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Medium-Strength Grade 5 Steel Hex Head Screws with Nuts and Washers
Twice as strong as low-strength steel screws, these Grade 5 screws are suitable for fastening most machinery and equipment. They come with matching nuts and washers so you can make a complete joint. All are zinc plated to prevent corrosion in wet environments. Washers distribute the pressure from a tightened nut over the surface of your material, which helps prevent damage. Screws and nuts meet SAE specifications for material quality and ASME specifications for dimensions. For quick identification, the screw heads are marked with three radial lines. Length is measured from under the head.
Screw | Nut | Washer | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing  | Head Wd. | Head Ht. | Tensile Strength, psi | Wd. | Ht. | ID | OD | Thick. | No. of Screws Included | No. of Nuts Included | No. of Washers Included | Each | |
Zinc-Plated Grade 5 Steel | ||||||||||||||||
1/4"-20 | ||||||||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 120,000 | 7/16" | 7/32" | 0.281" | 0.625" | 0.065" | 25 | 25 | 50 | 97375A124 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 120,000 | 7/16" | 7/32" | 0.281" | 0.625" | 0.065" | 25 | 25 | 50 | 97375A126 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 120,000 | 7/16" | 7/32" | 0.281" | 0.625" | 0.065" | 25 | 25 | 50 | 97375A123 | 00000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 120,000 | 7/16" | 7/32" | 0.281" | 0.625" | 0.065" | 25 | 25 | 50 | 97375A122 | 00000 |
| 1 1/2" | Partially Threaded | 3/4" | Coarse | 7/16" | 5/32" | 120,000 | 7/16" | 7/32" | 0.281" | 0.625" | 0.065" | 25 | 25 | 50 | 97375A121 | 00000 |
| 2" | Partially Threaded | 3/4" | Coarse | 7/16" | 5/32" | 120,000 | 7/16" | 7/32" | 0.281" | 0.625" | 0.065" | 25 | 25 | 50 | 97375A125 | 00000 |
5/16"-18 | ||||||||||||||||
| 3/4" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 120,000 | 1/2" | 17/64" | 0.343" | 0.687" | 0.065" | 25 | 25 | 50 | 97375A131 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 120,000 | 1/2" | 17/64" | 0.343" | 0.687" | 0.065" | 25 | 25 | 50 | 97375A129 | 00000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 120,000 | 1/2" | 17/64" | 0.343" | 0.687" | 0.065" | 25 | 25 | 50 | 97375A128 | 00000 |
| 1 1/2" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 120,000 | 1/2" | 17/64" | 0.343" | 0.687" | 0.065" | 25 | 25 | 50 | 97375A127 | 00000 |
3/8"-16 | ||||||||||||||||
| 1" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 120,000 | 9/16" | 21/64" | 0.406" | 0.812" | 0.065" | 10 | 10 | 20 | 97375A135 | 00000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 120,000 | 9/16" | 21/64" | 0.406" | 0.812" | 0.065" | 25 | 25 | 50 | 97375A133 | 00000 |
| 1 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 120,000 | 9/16" | 21/64" | 0.406" | 0.812" | 0.065" | 25 | 25 | 50 | 97375A132 | 00000 |
| 1 3/4" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 120,000 | 9/16" | 21/64" | 0.406" | 0.812" | 0.065" | 25 | 25 | 50 | 97375A134 | 00000 |
| 2" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 120,000 | 9/16" | 21/64" | 0.406" | 0.812" | 0.065" | 10 | 10 | 20 | 97375A137 | 0000 |
| 2 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 120,000 | 9/16" | 21/64" | 0.406" | 0.812" | 0.065" | 10 | 10 | 20 | 97375A136 | 00000 |
| 3" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 120,000 | 9/16" | 21/64" | 0.406" | 0.812" | 0.065" | 10 | 10 | 20 | 97375A138 | 00000 |
1/2"-13 | ||||||||||||||||
| 1" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 120,000 | 3/4" | 7/16" | 0.531" | 1.062" | 0.095" | 10 | 10 | 20 | 97375A141 | 00000 |
| 1 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 120,000 | 3/4" | 7/16" | 0.531" | 1.062" | 0.095" | 10 | 10 | 20 | 97375A139 | 00000 |
| 2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 120,000 | 3/4" | 7/16" | 0.531" | 1.062" | 0.095" | 10 | 10 | 20 | 97375A143 | 00000 |
| 2 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 120,000 | 3/4" | 7/16" | 0.531" | 1.062" | 0.095" | 10 | 10 | 20 | 97375A142 | 00000 |
| 3" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 120,000 | 3/4" | 7/16" | 0.531" | 1.062" | 0.095" | 5 | 5 | 10 | 97375A144 | 00000 |
Square-Profile Oil-Resistant Buna-N O-Ring Assortments
All of the O-rings in this assortment have a square profile with flat edges on all four sides. They cover more surface than round-profile O-rings for a better seal in static applications, such as hose, pipe, and faucet connections. They're made of Buna-N, which is resilient and offers excellent tear resistance. They resist hydraulic oils and motor oil. All are sized to the SAE standard AS568.
