Cap Screw Assortments | McMaster-Carr

	Head Type Head Type

	System of Measurement System of Measurement

Metric

Inch

	Drive Style Drive Style


Hex	External Hex

	Finish Finish

Black Oxide

Zinc Plated

Blue PTFE Coated

Zinc Yellow-Chromate Plated

	Material Material

Steel

Stainless Steel

	Number of Pieces Number of Pieces

30
120
151
170
210
240
258
288

300
400
420
425
465
575
600
765

880
910
1,000
1,020
1,058
1,300
2,295

	Container Type Container Type

Plastic Box

Metal Box

Metal Drawer Cabinet

	Specifications Met Specifications Met

	Container Length Container Length

	Container Depth Container Depth

	Container Features Container Features

Compartmented

Lid Chart

	Container Width Container Width

	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

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

DFARS Specialty Metals
COTS-Exempt

	Fastener Strength Grade/Class Fastener Strength Grade/Class

	Thread Size Thread Size

	Length Length

	For Pipe Size For Pipe Size

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

	Threading Threading

Partially Threaded

Fully Threaded

	Head Width Head Width

	Component Component

Nut

Screw

	Thread Fit Thread Fit

81 Products

About Hex Head Screws and Bolts

Length is measured from under the head.

Black-oxide alloy steel screws resist corrosion in dry environments.

Zinc-plated alloy steel screws resist corrosion in wet environments.

18-8 stainless steel screws are chemical resistant and may be mildly magnetic.

316 stainless steel screws are more corrosion resistant to chemicals and saltwater than 18-8 stainless steel screws and may be mildly magnetic.

Inch
Number of Pieces	Screw Sizes Included	Specifications Met	Container Type		Each
Black-Oxide Alloy Steel
170	6-32 to 3/8"-16 in 1/2" to 1 1/2" Lengths	ASTM A574	Plastic Box	000000000	000000
400	6-32 to 5/16"-24 in 1/4" to 1 3/4" Lengths	ASTM A574	Plastic Box	000000000	000000
Zinc-Plated Alloy Steel
170	6-32 to 3/8"-16 in 1/2" to 1 1/2" Lengths	ASTM A574	Plastic Box	000000000	000000
400	6-32 to 5/16"-18 in 1/4" to 1 1/2" Lengths	ASTM A574	Plastic Box	000000000	000000
18-8 Stainless Steel
300	4-40 to 1/4"-20 in 1/4" to 1" Lengths	__	Plastic Box	000000000	00000
1,300	4-40 to 3/8"-16 in 1/4" to 1 1/2" Lengths	__	Metal Box	000000000	000000
316 Stainless Steel
120	6-32 to 3/8"-16 in 1/2" to 1 1/2" Lengths	__	Plastic Box	000000000	000000
Metric
Black-Oxide Class 12.9 Alloy Steel
120	M3 to M8 in 10 mm to 35 mm Lengths	DIN 912, ISO 4762	Plastic Box	000000000	00000
210	M3 to M10 in 10 mm to 35 mm Lengths	DIN 912, ISO 4762	Plastic Box	000000000	00000
425	M5 to M12 in 16 mm to 60 mm Lengths	DIN 912, ISO 4762	Metal Box	000000000	000000
600	M5 to M10 in 16 mm to 40 mm Lengths	DIN 912, ISO 4762	Metal Box	000000000	000000
765	M4 to M12 in 10 mm to 60 mm Lengths	DIN 912, ISO 4762	Metal Box	000000000	000000
880	M4 to M10 in 10 mm to 40 mm Lengths	DIN 912, ISO 4762	Metal Box	000000000	000000
1,058	M4 to M8 in 10 mm to 40 mm Lengths	DIN 912, ISO 4762	Metal Box	000000000	000000
18-8 Stainless Steel
240	M2 to M10 in 8 mm to 30 mm Lengths	DIN 912	Plastic Box	000000000	00000
288	M6 to M12 in 16 mm to 60 mm Lengths	DIN 911, DIN 912, ISO 2936, ISO 4762	Metal Box	000000000	000000
425	M5 to M12 in 16 mm to 60 mm Lengths	DIN 912, ISO 4762	Metal Box	000000000	000000
765	M4 to M12 in 10 mm to 60 mm Lengths	DIN 912, ISO 4762	Metal Box	000000000	000000
1,000	M2 to M5 in 4 mm to 25 mm Lengths	DIN 912, ISO 4762	Metal Box	000000000	000000

Hex-Drive Rounded Head Screw Assortments

These assortments include button head screws. Length is measured from under the head.

