About Hex Head Screws and Bolts
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T-Bolts
Also known as tank-strap bolts, these T-bolts are commonly used with a band clamp or a strap to hold fuel tanks and other objects in place. The large T-shaped head provides a secure grip for steady tightening. Length is measured from the top of the head.
Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch.
Steel T-bolts without a finish are ready to be painted or finished.
Black-oxide steel T-bolts are mildly corrosion resistant in dry environments.
Zinc-plated steel T-bolts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size  | Lg. | Threading | Thread Lg. | Thread Spacing | Wd. | Thick. | Tensile Strength, psi | Each | |
Steel | |||||||||
| 3/8"-16 | 2 15/16" | Partially Threaded | 1 1/2" | Coarse | 1 3/4" | 3/8" | 120,000 | 000000000 | 00000 |
| 3/8"-16 | 3 11/16" | Partially Threaded | 1 1/2" | Coarse | 2" | 3/8" | 120,000 | 000000000 | 00000 |
Black-Oxide Steel | |||||||||
| 3/8"-16 | 5 3/16" | Partially Threaded | 4" | Coarse | 1 3/4" | 3/8" | Not Rated | 000000000 | 00000 |
Zinc-Plated Steel | |||||||||
| 3/8"-16 | 2 15/16" | Partially Threaded | 1 1/2" | Coarse | 1 3/4" | 3/8" | 120,000 | 000000000 | 0000 |
| 3/8"-16 | 3 11/16" | Partially Threaded | 1 1/2" | Coarse | 2" | 3/8" | 120,000 | 000000000 | 00000 |
T-Bolts with Collar
Also known as clamping pins, these bolts have a collar that slides along the shaft and can be welded in place to hold work and prevent over torquing. The large T-shaped head provides a secure grip for steady tightening. The black-oxide finish provides corrosion resistance in dry environments. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Threading | Thread Lg. | Thread Spacing | Wd. | Thick. | Tensile Strength, psi | Each | |
Black-Oxide Steel | |||||||||
| 3/8"-16 | 5" | Partially Threaded | 3/4" | Coarse | 3 1/2" | 1/2" | 70,000 | 000000000 | 000000 |
T-Handle Retractable Spring Plungers
 |  With Thread Locker |
 Without Thread Locker |
Lock the nose into the retracted position by pulling the handle and rotating it 90°. These spring plungers have a long nose that provides a large bearing surface to handle side loads.
Steel is strong and wear resistant. Zinc-plated steel bodies resist corrosion in wet environments.
Stainless steel is chemical resistant and may be mildly magnetic.
Spring plungers without thread locker are for use in soft material such as aluminum, in extreme temperatures, and on parts requiring frequent assembly and removal.
Spring plungers with thread locker have a nylon locking patch that adds friction to resist loosening.
Extended nose force is the force required to begin to depress the nose. Compressed nose force is the force required to depress the nose flush with the body. When using a plunger as a detent or stop, a lighter nose force with a shallower hole releases more easily, while a heavier force with a deeper hole holds more securely.
For technical drawings and 3-D models, click on a part number.
Thread | Nose | Handle | Nose Force, lbs. | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Size | Lg. | Body Lg. | Extended Lg. | Dia. | Lg. | Material | Extended | Compressed | Choose a Locking Type | Each | |
Zinc-Plated Steel Body and Steel Nose | |||||||||||
| 3/8"-16 | 1.2" | 1.68" | 0.375" | 0.233" | 1.5" | Steel | 2 | 4 | 00000000 | 000000 | |
18-8 Stainless Steel Body and 18-8 Stainless Steel Nose | |||||||||||
| 3/8"-16 | 1.2" | 1.68" | 0.375" | 0.233" | 1.5" | Stainless Steel | 2 | 4 | 00000000 | 00000 | |
Threaded-Hole Knobs
Install these knobs on a threaded stud. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.
Stainless steel knobs have excellent corrosion resistance, making them the best choice for harsh environments. They also have good chemical resistance.
Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. Phenolic has good scratch resistance. Polypropylene has good impact resistance.
For technical drawings and 3-D models, click on a part number.
