About Durometer Hardness Scales
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Selecting Compatible Lead Screws and Nuts
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About Threaded Studs and Rods
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Inch-to-Inch Male-Female Hex Thread Adapters


Change thread sizes or types, such as fine to coarse threads, on parts without changing gender. These adapters can also be used as standoffs to position components in assemblies and to create space between parts. They have an external hex, so you can tighten them with a wrench.
Black oxide steel adapters have a finish that matches the aesthetics of your system and won’t chip or rub off. They resist rust better than plain steel in indoor and dry environments. However, they will corrode outdoors. At about a third of the weight of steel adapters, aluminum adapters are the lightest we offer. They resist corrosion in wet environments.
18-8 stainless steel adapters resist corrosion in wet environments but will corrode when exposed to salt water and chemicals. They may be mildly magnetic. 316 stainless steel adapters are for use in wet environments and have the best corrosion resistance. Unlike 18-8 stainless steel adapters, they resist corrosion caused by salt water and chemicals. They may be mildly magnetic.
Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Gender | Thread Fit | Hex | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | (A) | (B) | (A) | (B) | Size | Lg. | Specifications Met | Tensile Strength, psi | Hardness | Each | |
Black-Oxide Steel | ||||||||||||||
3/8"-16 | 3/4"-10 | 3/4" | 1" | Male | Female | Class 2A | Class 2B | 1 1/4" | 2 1/4" | ASTM A108 | Not Rated | Rockwell B65 | 000000000 | 000000 |
Aluminum | ||||||||||||||
3/8"-16 | 3/4"-10 | 3/4" | 1" | Male | Female | Class 2A | Class 2B | 1 1/4" | 2 1/4" | ASTM B211 | 45,000 | Rockwell B56 | 000000000 | 00000 |
1/2"-13 | 3/4"-10 | 3/4" | 1" | Male | Female | Class 2A | Class 2B | 1 1/4" | 2 1/4" | ASTM B211 | 45,000 | Rockwell B56 | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||||||||
3/8"-16 | 3/4"-10 | 3/4" | 1" | Male | Female | Class 2A | Class 2B | 1 1/4" | 2 1/4" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 |
1/2"-13 | 3/4"-10 | 3/4" | 1" | Male | Female | Class 2A | Class 2B | 1 1/4" | 2 1/4" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 |
316 Stainless Steel | ||||||||||||||
3/8"-16 | 3/4"-10 | 3/4" | 1" | Male | Female | Class 2A | Class 2B | 1 1/4" | 2 1/4" | ASTM A276 | 75,000 | Rockwell B83 | 000000000 | 00000 |
1/2"-13 | 3/4"-10 | 3/4" | 1" | Male | Female | Class 2A | Class 2B | 1 1/4" | 2 1/4" | ASTM A276 | 75,000 | Rockwell B83 | 000000000 | 00000 |
Inch-to-Inch Female Hex Thread Adapters