Black-oxide alloy steel screws resist corrosion in dry environments.

18-8 stainless steel screws are chemical resistant and may be mildly magnetic.

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

Inch
Number of Pieces	Screw Sizes Included	Specifications Met	Container Type		Each
Black-Oxide Alloy Steel
300	6-32 to 5/16"-18 in 3/8" to 1" Lengths	ASTM F835	Plastic Box	000000000	000000
18-8 Stainless Steel
300	4-40 to 1/4"-20 in 1/4" to 1" Lengths	ASTM F835	Plastic Box	000000000	00000
Metric
Black-Oxide Class 10.9 Alloy Steel
258	M4 to M8 in 8 mm to 40 mm Lengths	ISO 7380	Plastic Box	000000000	00000
18-8 Stainless Steel
300	M3 to M8 in 8 mm to 30 mm Lengths	ISO 7380	Plastic Box	000000000	00000

Hex Head Screw Assortments

These assortments include hex head screws and hex nuts. Length is measured from under the head.

Grade 5 and Class 8.8 steel screws are suitable for fastening most machinery and equipment. Zinc-plated steel screws resist corrosion in wet environments.

Grade 8 and Class 10.9 steel screws are about 25% stronger than Grade 5 and Class 8.8 steel screws. Zinc yellow-chromate plated steel screws are more corrosion resistant than zinc-plated screws in wet environments.

18-8 stainless steel screws are chemical resistant and may be mildly magnetic.

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

Inch
Number of Pieces	Includes	Specifications Met	Container Type		Each
Zinc-Plated Grade 5 Steel
910	285 Hex Head Screws (1/4"-20 to 3/8"-16 in 1/2" to 2" Lengths) 125 Hex Nuts (1/4"-20 to 3/8"-16) 250 Flat Washers (For 1/4" to 3/8" Screw Sizes) 250 Lock Washers (For 1/4" to 3/8" Screw Sizes)	__	Metal Box	000000000	0000000
910	285 Hex Head Screws (1/4"-28 to 3/8"-24 in 1/2" to 2" Lengths) 125 Hex Nuts (1/4"-28 to 3/8"-24) 250 Flat Washers (For 1/4" to 3/8" Screw Sizes) 250 Lock Washers (For 1/4" to 3/8" Screw Sizes)	__	Metal Box	000000000	000000
1,020	315 Hex Head Screws (1/4"-20 to 1/2"-13 in 3/4" to 3" Lengths) 155 Hex Nuts (1/4"-20 to 1/2"-13) 325 Flat Washers (For 1/4" to 1/2" Screw Sizes) 225 Lock Washers (For 1/4" to 1/2" Screw Sizes)	__	Metal Drawer Cabinet	000000000	000000
Zinc Yellow-Chromate Plated Grade 8 Steel
910	285 Hex Head Screws (1/4"-20 to 3/8"-16 in 1/2" to 2" Lengths) 125 Hex Nuts (1/4"-20 to 3/8"-16) 250 Flat Washers (For 1/4" to 3/8" Screw Sizes) 250 Lock Washers (For 1/4" to 3/8" Screw Sizes)	__	Metal Box	000000000	000000
910	285 Hex Head Screws (1/4"-28 to 3/8"-24 in 1/2" to 2" Lengths) 125 Hex Nuts (1/4"-28 to 3/8"-24) 250 Flat Washers (For 1/4" to 3/8" Screw Sizes) 250 Lock Washers (For 1/4" to 3/8" Screw Sizes)	__	Metal Box	000000000	000000
18-8 Stainless Steel
420	220 Hex Head Screws (1/4"-20 to 3/8"-16 in 1/2" to 2 1/2" Lengths) 55 Hex Nuts (1/4"-20 to 3/8"-16) 55 Flat Washers (For 1/4" to 3/8" Screw Sizes) 90 Lock Washers (For 1/4" to 3/8" Screw Sizes)	__	Metal Box	000000000	000000
Metric
Class 8.8 Steel
2,295	765 Hex Head Screws (M4 to M12 in 10 mm to 60 mm Lengths) 765 Hex Nuts (M4 to M12) 765 Lock Washers (For M4 to M12 Screw Sizes)	DIN 933, DIN 934, DIN 127B	Metal Box and Plastic Box	000000000	000000
Zinc-Plated Class 8.8 Steel
465	315 Hex Head Screws (M4 to M10 in 12 mm to 50 mm Lengths) 150 Hex Nuts (M4 to M10)	DIN 933, DIN 934	Plastic Box	000000000	000000
2,295	765 Hex Head Screws (M4 to M12 in 10 mm to 60 mm Lengths) 765 Hex Nuts (M4 to M12) 765 Lock Washers (For M4 to M12 Screw Sizes)	DIN 933, DIN 934, DIN 127B	Metal Box and Plastic Box	000000000	000000
Class 10.9 Steel
575	165 Hex Head Screws (M6 to M12 in 16 mm to 40 mm Lengths) 165 Hex Nuts (M6 to M12) 245 Lock Washers (For M6 to M12 Screw Sizes)	DIN 933	Metal Box	000000000	000000