| Number of Pieces | Number of Sizes Included | Includes | Specifications Met | Temperature Range, °F | Hardness | Color | Each | |
| 382 | 30 | Dash Numbers 006-012, 110-116, 210-222, 325-327 | ASTM D2000, SAE AS568, SAE J200 | -30° to 212° | Durometer 70A (Medium) | Black | 9408K14 | 000000 |
Oil-Resistant Buna-N O-Ring Assortments
All of the O-rings in these assortments are made of Buna-N. They resist animal, vegetable, and motor oils. All have a round profile and are suitable for a wide range of static and dynamic sealing applications.
Inch O-rings have a dash number and are sized to the SAE standard AS568.
The 1,110-piece assortment contains a mix of standard O-rings and O-rings for tube fittings with a straight-thread connection.
| Number of Pieces | Number of Sizes Included | Includes | Specifications Met | Temperature Range, °F | Each | |
Durometer 70A (Medium) | ||||||
|---|---|---|---|---|---|---|
Black | ||||||
| 200 | 12 | Dash Numbers 010-012, 110-116, 211-212 | ASTM D2000, SAE AS568 | -25° to 250° | 9486K63 | 000000 |
| 382 | 30 | Dash Numbers 006-012, 110-116, 210-222, 325-327 | ASTM D2000, SAE AS568 | -25° to 250° | 9408K41 | 00000 |
| 436 | 36 | Dash Numbers 005-018, 110-121, 210-219 | ASTM D2000, SAE AS568 | -25° to 250° | 9000K11 | 00000 |
| 611 | 37 | Dash Numbers 006-012, 110-116, 210-222, 325-334 | ASTM D2000, SAE AS568 | -25° to 250° | 9399K11 | 000000 |
| 1,110 | 150 | Dash Numbers 001-046, 110-151, 210-237, 325-338, 901-914, 916, 918, 920, 924, 928, 932 | ASTM D2000, SAE AS568 | -25° to 250° | 9000K14 | 000000 |
Oil-Resistant Hard Buna-N O-Ring Assortments
Offering better wear resistance than standard Buna-N O-rings, all of the O-rings in these assortments are made of hard Buna-N. They resist animal, vegetable, and motor oils. These O-rings have a round profile and are suitable for a wide range of static and dynamic sealing applications.
Inch O-rings have a dash number and are sized to the SAE standard AS568.
| Number of Pieces | Number of Sizes Included | Includes | Specifications Met | Temp. Range, °F | Hardness | Color | Each | |
| 382 | 30 | Dash Numbers 006-012, 110-116, 210-222, 325-327 | ASTM D2000, SAE AS568 | -25° to 250° | Durometer 90A (Hard) | Black | 9408K12 | 000000 |
Oil-Resistant Soft Buna-N O-Ring Assortments
Softer than standard Buna-N O-rings for a better seal in low-pressure applications. The O-rings in this assortment resist animal, vegetable, and motor oil. They have a round profile and are suitable for a wide range of static and dynamic sealing applications. All are sized to the SAE standard AS568.