Connect two differently sized male-threaded parts, such as threaded rods, and tighten with a standard wrench. The threads on these adapters have various sizes and spacing, so you can increase or decrease thread size or adapt from coarse to fine threading. You can also use them to change the gender of a connection from male to female. Small adapters can work as threaded standoffs, which position and separate circuit boards and other components in assemblies.
Black-oxide steel adapters have a finish that won’t chip or rub off. They match the aesthetics of many systems and resists rust in indoor and dry environments.
Zinc-plated steel adapters resist corrosion until the plating wears away and are often used in dry environments.
18-8 stainless steel adapters withstand wet environments but will corrode when exposed to salt water and other chloride solutions.
316 stainless steel adapters are ideal in wet environments and will not corrode when exposed to salt water or harsh chemicals.
Aluminum adapters are about one third of the weight of steel adapters and resist corrosion in wet environments.
Adapters that meet ASTM specifications are made from or plated with materials that adhere to standards for chemical and physical properties, such as hardness.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Thread Fit | Hex | Each | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | (A) | (B) | Size | Lg. | Specifications Met | Hardness | 1-9 | 10-Up | |
Black-Oxide Steel | ||||||||||||
1/2"-13 | 3/4"-10 | 1/2" | 3/4" | Class 2B | Class 2B | 1" | 2 1/4" | ASTM A108 | Rockwell B65 | 000000000 | 00000 | 00000 |
5/8"-11 | 3/4"-10 | 5/8" | 3/4" | Class 2B | Class 2B | 1" | 2" | ASTM A108 | Rockwell B65 | 000000000 | 0000 | 0000 |
Zinc-Plated Steel | ||||||||||||
1/2"-13 | 3/4"-10 | 1/2" | 41/64" | Class 2B | Class 2B | 1" | 1 1/2" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 0000 | 0000 |
5/8"-11 | 3/4"-10 | 5/8" | 41/64" | Class 2B | Class 2B | 1" | 1 1/2" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 0000 | 0000 |
3/4"-10 | 7/8"-9 | 3/4" | 3/4" | Class 2B | Class 2B | 1 1/4" | 1 3/4" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 0000 | 0000 |
3/4"-10 | 1"-8 | 3/4" | 55/64" | Class 2B | Class 2B | 1 3/8" | 2" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 00000 | 00000 |
3/4"-10 | 1 1/4"-7 | 3/4" | 1 1/16" | Class 2B | Class 2B | 1 5/8" | 3" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 00000 | 00000 |
18-8 Stainless Steel | ||||||||||||
3/8"-16 | 3/4"-10 | 3/8" | 3/4" | Class 2B | Class 2B | 1" | 1 1/2" | ASTM A582 | Rockwell B80 | 000000000 | 0000 | 0000 |
3/8"-24 | 3/4"-10 | 3/8" | 3/4" | Class 2B | Class 2B | 1" | 1 1/2" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
3/8"-32 | 3/4"-10 | 3/8" | 3/4" | Class 2B | Class 2B | 1" | 1 1/2" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
1/2"-13 | 3/4"-10 | 1/2" | 3/4" | Class 2B | Class 2B | 1" | 2 1/4" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
1/2"-20 | 3/4"-10 | 1/2" | 3/4" | Class 2B | Class 2B | 1" | 2 1/4" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
1/2"-28 | 3/4"-10 | 1/2" | 3/4" | Class 2B | Class 2B | 1" | 2 1/4" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
5/8"-11 | 3/4"-10 | 5/8" | 3/4" | Class 2B | Class 2B | 1" | 2" | __ | Rockwell B55 | 000000000 | 00000 | 00000 |
3/4"-10 | 3/4"-16 | 3/4" | 3/4" | Class 2B | Class 2B | 1 1/4" | 2" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
3/4"-10 | 7/8"-9 | 3/4" | 7/8" | Class 2B | Class 2B | 1 1/4" | 2 1/4" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
3/4"-10 | 1"-8 | 3/4" | 1" | Class 2B | Class 2B | 1 3/8" | 2 1/2" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
3/4"-10 | 1 1/4"-7 | 3/4" | 1 1/16" | Class 2B | Class 2B | 1 5/8" | 3" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
316 Stainless Steel | ||||||||||||
3/8"-16 | 3/4"-10 | 3/8" | 3/4" | Class 2B | Class 2B | 1" | 1 1/2" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 0000 |
3/8"-24 | 3/4"-10 | 3/8" | 3/4" | Class 2B | Class 2B | 1" | 1 1/2" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
3/8"-32 | 3/4"-10 | 3/8" | 3/4" | Class 2B | Class 2B | 1" | 1 1/2" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
1/2"-13 | 3/4"-10 | 1/2" | 3/4" | Class 2B | Class 2B | 1" | 2 1/4" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
1/2"-20 | 3/4"-10 | 1/2" | 3/4" | Class 2B | Class 2B | 1" | 2 1/4" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
1/2"-28 | 3/4"-10 | 1/2" | 3/4" | Class 2B | Class 2B | 1" | 2 1/4" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
5/8"-11 | 3/4"-10 | 5/8" | 3/4" | Class 2B | Class 2B | 1" | 2" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
3/4"-10 | 3/4"-16 | 3/4" | 3/4" | Class 2B | Class 2B | 1 1/4" | 2" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
3/4"-10 | 7/8"-9 | 3/4" | 7/8" | Class 2B | Class 2B | 1 1/4" | 2 1/4" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
3/4"-10 | 1"-8 | 3/4" | 1" | Class 2B | Class 2B | 1 3/8" | 2 1/2" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
3/4"-10 | 1 1/4"-7 | 3/4" | 1 1/16" | Class 2B | Class 2B | 1 5/8" | 3" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
Aluminum | ||||||||||||
3/8"-16 | 3/4"-10 | 3/8" | 3/4" | Class 2B | Class 2B | 1" | 1 1/2" | ASTM B211 | Rockwell B56 | 000000000 | 0000 | 0000 |
3/8"-24 | 3/4"-10 | 3/8" | 3/4" | Class 2B | Class 2B | 1" | 1 1/2" | ASTM B211 | Rockwell B56 | 000000000 | 0000 | 0000 |
1/2"-13 | 3/4"-10 | 1/2" | 3/4" | Class 2B | Class 2B | 1" | 2 1/4" | ASTM B211 | Rockwell B56 | 000000000 | 0000 | 0000 |
1/2"-20 | 3/4"-10 | 1/2" | 3/4" | Class 2B | Class 2B | 1" | 2 1/4" | ASTM B211 | Rockwell B56 | 000000000 | 0000 | 0000 |
1/2"-28 | 3/4"-10 | 1/2" | 3/4" | Class 2B | Class 2B | 1" | 2 1/4" | ASTM B211 | Rockwell B56 | 000000000 | 0000 | 0000 |
5/8"-11 | 3/4"-10 | 5/8" | 3/4" | Class 2B | Class 2B | 1" | 2" | ASTM B211 | Rockwell B56 | 000000000 | 0000 | 0000 |
3/4"-10 | 3/4"-16 | 3/4" | 3/4" | Class 2B | Class 2B | 1 1/4" | 2" | ASTM B211 | Rockwell B56 | 000000000 | 00000 | 00000 |
Left-Hand to Right-Hand Female Hex Thread Adapters

