1/8"	4"	140°	5	00000000	00000	00000000	00000	0000000	0000
4 15/16"	1/8"	4 1/4"	140°	5	00000000	00000	000000	00	00000000	00000
5 3/16"	1/8"	4 1/2"	140°	5	000000	00	000000	00	0000000	00000
5 11/16"	1/8"	5"	140°	1	000000	00	000000	00	0000000	0000
5 15/16"	1/8"	5 1/4"	140°	2	000000	00	000000	00	00000000	0000
6 3/16"	1/8"	5 1/2"	140°	2	000000	00	000000	00	00000000	00000
6 11/16"	1/8"	6"	140°	2	00000000	00000	000000	00	0000000	00000
7 3/16"	1/8"	6 1/2"	140°	2	00000000	00000	000000	00	0000000	00000

Disposable Earmuff and Headset Covers

Earmuffs Not Included

Swap these covers out after every use to keep shared earmuffs, headsets, and headphones germ-free without sterilizing them. Made of a hypoallergenic mesh fabric, they’re unlikely to irritate sensitive skin and won’t affect sound quality. An elastic band makes them easy to stretch over ear cups.

Material	Stretched Dia.	Color	Pkg. Qty.		Pkg.
Polyester Fabric	4 1/2"	White	100	0000000	000000

Antistatic Dust Caps for Pails

Cap is made with an additive that prevents static charge from building up on the surface.

Polyethylene Plastic
For Pail Shape (Capacity)	Color	Thick., mils	Max. Temp., °F	Surface Resistivity, ohms/sq	Pkg. Qty.		Pkg.
Round (3 1/2 gal., 5 gal., 6 gal.), Square (2 gal., 4 gal.)	Pink	4	175°	10¹¹	5	000000	000000

Dust Caps for Pails

Polyethylene Plastic
For Pail Shape (Capacity)	Color	Thick., mils	Max. Temp., °F	Pkg. Qty.		Pkg.
Round (1 gal.)	Clear	4	175°	5	0000000	000000
Round (2 gal.)	Clear	4	175°	5	0000000	00000
Round (3 1/2 gal., 5 gal., 6 gal.), Square (2 gal., 4 gal.)	Clear	4	175°	5	000000	00000

Antistatic Dust Caps for Drums

An additive on these polyethylene caps prevents static charge from building up on the surface.

Polyethylene Plastic
For Drum Capacity, gal.	Thick., mils	Color	Max. Temp., °F	Electrical Properties	Surface Resistivity, ohms/sq.	Pkg. Qty.		Pkg.
55	4	Pink	175°	Antistatic	10¹¹	5	000000	000000
30	4	Pink	175°	Antistatic	10¹¹	5	000000	00000

Dust Caps for Drums

PVC caps resist chemicals better than polyethylene caps.

PVC Plastic
For Drum Capacity, gal.	Thick., mils	Color	Max. Temp., °F	Pkg. Qty.		Pkg.
55	8	Semi-Clear White	Not Rated	1	000000	000000
55	8	Clear	Not Rated	1	000000	0000
Polyethylene Plastic
55	4	Clear	175°	5	000000	00000
30	4	Clear	175°	5	000000	00000

Tweezer Tip Covers

Cap the tips of your tweezers to protect them from damage. These flexible silicone covers fit most styles of tweezers.

Material	Overall Lg.	Pkg. Qty.		Pkg.
Silicone Rubber	1 1/4"	6	0000000	00000