| Number of Pieces | Number of Sizes Included | Includes | Specifications Met | Temperature Range, °F | Hardness | Color | Each | |
| 382 | 30 | Dash Numbers 006-012, 110-116, 210-222, 325-327 | ASTM D2000, SAE AS568 | -25° to 250° | Durometer 50A (Soft) | Black | 9408K13 | 000000 |
Oil-Resistant Hard Buna-N O-Ring Assortments for Straight-Thread Connections
Keep a range of sizes on hand so that you always have the O-ring you need. Also known as boss O-rings, the O-rings in these assortments are sized to fit straight threaded fittings to prevent leaks. With a 90A durometer hardness, they're more wear resistant than standard Buna-N O-rings. They withstand motor oil, hydraulic fluid, and mild chemicals, so they're often installed in hydraulic and pneumatic systems.
| Number of Pieces | Number of Sizes Included | Includes | Specifications Met | Temperature Range, °F | Hardness | Color | Each | |
| 212 | 20 | Dash Numbers 901-914, 916, 918, 920, 924, 928, 932 | ASTM D2000, SAE AS568 | -25° to 250° | Durometer 90A (Hard) | Black | 9749K29 | 000000 |
X-Profile Oil-Resistant Buna-N O-Ring Assortments
Keep a selection of sizes on hand so you always have the O-ring you need. The O-rings in these assortments have four points of contact to create a strong seal. They’re often used on moving parts, such as pistons and rotating shafts. Also known as Quattro seals and X-rings, they resist rolling and twisting better than O-rings with a round or square profile. They also require less compression to seal, which reduces friction and extends their service life. Made of Buna-N, these O-rings are resilient and tear resistant. They resist hydraulic and motor oil.
| Number of Pieces | Number of Sizes Included | Includes | Specifications Met | Temperature Range, °F | Hardness | Color | Each | |
| 226 | 36 | Dash Numbers 005-018, 110-121, 210-219 | ASTM D2000, SAE AS568 | -25° to 250° | Durometer 70A (Medium) | Black | 93065K62 | 000000 |
High-Temperature O-Ring Assortments
Able to withstand heat up to 450° F, the O-rings in these assortments are silicone and maintain a strong seal even when the temperature rises. All have a round profile and are suitable for a wide range of static and dynamic sealing applications. These O-rings are sized to the SAE standard AS568.
| Number of Pieces | Number of Sizes Included | Includes | Temperature Range, °F | Hardness | Color | Each | |
| 200 | 12 | Dash Numbers 010-012, 110-116, 211-212 | -65° to 450° | Durometer 70A (Medium) | Red | 93135K31 | 000000 |
Water- and Steam-Resistant EPDM and
High-Temperature Silicone O-Ring Assortments
Keep a range of sizes on hand so that you always have the O-ring you need. These assortments include 584 EPDM O-rings and 584 silicone O-rings. EPDM O-rings have excellent resistance to water, steam, and glycol-based fluids, including brake fluid. They’re often used to seal chemical processing equipment and refrigeration systems, since they won’t swell or break down in moist environments. Silicone O-rings can withstand temperatures up to 450° F. They're FDA compliant for direct contact with food, so they're frequently used on hot food lines. They’re also used to seal HVAC systems.
EPDM Rubber | Silicone Rubber | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Pieces | No. of Sizes Included | Includes | Specifications Met | Temp. Range, °F | Hardness | Color | Specifications Met | Temp. Range, °F | Hardness | Color | Each | |
| 1,168 | 19 | Dash Numbers 006-012, 110-116, 210-214 | ASTM D2000 SAE AS568 SAE J200 | -60° to 250° | Durometer 70A (Medium) | Black | FDA Compliant 21 CFR 177.2600 SAE AS568 | -65° to 450° | Durometer 70A (Medium) | Red | 9726K27 | 0000000 |
Oil- and Chemical-Resistant O-Ring Assortments
This assortment contains 584 Buna-N O-rings that resist oil and 584 Viton® fluoroelastomer O-rings that resist boric acid, fuels, and transmission fluid. These O-rings have a round profile and are suitable for a wide range of static and dynamic sealing applications. All are sized to the SAE standard AS568.