Often called sleeve nuts, these thread adapters fasten parts with right-hand threads to parts with left-hand threads.
Choose black-oxide steel adapters to match the aesthetics of your system or for their mild corrosion resistance. The finish won't chip or rub off. They resist rust in indoor and dry environments, but avoid using them in corrosive environments.
Zinc-plated steel adapters are strong and corrosion resistant.
18-8 stainless steel adapters have good corrosion resistance.
316 stainless steel adapters have the best corrosion resistance. They stand up to wet environments, just like 18-8 stainless steel adapters, but unlike 18-8 stainless steel adapters, they resist corrosion caused by salt water and harsh chemicals.
For technical drawings and 3-D models, click on a part number.

Thread Size | Thread Lg. | Thread Fit | Hex | Each | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | (A) | (B) | Size | Lg. | Hardness | 1-9 | 10-Up | |
Black-Oxide Steel | |||||||||||
3/4"-10 | 3/4"-10 | 1 1/2" | 1 1/2" | Class 2B | Class 2B | 1 1/4" | 5" | Rockwell B80 | 000000000 | 000000 | 000000 |
Zinc-Plated Steel | |||||||||||
3/4"-10 | 3/4"-10 | 2 1/4" | 2 1/4" | Class 2B | Class 2B | 1 1/4" | 5" | Rockwell B65 | 000000000 | 00000 | 00000 |
18-8 Stainless Steel | |||||||||||
3/4"-10 | 3/4"-10 | 1 1/2" | 1 1/2" | Class 2B | Class 2B | 1 1/4" | 5" | Rockwell B80 | 000000000 | 00000 | 00000 |
316 Stainless Steel | |||||||||||
3/4"-10 | 3/4"-10 | 1 1/2" | 1 1/2" | Class 2B | Class 2B | 1 1/4" | 5" | Rockwell B80 | 000000000 | 00000 | 00000 |
Inch-to-Inch Male Hex Thread Adapters


Need to join two female-threaded parts, such as coupling nuts, with dissimilar inch thread sizes? Attach them to these adapters and tighten the exterior hex nut for a secure connection. You can also use these adapters to change the gender of a mating part from female to male, increase or decrease the thread size, or convert the threads from fine to coarse (and vice versa). The smaller adapters act as threaded standoffs, positioning and separating circuit boards and other components in assemblies.
Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.
Choose black-oxide steel adapters to match the aesthetics of your system or for their mild corrosion resistance. The finish won't chip or rub off. They resist rust in indoor and dry environments, but avoid using them in corrosive environments.
18-8 stainless steel adapters resist corrosion caused by water. They're good for wet and damp environments but will corrode when exposed to salt water and other chloride solutions.
316 stainless steel adapters have the best corrosion resistance. They stand up to wet environments, just like 18-8 stainless steel adapters, but unlike 18-8 stainless steel adapters, they resist corrosion caused by salt water and harsh chemicals.
At about a third of the weight of steel adapters, aluminum adapters are the lightest we offer. They resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Thread Fit | Hex | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | (A) | (B) | Size | Lg. | Specifications Met | Tensile Strength, psi | Hardness | Each | |
Black-Oxide Steel | ||||||||||||
3/8"-16 | 3/4"-10 | 5/8" | 3/4" | Class 2A | Class 2A | 1 1/8" | 11/16" | ASTM A108 | 78,000 | Rockwell B85 | 000000000 | 000000 |
1/2"-13 | 3/4"-10 | 3/4" | 3/4" | Class 2A | Class 2A | 1 1/8" | 11/16" | ASTM A108 | 78,000 | Rockwell B85 | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||||||
3/8"-16 | 3/4"-10 | 5/8" | 3/4" | Class 2A | Class 2A | 1 1/8" | 11/16" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 |
1/2"-13 | 3/4"-10 | 3/4" | 3/4" | Class 2A | Class 2A | 1 1/8" | 11/16" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 |
316 Stainless Steel | ||||||||||||
3/8"-16 | 3/4"-10 | 5/8" | 3/4" | Class 2A | Class 2A | 1 1/8" | 11/16" | ASTM A276 | 75,000 | Rockwell B83 | 000000000 | 00000 |
1/2"-13 | 3/4"-10 | 3/4" | 3/4" | Class 2A | Class 2A | 1 1/8" | 11/16" | ASTM A276 | 75,000 | Rockwell B83 | 000000000 | 00000 |
Aluminum | ||||||||||||
3/8"-16 | 3/4"-10 | 5/8" | 3/4" | Class 2A | Class 2A | 1 1/8" | 11/16" | ASTM B211 | 45,000 | Rockwell B56 | 000000000 | 00000 |
1/2"-13 | 3/4"-10 | 3/4" | 3/4" | Class 2A | Class 2A | 1 1/8" | 11/16" | ASTM B211 | 45,000 | Rockwell B56 | 000000000 | 00000 |
Left-Hand to Right-Hand Male Thread Adapters

