PTFE-Coated Machine Screws

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Stainless Steel Phillips Flat Head Screws

These screws are made of stainless steel, so they won't rust or corrode when exposed to moisture and chemicals. The Phillips drive has a cross-shaped opening in which a driver fits snugly for easy alignment. With four contact points, they withstand more torque than slotted drives, but drivers slip when you apply too much force.

Length is measured from the top of the head.

PTFE-Coated 18-8 Stainless Steel—A slippery PTFE coating prevents these screws from binding or sticking during installation. They resist rust in wet and outdoor environments and can handle occasional exposure to mild acids and chemicals without corroding.

Standard Profile—Standard-profile heads are the most common choice for flat head screws.

Undercut Profile—About a third thinner than standard heads, the undercut profile fits into shallow holes in thin material. The thin head also has more threading on the shaft, so they're often used to keep short screws from coming loose.

				Head
	Lg.	Countersink Angle	Flat Head Profile	Dia.	Ht.	Threading	Tensile Strength, psi	Pkg. Qty.		Pkg.
PTFE-Coated 18-8 Stainless Steel







				6-32

				1/4"	82°	Standard	0.262"	0.083"	Fully Threaded	80,000	50	96653A109	000000


				3/8"	82°	Standard	0.262"	0.083"	Fully Threaded	80,000	50	96653A112	00000
				1/2"	82°	Standard	0.262"	0.083"	Fully Threaded	80,000	50	96653A115	00000
				3/4"	82°	Standard	0.262"	0.083"	Fully Threaded	80,000	50	96653A118	00000




						8-32

						1/4"	82°	Undercut	0.312"	0.1"	Fully Threaded	80,000	50	96653A149	00000


						3/8"	82°	Standard	0.312"	0.1"	Fully Threaded	80,000	50	96653A152	00000
						1/2"	82°	Standard	0.312"	0.1"	Fully Threaded	80,000	50	96653A155	00000
						3/4"	82°	Standard	0.312"	0.1"	Fully Threaded	80,000	50	96653A158	00000




								10-32

								3/8"	82°	Standard	0.362"	0.116"	Fully Threaded	80,000	50	96653A179	00000


								1/2"	82°	Standard	0.362"	0.116"	Fully Threaded	80,000	50	96653A182	00000
								3/4"	82°	Standard	0.362"	0.116"	Fully Threaded	80,000	50	96653A185	00000
								1"	82°	Standard	0.362"	0.116"	Fully Threaded	80,000	25	96653A188	00000




										1/4"-20

										3/8"	82°	Undercut	0.477"	0.153"	Fully Threaded	80,000	25	96653A249	00000


										1/2"	82°	Standard	0.477"	0.153"	Fully Threaded	80,000	25	96653A252	00000
										3/4"	82°	Standard	0.477"	0.153"	Fully Threaded	80,000	25	96653A255	00000
										1"	82°	Standard	0.477"	0.153"	Fully Threaded	80,000	10	96653A258	0000
										1 1/2"	82°	Standard	0.477"	0.153"	Fully Threaded	80,000	10	96653A261	00000

Stainless Steel Pan Head Phillips Screws

These stainless steel pan head Phillips screws won't rust or corrode when exposed to moisture and chemicals. They have a moderate height and width profile, offering a middle ground between narrower button heads and wider truss heads. The Phillips drive easily aligns with drivers and withstands more torque than slotted drives, but drivers slip when you apply too much force.

Length is measured from under the head.

PTFE-Coated 18-8 Stainless Steel—A slippery PTFE coating keeps these screws from binding or sticking during installation. They won't rust in wet and outdoor environments and can handle occasional exposure to mild acids and chemicals without corroding.

		Head
	Lg.	Dia.	Ht.	Threading	Tensile Strength, psi	Pkg. Qty.		Pkg.
PTFE-Coated 18-8 Stainless Steel







				6-32

				1/4"	0.27"	0.097"	Fully Threaded	70,000	50	95233A110	000000


				3/8"	0.27"	0.097"	Fully Threaded	70,000	50	95233A113	00000
				1/2"	0.27"	0.097"	Fully Threaded	70,000	50	95233A117	00000
				3/4"	0.27"	0.097"	Fully Threaded	70,000	50	95233A120	00000




						8-32

						1/4"	0.322"	0.115"	Fully Threaded	70,000	50	95233A150	0000


						3/8"	0.322"	0.115"	Fully Threaded	70,000	50	95233A153	00000
						1/2"	0.322"	0.115"	Fully Threaded	70,000	50	95233A156	00000
						3/4"	0.322"	0.115"	Fully Threaded	70,000	25	95233A159	00000




								10-32

								3/8"	0.373"	0.133"	Fully Threaded	70,000	50	95233A180	00000


								1/2"	0.373"	0.133"	Fully Threaded	70,000	50	95233A183	00000
								3/4"	0.373"	0.133"	Fully Threaded	70,000	25	95233A186	00000
								1"	0.373"	0.133"	Fully Threaded	70,000	25	95233A189	00000