Buna-N Rubber | Viton® Fluoroelastomer Rubber | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Number of Pieces | Number of Sizes Included | Includes | Temperature Range, °F | Hardness | Color | Temperature Range, °F | Hardness | Color | Each | |
| 1,168 | 19 | Dash Numbers 006-012, 110-116, 210-214 | -25° to 250° | Durometer 70A (Medium) | Black | -15° to 400° | Durometer 75A (Medium) | Brown | 9726K25 | 0000000 |
Water- and Steam-Resistant O-Ring Assortments
In addition to water and steam, the O-rings in this assortment resist ethanol and ethylene glycol. Made of EPDM, all have a round profile and are suitable for a wide range of static and dynamic sealing applications. These O-rings are sized to the SAE standard AS568.
| Number of Pieces | Number of Sizes Included | Includes | Specifications Met | Temperature Range, °F | Hardness | Color | Each | |
| 200 | 12 | Dash Numbers 010-012, 110-116, 211-212 | ASTM D2000, SAE AS568, SAE J200 | -60° to 250° | Durometer 70A (Medium) | Black | 93045K11 | 000000 |
Chemical-Resistant Hard Viton® Fluoroelastomer O-Ring
Assortments for Tube Fittings with Straight-Thread Connection
Also known as Boss O-rings, all of these hard Viton® fluoroelastomer O-rings are for use in tube fittings with a straight-thread connection. They resist wear, isopropyl alcohol, mineral oils, and transmission fluid. All have a round profile and are suitable for a wide range of static and dynamic sealing applications. These O-rings are sized to the SAE standard AS568.
| Number of Pieces | Number of Sizes Included | Includes | Specifications Met | Temperature Range, °F | Hardness | Color | Each | |
| 212 | 20 | Dash Numbers 901-914, 916, 918, 920, 924, 928, 932 | ASTM D2000, SAE AS568, SAE J200 | -15° to 400° | Durometer 90A (Hard) | Black | 9749K39 | 0000000 |
Chemical-Resistant Viton® Fluoroelastomer O-Ring Assortments
All of the O-rings in these assortments are Viton® fluoroelastomer and resist isopropyl alcohol, mineral oils, and transmission fluid. They have a round profile and are suitable for a wide range of static and dynamic sealing applications.
Inch O-rings have a dash number and are sized to the SAE standard AS568.
Metric O-rings are sized to the actual measured inside diameter.
The 1,110-piece assortment contains a mix of standard O-rings and O-rings for tube fittings with a straight-thread connection.
| No. of Pieces | No. of Sizes Included | Includes | Specifications Met | Temp. Range, °F | Each | |
Durometer 75A (Medium) | ||||||
|---|---|---|---|---|---|---|
Black | ||||||
| 180 | 30 | Dash Numbers 006-012, 110-116, 210-222, 325-327 | ASTM D2000, SAE AS568, SAE J200 | -15° to 400° | 9511K31 | 0000000 |
| 500 | 36 | 1.5 mm wide o-rings (5, 13, 16 mm IDs) 1.6 mm wide o-rings (2.2, 3.1, 4.1, 7.1, 9.1, 10.1, 13.1 mm IDs) 2.0 mm wide o-rings (4, 6, 8, 9, 10, 12, 14, 16, 19, 20 mm IDs) 2.4 mm wide o-rings (4.3, 5.3, 5.6, 7.6, 8.3, 8.6 mm IDs) 2.5 mm wide o-rings (10, 13-19 mm IDs) 3.0 mm wide o-rings (9, 10, 11 mm IDs) | ASTM D2000, SAE J200 | -15° to 400° | 9443K39 | 000000 |
| 611 | 37 | Dash Numbers 006-012, 110-116, 210-222, 325-334 | ASTM D2000, SAE AS568, SAE J200 | -15° to 400° | 93145K11 | 000000 |
| 1,110 | 150 | Dash Numbers 001-046, 110-151, 210-237, 325-338, 901-914, 916, 918, 920, 924, 928, 932 | ASTM D2000, SAE AS568, SAE J200 | -15° to 400° | 9465K11 | 000000 |
Ultra-Chemical-Resistant Rigid PTFE O-Ring Assortments
The O-rings in this assortment are rigid and hard with a slippery surface. Made of PTFE, they resist harsh chemicals, such as acetone, fluorinated solvents, methanol, and boric, nitric, and sulfonic acids. All have a round profile and are suitable for a wide range of static and dynamic sealing applications. These O-rings are sized to the SAE standard AS568.
| Number of Pieces | Number of Sizes Included | Includes | Temperature Range, °F | Hardness | Color | Each | |
| 325 | 36 | Dash Numbers 005-018, 110-121, 210-219 | -100° to 500° | Durometer 55D (Hard) | White | 94895K31 | 0000000 |