Blue PTFE Coated Screws | McMaster-Carr

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	Finish Finish	Show

Blue PTFE Coated

	Finish Finish	Hide

	Material Material

Stainless Steel

Steel

	System of Measurement System of Measurement

Inch

	Thread Size Thread Size

	Length Length

	For Pipe Size For Pipe Size

	Threading Threading

Fully Threaded

Partially Threaded

	Head Type Head Type

	Hex

	Fastener Strength Grade/Class Fastener Strength Grade/Class

Grade B7

	Thread Spacing Thread Spacing

Coarse

	Thread Direction Thread Direction

	Right Hand

	Thread Type Thread Type

UNC

	Specifications Met Specifications Met

ASME

ASTM

	Hardness Hardness

Rockwell B80

Rockwell C32

Rockwell C35

	Drive Style Drive Style

	External Hex

	Thread Fit Thread Fit

Class 2A

Class 2B

	Tensile Strength Tensile Strength

80,000 psi

125,000 psi

	Nut Type Nut Type

Hex

	Head Width Head Width

15/16"

1 1/8"

1 5/16"

	Component Component

Nut

Screw

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

DFARS Specialty Metals
Compliant

DFARS Specialty Metals
COTS-Exempt

	Height Height

35/64"

41/64"

3/4"

	Width Width

15/16"

1 1/8"

1 5/16"

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62 Products

About Threaded Studs and Rods

About Hex Head Screws and Bolts

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.

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
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	000000
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

Medium-Strength Steel Threaded Rods—Grade B7

These Grade B7 threaded rods meet the pressure and temperature requirements of ASTM A193 and are often used to secure pressure tanks, valves, and flanges.

Blue PTFE-coated steel threaded rods are chemical resistant and have a slippery surface to thread on smoothly.

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

Blue PTFE-Coated Steel

1/4"-20
Lg.	Tensile Strength, psi	Hardness	Specifications Met		Each
1"	125,000	Rockwell C32	ASTM A193	000000000	00000
1 1/2"	125,000	Rockwell C32	ASTM A193	000000000	0000
2"	125,000	Rockwell C35	ASTM A193	000000000	0000
3"	125,000	Rockwell C35	ASTM A193	000000000	0000
4"	125,000	Rockwell C35	ASTM A193	000000000	0000
1ft.	125,000	Rockwell C35	ASTM A193	000000000	0000
3ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
5/16"-18
1 1/2"	125,000	Rockwell C32	ASTM A193	000000000	0000
2"	125,000	Rockwell C32	ASTM A193	000000000	0000
3"	125,000	Rockwell C35	ASTM A193	000000000	0000
4"	125,000	Rockwell C35	ASTM A193	000000000	0000
1ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
3ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
3/8"-16
1 1/2"	125,000	Rockwell C32	ASTM A193	000000000	0000
2"	125,000	Rockwell C35	ASTM A193	000000000	0000
3"	125,000	Rockwell C35	ASTM A193	000000000	0000
4"	125,000	Rockwell C35	ASTM A193	000000000	0000
1ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
3ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
1/2"-13
2"	125,000	Rockwell C35	ASTM A193	000000000	0000
2 1/2"	125,000	Rockwell C35	ASTM A193	000000000	0000
3"	125,000	Rockwell C35	ASTM A193	000000000	0000
4"	125,000	Rockwell C35	ASTM A193	000000000	0000
5"	125,000	Rockwell C35	ASTM A193	000000000	0000
6"	125,000	Rockwell C35	ASTM A193	000000000	0000
1ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
3ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
6ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
5/8"-11
3"	125,000	Rockwell C35	ASTM A193	000000000	0000
3 1/2"	125,000	Rockwell C35	ASTM A193	000000000	0000
4"	125,000	Rockwell C35	ASTM A193	000000000	0000
5"	125,000	Rockwell C35	ASTM A193	000000000	0000
6"	125,000	Rockwell C35	ASTM A193	000000000	0000
1ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
3ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
6ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
3/4"-10
3"	125,000	Rockwell C35	ASTM A193	000000000	0000
4"	125,000	Rockwell C32	ASTM A193	000000000	0000
4 1/2"	125,000	Rockwell C35	ASTM A193	000000000	0000
5"	125,000	Rockwell C35	ASTM A193	000000000	0000
6"	125,000	Rockwell C35	ASTM A193	000000000	0000
7"	125,000	Rockwell C35	ASTM A193	000000000	0000
8"	125,000	Rockwell C35	ASTM A193	000000000	00000
9"	125,000	Rockwell C35	ASTM A193	000000000	00000
1ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
3ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
6ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
7/8"-9
5"	125,000	Rockwell C35	ASTM A193	000000000	0000
6"	125,000	Rockwell C35	ASTM A193	000000000	0000
1ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
3ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
6ft.	125,000	Rockwell C35	ASTM A193	000000000	000000
1"-8
6"	125,000	Rockwell C35	ASTM A193	000000000	00000
7"	125,000	Rockwell C35	ASTM A193	000000000	00000
1ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
3ft.	125,000	Rockwell C35	ASTM A193	000000000	00000
6ft.	125,000	Rockwell C35	ASTM A193	000000000	000000

About Threaded Studs and Rods

About Hex Head Screws and Bolts

Stainless Steel Hex Screw and Nut Kits for Pipe Flanges

Medium-Strength Steel Threaded Rods—Grade B7