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About Hex Head Screws and Bolts
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Choose a hex head fastener with the right threading, thread size, material, and strength for your equipment.
Steel Cotter-Pin-Locking Hex Head Screws
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Partially Threaded |
Secure rotating parts subjected to vibration, such as the wheels on carts and hand trucks. A cotter pin (not included) slides through the hole in the shank of these screws to keep nuts from loosening. They hold stronger than screws with threadlocker and lockwashers, but they aren’t recommended for high-vibration applications because prolonged stress can shear the pin. The head's six flat sides keep wrenches and sockets from slipping and rounding off the drive.
Length is measured from under the head.
Medium-Strength Fastener—Your go-to screws for fastening most machinery and equipment. They have tensile strengths from 90,000 to 120,000 psi.
Cadmium-Plated Steel—The plating reduces friction between the screw and your mounting surface to prevent sticking when you tighten or loosen screws. It also creates a barrier against rust.
Head | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Wd. | Ht. | Hole Dia. | For Cotter Pin Dia. | Threading | Thread Spacing | Tensile Strength, psi | Mil. Spec. | Pkg. Qty. | Pkg. | |||
Medium-Strength Cadmium-Plated Steel | |||||||||||||
1/4"-28 | |||||||||||||
| 17/32" | 7/16" | 11/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN4-4 | 10 | 94622A211 | 000000 | ||
| 21/32" | 7/16" | 11/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN4-5 | 10 | 94622A212 | 00000 | ||
| 25/32" | 7/16" | 11/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN4-6 | 10 | 94622A213 | 00000 | ||
| 1 1/32" | 7/16" | 11/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN4-10 | 10 | 94622A214 | 00000 | ||
| 1 9/32" | 7/16" | 11/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN4-12 | 10 | 94622A215 | 00000 | ||
| 1 17/32" | 7/16" | 11/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN4-14 | 10 | 94622A216 | 00000 | ||
| 2 1/32" | 7/16" | 11/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN4-20 | 10 | 94622A217 | 00000 | ||
5/16"-24 | |||||||||||||
| 27/32" | 1/2" | 13/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN5-6 | 5 | 94622A221 | 0000 | ||
| 1 3/32" | 1/2" | 13/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN5-10 | 5 | 94622A222 | 00000 | ||
| 1 11/32" | 1/2" | 13/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN5-12 | 5 | 94622A223 | 00000 | ||
| 1 19/32" | 1/2" | 13/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN5-14 | 5 | 94622A224 | 00000 | ||
| 2 3/32" | 1/2" | 13/64" | 0.076" | 1/16" | Partially Threaded | Fine | 120,000 | AN5-20 | 5 | 94622A225 | 00000 | ||
3/8"-24 | |||||||||||||
| 53/64" | 9/16" | 15/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN6-6 | 5 | 94622A231 | 00000 | ||
| 1 5/64" | 9/16" | 15/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN6-10 | 5 | 94622A232 | 00000 | ||
| 1 21/64" | 9/16" | 15/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN6-12 | 5 | 94622A233 | 00000 | ||
| 1 37/64" | 9/16" | 15/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN6-14 | 5 | 94622A234 | 00000 | ||
| 1 53/64" | 9/16" | 15/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN6-16 | 5 | 94622A235 | 00000 | ||
| 2 5/64" | 9/16" | 15/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN6-20 | 5 | 94622A236 | 00000 | ||
| 2 37/64" | 9/16" | 15/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN6-24 | 5 | 94622A237 | 00000 | ||
| 3 5/64" | 9/16" | 15/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN6-30 | 5 | 94622A238 | 00000 | ||
1/2"-20 | |||||||||||||
| 1 3/32" | 3/4" | 19/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN8-10 | 1 | 94622A241 | 00000 | ||
| 1 11/32" | 3/4" | 19/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN8-12 | 1 | 94622A242 | 0000 | ||
| 1 19/32" | 3/4" | 19/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN8-14 | 1 | 94622A243 | 00000 | ||
| 1 27/32" | 3/4" | 19/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN8-16 | 1 | 94622A244 | 0000 | ||
| 2 3/32" | 3/4" | 19/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN8-20 | 1 | 94622A245 | 00000 | ||
| 2 19/32" | 3/4" | 19/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN8-24 | 1 | 94622A246 | 00000 | ||
| 3 3/32" | 3/4" | 19/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN8-30 | 1 | 94622A247 | 00000 | ||
| 3 19/32" | 3/4" | 19/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN8-34 | 1 | 94622A248 | 00000 | ||
| 4 3/32" | 3/4" | 19/64" | 0.106" | 3/32" | Partially Threaded | Fine | 120,000 | AN8-40 | 1 | 94622A249 | 00000 | ||
Steel Hex Head Screws
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Partially Threaded |
Our most popular hex head screws. These have a head with six flat sides to keep wrenches and sockets from slipping and rounding off the drive.
