Hex Head Covers | McMaster-Carr

	For Shape For Shape


Hex	Round

	Cap Type Cap Type


Snap On	Push On

Screw On

	For Nut Width For Nut Width

	Material Material

	Color Color

	Black		White
	Silver		Beige
	Dark Blue		Dark Brown
	Dark Green		Dark Red
	Light Brown		Light Gray
	Off-White

	For Thread Diameter For Thread Diameter

	Inside Height Inside Height

	Flexibility Flexibility

Flexible

Rigid

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Profile Profile


Straight	Tapered

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

REACH Compliant

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Maximum Temperature Maximum Temperature

	OD OD

	Thread Size Thread Size

	Thread Type Thread Type

UNC

UNF

	Head Diameter Head Diameter

42 Products

Hex Nut Caps

Sized to fit hex nuts, these caps snap on for a tight hold and provide protection from corrosion. Nut width is measured from flat-to-flat.

Rigid Plastic
For Nut Wd.	Inside Ht.	Max. Temp., °F	Color	Pkg. Qty.		Pkg.
7/16"	29/64"	170°	Black	10	0000000	00000
1/2"	17/32"	170°	Black	10	0000000	0000
35/64"	1/2"	170°	Black	10	0000000	0000
43/64"	25/32"	170°	Black	10	0000000	0000
3/4"	27/32"	170°	Black	10	0000000	00000
7/8"	15/16"	170°	Black	5	0000000	0000
15/16"	1"	170°	Black	5	0000000	00000
1 1/16"	1"	170°	Black	5	0000000	0000
1 1/4"	1 13/32"	170°	Black	5	0000000	00000
1 13/32"	1 7/16"	170°	Black	5	0000000	00000
1 5/8"	1 23/32"	170°	Black	1	0000000	0000
1 13/16"	2"	170°	Black	1	0000000	0000
1 31/32"	2 3/32"	170°	Black	1	0000000	00000
2 3/16"	2 19/64"	170°	Black	1	0000000	00000
2 3/8"	2 5/16"	170°	Black	1	0000000	00000
2 9/16"	2 19/64"	170°	Black	1	0000000	00000
2 3/4"	2 29/64"	170°	Black	1	0000000	00000

Screw Caps

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

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

Flexible Plastic
For Thread Dia.	Head Dia.	Max. Temp., °F	Color	Pkg. Qty.		Pkg.
For Socket Head Screws
1/4"	1/2"	150°	Semi-Clear White	100	0000000	000000
5/16"	0.59"	150°	Semi-Clear White	100	0000000	00000
3/8"	0.69"	150°	Semi-Clear White	100	0000000	00000
1/2"	0.88"	150°	Semi-Clear White	100	0000000	00000

Threaded Standoff Caps

Give open-ended standoffs a finished look and protect them from dirt and debris.

Stainless steel caps have excellent corrosion resistance, making them the best choice for harsh environments. They also have good chemical resistance.

Aluminum caps have good corrosion resistance, are lightweight, and are nonmagnetic.

Steel caps are stronger than aluminum.

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

Material	For Standoff OD	Ht.	Thread Lg.	Choose a Thread Size		Each
18-8 Stainless Steel	1/4"	1/4"	3/8"	4-40, 6-32, 8-32, 10-32	000000000	00000
Aluminum	1/4"	1/4"	3/8"	4-40, 6-32, 8-32, 10-32	000000000	0000
Zinc-Plated Steel	1/4"	1/4"	3/8"	4-40, 6-32, 8-32, 10-32	000000000	0000
Zinc-Plated Brass	1/4"	1/4"	3/8"	4-40, 6-32, 8-32, 10-32	000000000	0000

Snap-On Fastener Caps

To conceal and protect the entire screw head, insert your screw through the hole in the steel base and snap on the plastic top. The inside height listed is with the two parts snapped together.

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

Rigid Plastic
For Thread Dia.	Inside Ht.	OD	Choose a Color	Pkg. Qty.		Pkg.
No. 4	1/8"	1/2"	Black, White	25	000000000	000000
No. 6	1/8"	1/2"	Black, White	25	000000000	00000
No. 6, No. 8	13/64"	33/64"	Silver	25	000000000	00000
No. 8	7/32"	1/2"	Black, White	25	000000000	00000
No. 10	11/64"	23/32"	Black	25	000000000	0000
No. 10, No. 12, 1/4"	15/64"	41/64"	Silver	25	000000000	00000
No. 12	11/64"	23/32"	Black	25	000000000	0000
1/4"	5/16"	1 3/16"	Black, White	25	000000000	00000
5/16"	5/16"	1 3/16"	Black, White	25	000000000	00000
3/8"	5/16"	1 3/16"	Black, White	25	000000000	00000
7/16"	5/16"	1 3/16"	Black, White	25	000000000	00000
1/2"	5/16"	1 3/16"	Black, White	25	000000000	00000

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. All of these caps are UV-resistant. The inside height listed is with the two parts snapped together.

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

Rigid Plastic
For Thread Dia.	Inside Ht.	OD	Max. Temp., °F	Choose a Color	Pkg. Qty.		Pkg.
No. 4, No. 5, No. 6	3/32"	15/32"	250°	Black, White	100	000000000	00000
No. 6, No. 8, No. 10, M3, M5, M4	9/64"	9/16"	135°	Beige, Dark Blue, Dark Brown, Dark Green, Dark Red, Light Brown, Light Gray, Off-White, Silver	100	000000000	00000
No. 8, No. 10	7/64"	35/64"	250°	Black, White	100	000000000	00000
1/4"	5/32"	45/64"	250°	Black, White	100	000000000	00000
3/8"	19/64"	61/64"	250°	Black, White	100	000000000	00000