Made from black-oxide steel, these adapters resist corrosion in dry environments. Thread length is the same on both ends.
For technical drawings and 3-D models, click on a part number.
Threaded Bumpers

Mount these bumpers on a threaded stud. All are reinforced with a steel core or base plate for strength. Often used as feet, spacers, and vibration dampers, they absorb shock to prevent damage to equipment and surfaces. They're also good for starting and stopping motion on automated machines. All of these bumpers can be used outdoors.
Bumpers with a medium and medium-soft rating offer a balance of cushioning and impact resistance. The softer the bumper, the more it cushions.
Bumpers with an extra-hard, hard, and medium-hard rating withstand high levels of impact. The harder the bumper, the more impact it withstands.
Buna-N bumpers resist abrasion, oil, and grease.
Neoprene bumpers have good abrasion resistance.
Polyurethane bumpers have better abrasion resistance than neoprene bumpers. They won't become brittle and crack when exposed to ozone.
For technical drawings and 3-D models, click on a part number.


Thread | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Size | Dp. | OD | Ht. | Temp. Range, °F | For Use Outdoors | Hardness Rating | Hardness | Nonmarking | Color | Each | |
Buna-N Rubber with Steel Core | |||||||||||
3/4"-10 | 1" | 2 1/4" | 2 1/4" | -60° to 175° | Yes | Medium Soft | Durometer 40A | Yes | White | 00000000 | 000000 |
Neoprene Rubber with Steel Core | |||||||||||
3/4"-10 | 1" | 2 1/4" | 2 1/4" | -40° to 200° | Yes | Hard | Durometer 75A | No | Black | 00000000 | 00000 |
3/4"-10 | 1" | 2 1/4" | 2 1/4" | -40° to 200° | Yes | Medium Soft | Durometer 40A | No | Black | 0000000 | 00000 |
Polyurethane Rubber with Steel Core | |||||||||||
3/4"-10 | 1" | 2 1/4" | 2 1/4" | -40° to 200° | Yes | Extra Hard | Durometer 95A | No | Black | 00000000 | 00000 |
3/4"-10 | 1" | 2 1/4" | 2 1/4" | -40° to 200° | Yes | Hard | Durometer 85A | No | Red | 0000000 | 00000 |
3/4"-10 | 1" | 2 1/4" | 2 1/4" | -40° to 200° | Yes | Medium | Durometer 50A | No | Red | 00000000 | 00000 |
3/4"-10 | 1" | 2 1/4" | 2 1/4" | -40° to 200° | Yes | Medium Hard | Durometer 60A | No | Black | 00000000 | 00000 |
3/4"-10 | 1" | 2 1/4" | 2 1/4" | -40° to 200° | Yes | Medium Soft | Durometer 40A | No | Red | 0000000 | 00000 |
Clamping Acme Lead Screw Collars

Thread these one-piece collars onto an Acme lead screw to separate and position components, or use them as an end stop to limit travel. Tighten the clamping screw to secure.
To ensure compatibility, please select a collar that has the same thread type, direction, and size as your lead screw.
Black-oxide carbon steel collars have mild corrosion resistance. 303 stainless steel collars have good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Two-Piece Clamping Acme Lead Screw Collars

Mount these two-piece collars anywhere on an Acme lead screw without removing components. Use them to separate and position components or as an end stop to limit travel. Tighten the clamping screw to secure.
To ensure compatibility, please select a collar that has the same thread type, direction, and size as your lead screw.
Black-oxide carbon steel collars have mild corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Thread Size | OD | Wd. | No. of Thread Starts | Hardness | Each | |
Right-Hand Threaded | ||||||
---|---|---|---|---|---|---|
Black-Oxide 1215 Carbon Steel | ||||||
3/4"-10 | 1 1/2" | 1/2" | 1 | Brinell 167 | 0000000 | 000000 |