Length is measured from under the head.
Medium-Strength Fastener—Your go-to screws for fastening most machinery and equipment. They have tensile strengths from 90,000 to 120,000 psi.
Cadmium-Plated Steel—The plating reduces friction between the screw and your mounting surface to prevent sticking when you tighten or loosen screws. It also creates a barrier against rust.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Wd. | Ht. | Threading | Thread Spacing | Tensile Strength, psi | Mil. Spec. | Pkg. Qty. | Pkg. | |||
Medium-Strength Cadmium-Plated Steel | |||||||||||
1/4"-28 | |||||||||||
| 17/32" | 7/16" | 11/64" | Partially Threaded | Fine | 120,000 | AN4-4A | 25 | 94622A411 | 000000 | ||
| 21/32" | 7/16" | 11/64" | Partially Threaded | Fine | 120,000 | AN4-5A | 25 | 94622A412 | 00000 | ||
| 25/32" | 7/16" | 11/64" | Partially Threaded | Fine | 120,000 | AN4-6A | 25 | 94622A413 | 00000 | ||
| 1 1/32" | 7/16" | 11/64" | Partially Threaded | Fine | 120,000 | AN4-10A | 10 | 94622A414 | 0000 | ||
| 1 9/32" | 7/16" | 11/64" | Partially Threaded | Fine | 120,000 | AN4-12A | 10 | 94622A415 | 00000 | ||
| 1 17/32" | 7/16" | 11/64" | Partially Threaded | Fine | 120,000 | AN4-14A | 10 | 94622A416 | 0000 | ||
| 2 1/32" | 7/16" | 11/64" | Partially Threaded | Fine | 120,000 | AN4-20A | 10 | 94622A417 | 00000 | ||
5/16"-24 | |||||||||||
| 27/32" | 1/2" | 13/64" | Partially Threaded | Fine | 120,000 | AN5-6A | 10 | 94622A421 | 00000 | ||
| 1 3/32" | 1/2" | 13/64" | Partially Threaded | Fine | 120,000 | AN5-10A | 10 | 94622A422 | 00000 | ||
| 1 11/32" | 1/2" | 13/64" | Partially Threaded | Fine | 120,000 | AN5-12A | 10 | 94622A423 | 00000 | ||
| 1 19/32" | 1/2" | 13/64" | Partially Threaded | Fine | 120,000 | AN5-14A | 10 | 94622A424 | 00000 | ||
| 2 3/32" | 1/2" | 13/64" | Partially Threaded | Fine | 120,000 | AN5-20A | 10 | 94622A425 | 00000 | ||
3/8"-24 | |||||||||||
| 53/64" | 9/16" | 15/64" | Partially Threaded | Fine | 120,000 | AN6-6A | 5 | 94622A431 | 00000 | ||
| 1 5/64" | 9/16" | 15/64" | Partially Threaded | Fine | 120,000 | AN6-10A | 5 | 94622A432 | 0000 | ||
| 1 21/64" | 9/16" | 15/64" | Partially Threaded | Fine | 120,000 | AN6-12A | 5 | 94622A433 | 00000 | ||
| 1 37/64" | 9/16" | 15/64" | Partially Threaded | Fine | 120,000 | AN6-14A | 5 | 94622A434 | 00000 | ||
| 1 53/64" | 9/16" | 15/64" | Partially Threaded | Fine | 120,000 | AN6-16A | 5 | 94622A435 | 00000 | ||
| 2 5/64" | 9/16" | 15/64" | Partially Threaded | Fine | 120,000 | AN6-20A | 5 | 94622A436 | 00000 | ||
| 2 37/64" | 9/16" | 15/64" | Partially Threaded | Fine | 120,000 | AN6-24A | 5 | 94622A437 | 00000 | ||
| 3 5/64" | 9/16" | 15/64" | Partially Threaded | Fine | 120,000 | AN6-30A | 5 | 94622A438 | 00000 | ||
1/2"-20 | |||||||||||
