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System of Measurement System of Measurement |
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Thread Size Thread Size |
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Material Material |
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Nut Type Nut Type |
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 | Hex |
Hex Nut Profile Hex Nut Profile |
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 | Extra Wide |
Thread Direction Thread Direction |
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Height Height |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class | Show |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class | Hide |
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Drive Style Drive Style |
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 | External Hex |
Component Component |
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 | Lead Screw |
Threading Threading |
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 | Fully Threaded |
Number of Thread Starts Number of Thread Starts |
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Tensile Strength Tensile Strength |
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Speed Ratio Speed Ratio |
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Hardness Hardness |
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Selecting Compatible Lead Screws and Nuts
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About Nuts, Materials, and Finishes
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Super-Corrosion-Resistant 316 Stainless Steel
Extra-Wide Hex Nuts for High-Pressure Applications
These nuts have excellent chemical resistance and can be used in saltwater environments. They're able to maintain their strength in high-pressure and high-temperature environments and are used with ASTM A193 bolts to fasten pressure tanks, valves, and flanges. Also known as heavy hex nuts, they are about 10% wider and taller than standard hex nuts and distribute the load over a large area. Nuts may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel—Grade B8M | ||||||
|---|---|---|---|---|---|---|
1/4"-20 | 1/2" | 1/4" | ASTM A194 | 50 | 000000000 | 000000 |
| 5/16"-18 | 9/16" | 19/64" | ASTM A194 | 10 | 000000000 | 0000 |
| 3/8"-16 | 11/16" | 23/64" | ASTM A194 | 5 | 000000000 | 0000 |
| 7/16"-14 | 3/4" | 27/64" | ASTM A194 | 5 | 000000000 | 0000 |
| 1/2"-13 | 7/8" | 31/64" | ASTM A194 | 5 | 000000000 | 0000 |
| 5/8"-11 | 1 1/16" | 39/64" | ASTM A194 | 1 | 000000000 | 0000 |
| 3/4"-10 | 1 1/4" | 47/64" | ASTM A194 | 1 | 000000000 | 0000 |
| 7/8"-9 | 1 7/16" | 55/64" | ASTM A194 | 1 | 000000000 | 0000 |
| 1"-8 | 1 5/8" | 63/64" | ASTM A194 | 1 | 000000000 | 0000 |
| 1 1/8"-7 | 1 13/16" | 1 9/64" | ASTM A194 | 1 | 000000000 | 0000 |
| 1 1/8"-8 | 1 13/16" | 1 9/64" | ASTM A194 | 1 | 000000000 | 00000 |
| 1 1/4"-7 | 2" | 1 1/4" | ASTM A194 | 1 | 000000000 | 00000 |
| 1 1/4"-8 | 2" | 1 1/4" | ASTM A194 | 1 | 000000000 | 00000 |
| 1 1/2"-6 | 2 3/8" | 1 1/2" | ASTM A194 | 1 | 000000000 | 00000 |
| 1 1/2"-8 | 2 3/8" | 1 1/2" | ASTM A194 | 1 | 000000000 | 00000 |
| 1 5/8"-8 | 2 9/16" | 1 5/8" | ASTM A194 | 1 | 000000000 | 00000 |
| 1 3/4"-8 | 2 3/4" | 1 3/4" | ASTM A194 | 1 | 000000000 | 00000 |
| 2"-8 | 3 1/8" | 2 1/64" | ASTM A194 | 1 | 000000000 | 00000 |
Acme Lead Screws and Nuts
Found in hand-powered clamps, vises, grates, doors, and work tables, lead screws and nuts have broad, square threads that are well suited for quick assembly, high clamping forces, and lifting and lowering heavy objects. To ensure compatibility, please select components that have the same thread direction and size.
316 stainless steel components have excellent corrosion resistance.
Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
For technical drawings and 3-D models, click on a part number.
Lead Screws—Right-Hand Threaded
| Thread Size | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength, psi | Specifications Met | Each | |
316 Stainless Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4"-16 | 12" | 1 | 1:1 | 0.063" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1/4"-16 | 3 ft. | 1 | 1:1 | 0.063" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 1/4"-16 | 6 ft. | 1 | 1:1 | 0.063" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 3/8"-8 | 12" | 1 | 1:1 | 0.125" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 3/8"-8 | 3 ft. | 1 | 1:1 | 0.125" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 3/8"-8 | 6 ft. | 1 | 1:1 | 0.125" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 3/8"-12 | 12" | 1 | 1:1 | 0.083" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 3/8"-12 | 3 ft. | 1 | 1:1 | 0.083" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 3/8"-12 | 6 ft. | 1 | 1:1 | 0.083" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 1/2"-10 | 12" | 1 | 1:1 | 0.1" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 1/2"-10 | 3 ft. | 1 | 1:1 | 0.1" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 1/2"-10 | 6 ft. | 1 | 1:1 | 0.1" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 5/8"-8 | 12" | 1 | 1:1 | 0.125" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 5/8"-8 | 3 ft. | 1 | 1:1 | 0.125" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 5/8"-8 | 6 ft. | 1 | 1:1 | 0.125" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 3/4"-5 | 12" | 1 | 1:1 | 0.2" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 3/4"-5 | 3 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 3/4"-5 | 6 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 3/4"-6 | 12" | 1 | 1:1 | 0.167" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 3/4"-6 | 3 ft. | 1 | 1:1 | 0.167" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 3/4"-6 | 6 ft. | 1 | 1:1 | 0.167" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 7/8"-6 | 12" | 1 | 1:1 | 0.167" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 7/8"-6 | 3 ft. | 1 | 1:1 | 0.167" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 7/8"-6 | 6 ft. | 1 | 1:1 | 0.167" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1"-4 | 12" | 1 | 1:1 | 0.25" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 1"-4 | 3 ft. | 1 | 1:1 | 0.25" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1"-4 | 6 ft. | 1 | 1:1 | 0.25" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1"-5 | 12" | 1 | 1:1 | 0.2" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 1"-5 | 3 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1"-5 | 6 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1"-6 | 12" | 1 | 1:1 | 0.167" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 00000 |
| 1"-6 | 3 ft. | 1 | 1:1 | 0.167" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1"-6 | 6 ft. | 1 | 1:1 | 0.167" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1"-10 | 12" | 1 | 1:1 | 0.1" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1"-10 | 3 ft. | 1 | 1:1 | 0.1" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1"-10 | 6 ft. | 1 | 1:1 | 0.1" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1 1/4"-5 | 12" | 1 | 1:1 | 0.2" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1 1/4"-5 | 3 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1 1/4"-5 | 6 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1 1/2"-4 | 12" | 1 | 1:1 | 0.25" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1 1/2"-4 | 3 ft. | 1 | 1:1 | 0.25" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
| 1 1/2"-4 | 6 ft. | 1 | 1:1 | 0.25" | Class 2G | Grade B8M | Rockwell B97 | 75,000 | ASTM A193 | 000000000 | 000000 |
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)