										1/4"-20

										1/2"	0.492"	0.175"	Fully Threaded	70,000	25	95233A250	00000


										3/4"	0.492"	0.175"	Fully Threaded	70,000	10	95233A253	0000
										1"	0.492"	0.175"	Fully Threaded	70,000	10	95233A256	0000
										1 1/2"	0.492"	0.175"	Fully Threaded	70,000	10	95233A259	00000

Stainless Steel Hex Head Screw Kits for Metal Pipe Flanges


Shown Installed

Join aluminum or stainless steel pipe flanges. These kits come with corrosion-resistant screws and nuts in the right size and number to match your flange's bolt holes. The screws have a head with six flat sides to keep wrenches and sockets from slipping and rounding off the drive.

Screw length is measured from under the head. For a tight seal, you’ll also need a gasket between the flanges.

316 Stainless Steel—Superior to 18-8 stainless steel screws, these won't degrade when exposed to harsh weather, salt water, and most chemicals.

PTFE-Coated 316 Stainless Steel—A slippery coating prevents these nuts from binding or sticking during installation. They resist rust in wet and outdoor environments and can handle occasional exposure to mild acids and chemicals without corroding.

		Screw							Nut			316 Stainless Steel Screws and Blue PTFE-Coated 316 Stainless Steel Nuts
	For Pipe Size	Thread Size	Lg.	Head Wd.	Head Ht.	Threading	Thread Spacing	Tensile Strength, psi	Wd.	Ht.	Includes		Each
For Class 125/150 Flanges



		1/2, 3/4	1/2"-13	2"	3/4"	11/32"	Partially Threaded	Coarse	80,000	3/4"	7/16"	4 Hex Head Screws 4 Hex Nuts	94368A227	000000


		1, 1 1/4	1/2"-13	2 1/4"	3/4"	11/32"	Partially Threaded	Coarse	80,000	3/4"	7/16"	4 Hex Head Screws 4 Hex Nuts	94368A228	00000
		1 1/2	1/2"-13	2 1/2"	3/4"	11/32"	Partially Threaded	Coarse	80,000	3/4"	7/16"	4 Hex Head Screws 4 Hex Nuts	94368A212	00000
		2	5/8"-11	2 3/4"	15/16"	27/64"	Partially Threaded	Coarse	80,000	15/16"	35/64"	4 Hex Head Screws 4 Hex Nuts	94368A213	00000
		2 1/2, 3	5/8"-11	3"	15/16"	27/64"	Partially Threaded	Coarse	80,000	15/16"	35/64"	4 Hex Head Screws 4 Hex Nuts	94368A138	00000
		4	5/8"-11	3"	15/16"	27/64"	Partially Threaded	Coarse	80,000	15/16"	35/64"	8 Hex Head Screws 8 Hex Nuts	94368A139	00000
		6	3/4"-10	3 1/4"	1 1/8"	1/2"	Partially Threaded	Coarse	80,000	1 1/8"	41/64"	8 Hex Head Screws 8 Hex Nuts	94368A141	00000
		8	3/4"-10	3 1/2"	1 1/8"	1/2"	Partially Threaded	Coarse	80,000	1 1/8"	41/64"	8 Hex Head Screws 8 Hex Nuts	94368A142	00000
		10, 12	7/8"-9	4"	1 5/16"	37/64"	Partially Threaded	Coarse	80,000	1 5/16"	3/4"	12 Hex Head Screws 12 Hex Nuts	94368A144	000000


		For Class 300 Flanges



				1/2	1/2"-13	2 1/4"	3/4"	11/32"	Partially Threaded	Coarse	80,000	3/4"	7/16"	4 Hex Head Screws 4 Hex Nuts	94368A222	00000


				3/4, 1	5/8"-11	2 1/2"	15/16"	27/64"	Partially Threaded	Coarse	80,000	15/16"	35/64"	4 Hex Head Screws 4 Hex Nuts	94368A219	00000
				1 1/4	5/8"-11	2 3/4"	15/16"	27/64"	Partially Threaded	Coarse	80,000	15/16"	35/64"	4 Hex Head Screws 4 Hex Nuts	94368A218	00000
				1 1/2	3/4"-10	3"	1 1/8"	1/2"	Partially Threaded	Coarse	80,000	1 1/8"	41/64"	4 Hex Head Screws 4 Hex Nuts	94368A217	00000
				2	5/8"-11	3"	15/16"	27/64"	Partially Threaded	Coarse	80,000	15/16"	35/64"	8 Hex Head Screws 8 Hex Nuts	94368A216	00000
				3 1/2, 4	3/4"-10	3 3/4"	1 1/8"	1/2"	Partially Threaded	Coarse	80,000	1 1/8"	41/64"	8 Hex Head Screws 8 Hex Nuts	94368A221	000000