| 1 3/32" | 3/4" | 19/64" | Partially Threaded | Fine | 120,000 | AN8-10A | 1 | 94622A441 | 0000 | ||
| 1 11/32" | 3/4" | 19/64" | Partially Threaded | Fine | 120,000 | AN8-12A | 1 | 94622A442 | 0000 | ||
| 1 19/32" | 3/4" | 19/64" | Partially Threaded | Fine | 120,000 | AN8-14A | 1 | 94622A443 | 0000 | ||
| 1 27/32" | 3/4" | 19/64" | Partially Threaded | Fine | 120,000 | AN8-16A | 1 | 94622A444 | 0000 | ||
| 2 3/32" | 3/4" | 19/64" | Partially Threaded | Fine | 120,000 | AN8-20A | 1 | 94622A445 | 0000 | ||
| 2 19/32" | 3/4" | 19/64" | Partially Threaded | Fine | 120,000 | AN8-24A | 1 | 94622A446 | 00000 | ||
| 3 3/32" | 3/4" | 19/64" | Partially Threaded | Fine | 120,000 | AN8-30A | 1 | 94622A447 | 0000 | ||
| 3 19/32" | 3/4" | 19/64" | Partially Threaded | Fine | 120,000 | AN8-34A | 1 | 94622A448 | 0000 | ||
| 4 3/32" | 3/4" | 19/64" | Partially Threaded | Fine | 120,000 | AN8-40A | 1 | 94622A449 | 00000 | ||
Wire-Locking Stainless Steel Fillister Head Slotted Screws
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The best vibration resistance of our rounded head screws. Secure a wire through the hole in the head of these screws to lock them in place. Unlike screws with threadlocker or lock washers, they handle more vibration and movement, but they're more difficult to install. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals. With a deeper drive than others, fillister heads reduce the likelihood that basic slotted drivers slip as you hand-tighten them.
Length is measured from under the head.
18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel can.
Military Specification—These screws are manufactured and tested to meet strict U.S. military standards for material and construction.
Stainless Steel Wire—Thread this stainless steel wire through screws to lock them together.
Screws | Stainless Steel Wire | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Head | |||||||||||||
Lg. | Dia. | Ht. | Hole Dia. | Threading | Tensile Strength, psi | Mil. Spec. | Pkg. Qty. | Pkg. | Each | ||||
18-8 Stainless Steel | |||||||||||||
2-56 | |||||||||||||
| 1/4" | 0.14" | 0.083" | 0.031" | Fully Threaded | 80,000 | AN500AD2-4, Fed. Spec. QQ-P-35, MS35275-203, NASM35275 | 10 | 90350A110 | 000000 | 8860K11 | 000000 | ||
| 5/16" | 0.14" | 0.083" | 0.031" | Fully Threaded | 80,000 | AN500AD2-5, Fed. Spec. QQ-P-35, MS35275-204, NASM35275 | 10 | 90350A115 | 00000 | 8860K11 | 00000 | ||
| 3/8" | 0.14" | 0.083" | 0.031" | Fully Threaded | 80,000 | AN500AD2-6, Fed. Spec. QQ-P-35, MS35275-205, NASM35275 | 10 | 90350A120 | 00000 | 8860K11 | 00000 | ||
| 1/2" | 0.14" | 0.083" | 0.031" | Fully Threaded | 80,000 | AN500AD2-8, Fed. Spec. QQ-P-35, MS35275-207, NASM35275 | 10 | 90350A125 | 0000 | 8860K11 | 00000 | ||
4-40 | |||||||||||||
