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About Hex Head Screws and Bolts
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Hex Head Screw, Nut, and Washer Assortments


Keep the most common sizes of hex head screws, nuts, and washers on hand. The length of the screws is measured from under the head.
Assortments with multiple thread sizes help you replace damaged fasteners when you don’t have a thread checker handy—just test out sizes until you find what you need. Those that come in a cabinet have two removable drawers. Assortments with one thread size include screws in a variety of lengths.
Grade 5 and Class 8.8 steel fasteners are suitable for use on most machinery and equipment. Grade 8 and Class 10.9 steel fasteners can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than Grade 5 and Class 8.8 steel fasteners.
Zinc-plated steel and zinc yellow-chromate plated steel fasteners resist corrosion in wet environments. They’re a good choice for most applications.
Match the thread spacing of mating components. Coarse threads are the industry standard; choose these fasteners if you don’t know the pitch or threads per inch. Fine threads are closely spaced to prevent loosening from vibration.

| Number of Pieces | Includes | Thread Spacing | Container Type | Each | |
Inch | |||||
|---|---|---|---|---|---|
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 Split Lock Washers (For 1/4" to 3/8" Screw Sizes) | Coarse | Metal Box | 91340A112 | 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 Split Lock Washers (For 1/4" to 3/8" Screw Sizes) | Fine | Metal Box | 91340A111 | 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 Split Lock Washers (For 1/4" to 1/2" Screw Sizes) | Coarse | Metal Drawer Cabinet | 91308A220 | 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 Split Lock Washers (For 1/4" to 3/8" Screw Sizes) | Coarse | Metal Box | 91350A112 | 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 Split Lock Washers (For 1/4" to 3/8" Screw Sizes) | Fine | Metal Box | 91350A317 | 000000 |

| Thread Size | Number of Pieces | Includes | Thread Spacing | Container Type | Each | |
Inch | ||||||
|---|---|---|---|---|---|---|
Zinc-Plated Grade 5 Steel | ||||||
| 1/4"-20 | 615 | 200 Hex Head Screws (1/2" to 3" Lengths) 140 Hex Nuts 190 Flat Washers 85 Split Lock Washers | Coarse | Metal Box | 91340A113 | 000000 |
| 5/16"-18 | 565 | 215 Hex Head Screws (1/2" to 3 1/2" Lengths) 80 Hex Nuts 150 Flat Washers 120 Split Lock Washers | Coarse | Metal Box | 91340A114 | 000000 |
| 3/8"-16 | 555 | 175 Hex Head Screws (3/4" to 3 1/2" Lengths) 120 Hex Nuts 180 Flat Washers 80 Split Lock Washers | Coarse | Metal Box | 91340A115 | 000000 |
| 1/2"-13 | 265 | 90 Hex Head Screws (1" to 4" Lengths) 50 Hex Nuts 65 Flat Washers 60 Split Lock Washers | Coarse | Metal Box | 91340A116 | 000000 |
Zinc Yellow-Chromate Plated Grade 8 Steel | ||||||
| 1/4"-20 | 615 | 200 Hex Head Screws (1/2" to 3" Lengths) 140 Hex Nuts 190 Flat Washers 85 Split Lock Washers | Coarse | Metal Box | 91350A121 | 000000 |
| 3/8"-16 | 555 | 175 Hex Head Screws (3/4" to 3 1/2" Lengths) 120 Hex Nuts 180 Flat Washers 80 Split Lock Washers | Coarse | Metal Box | 91350A122 | 000000 |
| 1/2"-13 | 265 | 90 Hex Head Screws (1" to 4" Lengths) 50 Hex Nuts 65 Flat Washers 60 Split Lock Washers | Coarse | Metal Box | 91350A123 | 000000 |
| 5/8"-11 | 240 | 85 Hex Head Screws (1" to 4" Lengths) 40 Hex Nuts 65 Flat Washers 50 Split Lock Washers | Coarse | Metal Box | 91350A124 | 000000 |
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


Stock a variety of sizes so you always have the O-ring you need. With a 90A durometer, the O-rings in these assortments are harder and more wear-resistant than standard Buna-N O-rings. They resist petroleum and grease, so they’re often used in hydraulic and pneumatic systems.
Assortments with 240 pieces come with O-rings sized for hydraulic applications, including straight-thread connections, face seal fittings, and Code 61 or 62 SAE flanges.
| Number of Pieces | Number of Sizes Included | Includes | Specifications Met | Temp. Range, °F | Hardness | Color | Each | |
| 240 | 24 | Dash Numbers 011, 012, 014, 016, 018, 021, 025, 210, 212, 214, 219, 222, 225, 228, 901-906, 908, 910, 912, 916 | ASTM D2000, SAE AS568, SAE J200 | -20° to 212° | Durometer 90A (Hard) | Black | 9690K41 | 000000 |
| 382 | 30 | Dash Numbers 006-012, 110-116, 210-222, 325-327 | ASTM D2000, SAE AS568, SAE J200 | -25° to 250° | Durometer 90A (Hard) | Black | 9408K12 | 00000 |
| 385 | 30 | 2.0 mm wide o-rings (3, 4, 5, 6, 7, 8, 10 mm IDs) 2.5 mm wide o-rings (10, 11, 12, 14, 16, 17, 19 mm IDs) 3.0 mm wide o-rings (19, 20, 22, 24, 25, 27, 28, 30, 32, 33, 35, 36, 38 mm IDs) 4.0 mm wide o-rings (38, 41, 44 mm IDs) | ASTM D2000, SAE J200 | -25° to 250° | Durometer 90A (Hard) | Black | 9690K24 | 00000 |
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 |

