Thread | Head | Hub | Each | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Dia. | Ht. | Insert Material | Temperature Range, °F | 1-9 | 10-Up | |
Style 13—Two Arm Grip | ||||||||||
Black Phenolic Plastic | ||||||||||
| 3/8"-16 | 1/2" | 2" | 5/8" | 3/4" | 1/2" | Brass | -30 to 400° | 00000000 | 00000 | 00000 |
Black Polypropylene Plastic | ||||||||||
| 3/8"-16 | 1/2" | 1 1/2" | 5/8" | 3/4" | 1/8" | Brass | -15 to 125° | 0000000 | 0000 | 0000 |
| 3/8"-16 | 1/2" | 2 1/2" | 5/8" | 3/4" | 1/2" | Brass | -15 to 125° | 00000000 | 0000 | 0000 |
| 3/8"-16 | 1/2" | 3 1/2" | 7/8" | 15/16" | 1/4" | Brass | -15 to 125° | 00000000 | 0000 | 0000 |
Style 14—Two Arm Grip | ||||||||||
Black Polypropylene Plastic | ||||||||||
| 3/8"-16 | 1/2" | 2 1/4" | 3/4" | 3/4" | 11/16" | Brass | -15 to 125° | 0000000 | 0000 | 0000 |
Style 15—Two Arm Grip | ||||||||||
303 Stainless Steel | ||||||||||
| 3/8"-16 | 9/16" | 2 15/16" | 3/4" | 13/16" | 5/8" | __ | __ | 0000000 | 00000 | 00000 |
Style 18—Two Arm Grip | ||||||||||
Black Polypropylene Plastic | ||||||||||
| 3/8"-16 | 1/2" | 3" | 3/8" | 13/16" | 13/16" | Brass | -15 to 125° | 0000000 | 0000 | 0000 |
Threaded-Stud Knobs
Mount these knobs into a threaded hole. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.
Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. Phenolic has good scratch resistance. Nylon has good wear resistance. Polypropylene has good impact resistance.
For technical drawings and 3-D models, click on a part number.
Head | Hub | Each | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Stud Lg. | Wd. | Ht. | Dia. | Ht. | Stud Material | Temperature Range, °F | 1-9 | 10-Up | |
Style 7—Two Arm Grip | ||||||||||
Black Phenolic Plastic | ||||||||||
| 3/8"-16 | 1" | 2" | 5/8" | 3/4" | 1/2" | Stainless Steel | -30° to 400° | 00000000 | 00000 | 00000 |
| 3/8"-16 | 1" | 2" | 5/8" | 3/4" | 1/2" | Steel | -30° to 400° | 00000000 | 0000 | 0000 |
Black Nylon Plastic | ||||||||||
| 3/8"-16 | 1/2" | 2 1/2" | 5/8" | 3/4" | 1/2" | Steel | -15° to 150° | 00000000 | 0000 | 0000 |
| 3/8"-16 | 1" | 2 1/2" | 5/8" | 3/4" | 1/2" | Stainless Steel | -15° to 150° | 00000000 | 0000 | 0000 |
| 3/8"-16 | 1" | 2 1/2" | 5/8" | 3/4" | 1/2" | Steel | -15° to 150° | 00000000 | 0000 | 0000 |
| 3/8"-16 | 1" | 3 1/2" | 7/8" | 15/16" | 1/4" | Steel | -15° to 150° | 00000000 | 0000 | 0000 |
Style 8—Two Arm Grip | ||||||||||
Black Polypropylene Plastic | ||||||||||
| 3/8"-16 | 1 1/2" | 2 1/4" | 3/4" | 3/4" | 11/16" | Stainless Steel | -15° to 125° | 00000000 | 0000 | 0000 |
Vibration-Resistant Threaded Through-Hole Knobs
Like locknuts, these knobs have a nylon insert that grips threads to resist loosening. Long shafts can thread through these knobs for mounting versatility. Use the knobs as a grip to position, tighten, and hold fixtures, equipment, and machinery. Made of plastic, all resist oil, grease, and solvents.
For technical drawings and 3-D models, click on a part number.