| 3/16" | 0.183" | 0.107" | 0.037" | Fully Threaded | 80,000 | AN500AD4-3, Fed. Spec. QQ-P-35, MS35275-212, NASM35275 | 5 | 90350A150 | 0000 | 8860K12 | 0000 | ||
| 1/4" | 0.183" | 0.107" | 0.037" | Fully Threaded | 80,000 | AN500AD4-4, Fed. Spec. QQ-P-35, MS35275-213, NASM35275 | 10 | 90350A155 | 0000 | 8860K12 | 0000 | ||
| 5/16" | 0.183" | 0.107" | 0.037" | Fully Threaded | 80,000 | AN500AD4-5, Fed. Spec. QQ-P-35, MS35275-214, NASM35275 | 10 | 90350A160 | 0000 | 8860K12 | 0000 | ||
| 3/8" | 0.183" | 0.107" | 0.037" | Fully Threaded | 80,000 | AN500AD4-6, Fed. Spec. QQ-P-35, MS35275-215, NASM35275 | 10 | 90350A165 | 00000 | 8860K12 | 0000 | ||
| 1/2" | 0.183" | 0.107" | 0.037" | Fully Threaded | 80,000 | AN500AD4-8, Fed. Spec. QQ-P-35, MS35275-217, NASM35275 | 10 | 90350A170 | 0000 | 8860K12 | 0000 | ||
6-32 | |||||||||||||
| 3/16" | 0.226" | 0.132" | 0.046" | Fully Threaded | 80,000 | AN500AD6-3, Fed. Spec. QQ-P-35, MS35275-225, NASM35275 | 5 | 90350A205 | 00000 | 8860K13 | 0000 | ||
| 1/4" | 0.226" | 0.132" | 0.046" | Fully Threaded | 80,000 | AN500AD6-4, Fed. Spec. QQ-P-35, MS35275-226, NASM35275 | 10 | 90350A210 | 0000 | 8860K13 | 0000 | ||
| 5/16" | 0.226" | 0.132" | 0.046" | Fully Threaded | 80,000 | AN500AD6-5, Fed. Spec. QQ-P-35, MS35275-227, NASM35275 | 10 | 90350A215 | 0000 | 8860K13 | 0000 | ||
| 3/8" | 0.226" | 0.132" | 0.046" | Fully Threaded | 80,000 | AN500AD6-6, Fed. Spec. QQ-P-35, MS35275-228, NASM35275 | 10 | 90350A220 | 00000 | 8860K13 | 0000 | ||
| 1/2" | 0.226" | 0.132" | 0.046" | Fully Threaded | 80,000 | AN500AD6-8, Fed. Spec. QQ-P-35, MS35275-230, NASM35275 | 10 | 90350A225 | 00000 | 8860K13 | 0000 | ||
| 3/4" | 0.226" | 0.132" | 0.046" | Fully Threaded | 80,000 | AN500AD6-12, Fed. Spec. QQ-P-35, MS35275-232, NASM35275 | 5 | 90350A230 | 0000 | 8860K13 | 0000 | ||
8-32 | |||||||||||||
| 3/8" | 0.27" | 0.156" | 0.046" | Fully Threaded | 80,000 | AN500AD8-6, Fed. Spec. QQ-P-35, MS35275-243, NASM35275 | 5 | 90350A265 | 0000 | 8860K13 | 0000 | ||
| 1/2" | 0.27" | 0.156" | 0.046" | Fully Threaded | 80,000 | AN500AD8-8, Fed. Spec. QQ-P-35, MS35275-245, NASM35275 | 5 | 90350A270 | 0000 | 8860K13 | 0000 | ||
| 3/4" | 0.27" | 0.156" | 0.046" | Fully Threaded | 80,000 | AN500AD8-12, Fed. Spec. QQ-P-35, MS35275-247, NASM35275 | 5 | 90350A275 | 0000 | 8860K13 | 0000 | ||
10-32 | |||||||||||||
| 3/8" | 0.313" | 0.18" | 0.046" | Fully Threaded | 80,000 | AN501AD10-6, Fed. Spec. QQ-P-35, MS35276-261, NASM35275, NASM35276 | 5 | 90350A300 | 0000 | 8860K13 | 0000 | ||
| 1/2" | 0.313" | 0.18" | 0.046" | Fully Threaded | 80,000 | AN501AD10-8, Fed. Spec. QQ-P-35, MS35276-263, NASM35276 | 5 | 90350A305 | 0000 | 8860K13 | 0000 | ||
| 3/4" | 0.313" | 0.18" | 0.046" | Fully Threaded | 80,000 | AN501AD10-12, Fed. Spec. QQ-P-35, MS35276-265, NASM35276 | 5 | 90350A310 | 0000 | 8860K13 | 0000 | ||