Flat Head Screw Assortments

Flat head screws are angled under the head to fit flush within countersunk holes. Length is measured from the top of the head.

Black-oxide alloy steel screws resist corrosion in dry environments.

18-8 stainless steel screws are chemical resistant and may be mildly magnetic.

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

Inch
Number of Pieces	Screw Sizes Included	Specifications Met	Container Type		Each
Black-Oxide Alloy Steel
300	6-32 to 5/16"-18 in 3/8" to 1" Lengths	ASTM F835	Plastic Box	000000000	000000
18-8 Stainless Steel
300	6-32 to 5/16"-18 in 3/8" to 1" Lengths	__	Plastic Box	000000000	00000
Metric
Black-Oxide Class 10.9 Alloy Steel
258	M4 to M8 in 10 mm to 40 mm Lengths	DIN 7991	Plastic Box	000000000	00000
18-8 Stainless Steel
300	M3 to M8 in 6 mm to 25 mm Lengths	DIN 7991	Plastic Box	000000000	00000

Stainless Steel Hex Screw and Nut Kits for Pipe Flanges

Stainless Steel

Stainless Steel with Blue PTFE-Coated Nuts

Use these kits to connect standard-size stainless steel pipe flanges for ANSI Class 150 or 300. They meet ASTM specifications for material quality, and the dimensions meet ASME specifications. Length of screws is measured from under the head.

18-8 stainless steel kits have good chemical resistance and may be mildly magnetic.

316 stainless steel kits are more corrosion resistant than 18-8 stainless steel and have excellent resistance to chemicals and salt water. They may be mildly magnetic. Some kits have blue PTFE-coated nuts. This coating is slippery, chemical-resistant, and prevents galling. It also helps nuts thread smoothly.

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

	Screw						Nut
For Pipe Size	Lg.	Min. Thread Lg.	Head Wd.	Head Ht.	Tensile Strength, psi	Specifications Met	Wd.	Ht.	Specifications Met	For Max. Pressure		Each
18-8 Stainless Steel for Class 150 Stainless Steel Flanges
1/2"-13
1/2, 3/4, 1	1 3/4"	1 1/4"	3/4"	5/16"	80,000	ASME B18.2.1, ASTM F593	3/4"	7/16"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
1 1/4, 1 1/2	2 1/4"	1 1/4"	3/4"	5/16"	80,000	ASME B18.2.1, ASTM F593	3/4"	7/16"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	0000
5/8"-11
2 1/2, 3	3"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
2	2 3/4"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
4	3"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
3/4"-10
6	3 1/4"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
8	3 1/2"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
7/8"-9
10	3 3/4"	2"	1 5/16"	35/64"	80,000	ASME B18.2.1, ASTM F593	1 5/16"	3/4"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	000000
12	4"	2"	1 5/16"	35/64"	80,000	ASME B18.2.1, ASTM F593	1 5/16"	3/4"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	000000
18-8 Stainless Steel for Class 300 Stainless Steel Flanges
5/8"-11
1, 1 1/4	2 1/2"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
2	3"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
3/4"-10
1 1/2	3"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
3, 3 1/2	3 1/2"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
4	3 3/4"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
5	4"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
6	4"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
7/8"-9
8	4 1/2"	2"	1 5/16"	35/64"	80,000	ASME B18.2.1, ASTM F593	1 5/16"	3/4"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	000000
1"-8
10	5 1/2"	2 1/4"	1 1/2"	39/64"	80,000	ASME B18.2.1, ASTM F593	1 1/2"	55/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	000000
316 Stainless Steel for Class 150 Stainless Steel Flanges
5/8"-11
2	2 3/4"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
3	3"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
4	3"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
3/4"-10
6	3 1/4"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
8	3 1/2"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
7/8"-9
10	3 3/4"	2"	1 5/16"	35/64"	80,000	ASME B18.2.1, ASTM F593	1 5/16"	3/4"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	000000
12	4"	2"	1 5/16"	35/64"	80,000	ASME B18.2.1, ASTM F593	1 5/16"	3/4"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	000000
316 Stainless Steel with Blue-PTFE-Coated Nuts for Class 150 Stainless Steel Flanges
5/8"-11
3	3"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
4	3"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
3/4"-10
6	3 1/4"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
8	3 1/2"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	00000
7/8"-9
12	4"	2"	1 5/16"	35/64"	80,000	ASME B18.2.1, ASTM F593	1 5/16"	3/4"	ASME B18.2.2, ASTM F594	270 psi @ 72° F	000000000	000000
316 Stainless Steel for Class 300 Stainless Steel Flanges
5/8"-11
1, 1 1/4	2 1/2"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
2	3"	1 1/2"	15/16"	13/32"	80,000	ASME B18.2.1, ASTM F593	15/16"	35/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
3/4"-10
1 1/2	3"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
3, 3 1/2	3 1/2"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
4	3 3/4"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
5	4"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000
6	4"	1 3/4"	1 1/8"	15/32"	80,000	ASME B18.2.1, ASTM F593	1 1/8"	41/64"	ASME B18.2.2, ASTM F594	720 psi @ 72° F	000000000	00000

Fastener Kits for Enclosures

Mount components to your enclosure without worrying about leaks—these kits seal out water from washdowns, rain, and snow when used with enclosures rated NEMA 4X. They’re made of stainless steel, so they won’t corrode in outdoor or corrosive environments.

Thread Size	Length	For Enclosure Environmental Rating	Material	Seal Material	For Hole Size	Required Installation Torque, in.-lbs.	Number of Pieces	Includes	Specifications Met		Each
8-32	1/2"	NEMA 4X, NEMA 12	18-8 Stainless Steel	Neoprene	0.177"	__	151	Rounded Head Screws (50 Pieces) Sealing Washers (50 Pieces) Nylon-Insert Locknuts (50 Pieces) L-Key (1 Piece)	UL Listed, CSA Certified	0000000	000000
8-32	1"	NEMA 4X, NEMA 12	18-8 Stainless Steel	Neoprene	0.177"	__	151	Rounded Head Screws (50 Pieces) Sealing Washers (50 Pieces) Nylon-Insert Locknuts (50 Pieces) L-Key (1 Piece)	UL Listed, CSA Certified	0000000	00000
10-32	1/2"	NEMA 4X, NEMA 12	18-8 Stainless Steel	Neoprene	0.201"	__	151	Rounded Head Screws (50 Pieces) Sealing Washers (50 Pieces) Nylon-Insert Locknuts (50 Pieces) L-Key (1 Piece)	UL Listed, CSA Certified	0000000	00000
10-32	1"	NEMA 4X, NEMA 12	18-8 Stainless Steel	Neoprene	0.201"	__	151	Rounded Head Screws (50 Pieces) Sealing Washers (50 Pieces) Nylon-Insert Locknuts (50 Pieces) L-Key (1 Piece)	UL Listed, CSA Certified	0000000	00000
1/4"-20	5/8"	NEMA 4X, NEMA 12	18-8 Stainless Steel	Neoprene	0.266"	__	151	Rounded Head Screws (50 Pieces) Sealing Washers (50 Pieces) Nylon-Insert Locknuts (50 Pieces) L-Key (1 Piece)	UL Listed, CSA Certified	0000000	00000
1/4"-20	1"	NEMA 4X, NEMA 12	18-8 Stainless Steel	Neoprene	0.266"	__	151	Rounded Head Screws (50 Pieces) Sealing Washers (50 Pieces) Nylon-Insert Locknuts (50 Pieces) L-Key (1 Piece)	UL Listed, CSA Certified	0000000	00000
3/8"-16	1"	NEMA 4X, NEMA 13	18-8 Stainless Steel	Neoprene	13/32"	150	30	Hex Head Screws (10 Pieces) Sealing Washers (10 Pieces) External-Tooth Locknuts (10 Pieces)	UL Recognized Component, CSA Certified	0000000	00000

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About Hex Head Screws and Bolts

Socket Head Screw Assortments

Hex-Drive Rounded Head Screw Assortments

Hex Head Screw Assortments

Flat Head Screw Assortments

Stainless Steel Hex Screw and Nut Kits for Pipe Flanges

Fastener Kits for Enclosures