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About Socket Head Screws
More
Mil. Spec. Alloy Steel Socket Head Screws
Fully Threaded
Partially Threaded
Choose these screws for their adherence to strict military standards for material and construction. With a tensile strength of 180,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. They're cadmium plated to resist corrosion in wet environments. Length is measured from under the head.
Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Each | |
Cadmium-Plated Alloy Steel | ||||||||||
10-32  | ||||||||||
| 3/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 180,000 | MS16998-26, NAS1351-3-6P | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 180,000 | MS16998-27, NAS1351-3-8P | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 180,000 | MS16998-28, NAS1351-3-10P | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 180,000 | MS16998-29, NAS1351-3-12P | 000000000 | 0000 |
| 7/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 180,000 | MS16998-30, NAS1351-3-14P | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 180,000 | MS16998-31, NAS1351-3-16P | 000000000 | 0000 |
| 1 1/4" | Partially Threaded | 7/8" | Fine | 5/16" | 0.19" | 5/32" | 180,000 | MS16998-32, NAS1351-3-20P | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1 1/8" | Fine | 5/16" | 0.19" | 5/32" | 180,000 | MS16998-33, NAS1351-3-24P | 000000000 | 0000 |
| 1 3/4" | Partially Threaded | 7/8" | Fine | 5/16" | 0.19" | 5/32" | 180,000 | MS16998-34, NAS1351-3-28P | 000000000 | 0000 |
| 2" | Partially Threaded | 1 1/8" | Fine | 5/16" | 0.19" | 5/32" | 180,000 | MS16998-35, NAS1351-3-32P | 000000000 | 0000 |
1/4"-28 | ||||||||||
| 1/2" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 180,000 | MS16998-41, NAS1351-4-8P | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 180,000 | MS16998-42, NAS1351-4-10P | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 180,000 | MS16998-43, NAS1351-4-12P | 000000000 | 0000 |
| 7/8" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 180,000 | MS16998-44, NAS1351-4-14P | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 180,000 | MS16998-45, NAS1351-4-16P | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 180,000 | MS16998-46, NAS1351-4-20P | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1" | Fine | 3/8" | 1/4" | 3/16" | 180,000 | MS16998-47, NAS1351-4-24P | 000000000 | 0000 |
| 1 3/4" | Partially Threaded | 1 1/4" | Fine | 3/8" | 1/4" | 3/16" | 180,000 | MS16998-48, NAS1351-4-28P | 000000000 | 0000 |
| 2" | Partially Threaded | 1" | Fine | 3/8" | 1/4" | 3/16" | 180,000 | MS16998-49, NAS1351-4-32P | 000000000 | 0000 |
| 2 1/4" | Partially Threaded | 1 1/4" | Fine | 3/8" | 1/4" | 3/16" | 180,000 | MS16998-50, NAS1351-4-36P | 000000000 | 0000 |
Mil. Spec. 18-8 Stainless Steel Socket Head Screws
Fully Threaded
Partially Threaded
Choose these screws for their adherence to strict military standards for material and construction. Dimensions meet Fed. Spec. FF-S-86 specifications. Screws may be mildly magnetic. Length is measured from under the head. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||||
0-80 | |||||||||||
| 1/8" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 80,000 | MS16996-1, NAS1351C0-02, Fed. Spec. FF-S-86 | 10 | 000000000 | 00000 |
| 3/16" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 80,000 | MS16996-2, NAS1351C0-03, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 1/4" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 80,000 | MS16996-3, NAS1351C0-04, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 3/8" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 80,000 | MS16996-4, NAS1351C0-06, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
10-32 | |||||||||||
| 3/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 80,000 | MS16996-9, NAS1351C3-6, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 80,000 | MS16996-10, NAS1351C3-8, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 80,000 | MS16996-11, NAS1351C3-10, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 80,000 | MS16996-12, NAS1351C3-12, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 7/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 80,000 | MS16996-13, NAS1351C3-14, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 80,000 | MS16996-14, NAS1351C3-16, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 1 1/4" | Partially Threaded | 7/8" | Fine | 5/16" | 0.19" | 5/32" | 80,000 | MS16996-15, NAS1351C3-20, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1 1/8" | Fine | 5/16" | 0.19" | 5/32" | 80,000 | MS16996-16, NAS1351C3-24, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
1/4"-28 | |||||||||||
| 1/2" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 80,000 | MS16996-21, NAS1351C4-8, Fed. Spec. FF-S-86 | 5 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 80,000 | MS16996-22, NAS1351C4-10, Fed. Spec. FF-S-86 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 80,000 | MS16996-23, NAS1351C4-12, Fed. Spec. FF-S-86 | 5 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 80,000 | MS16996-24, NAS1351C4-16, Fed. Spec. FF-S-86 | 5 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 80,000 | MS16996-25, NAS1351C4-20, Fed. Spec. FF-S-86 | 5 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1" | Fine | 3/8" | 1/4" | 3/16" | 80,000 | MS16996-26, NAS1351C4-24, Fed. Spec. FF-S-86 | 5 | 000000000 | 0000 |
5/16"-24 | |||||||||||
| 3/4" | Fully Threaded | __ | Fine | 15/32" | 5/16" | 1/4" | 80,000 | MS16996-31, NAS1351C5-12, Fed. Spec. FF-S-86 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Fine | 15/32" | 5/16" | 1/4" | 80,000 | MS16996-32, NAS1351C5-16, Fed. Spec. FF-S-86 | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Fine | 15/32" | 5/16" | 1/4" | 80,000 | MS16996-33, NAS1351C5-20, Fed. Spec. FF-S-86 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Fine | 15/32" | 5/16" | 1/4" | 80,000 | MS16996-34, NAS1351C5-24, Fed. Spec. FF-S-86 | 1 | 000000000 | 0000 |
3/8"-24 | |||||||||||
| 3/4" | Fully Threaded | __ | Fine | 9/16" | 3/8" | 5/16" | 80,000 | MS16996-39, NAS1351C6-12, Fed. Spec. FF-S-86 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Fine | 9/16" | 3/8" | 5/16" | 80,000 | MS16996-40, NAS1351C6-16, Fed. Spec. FF-S-86 | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Fine | 9/16" | 3/8" | 5/16" | 80,000 | MS16996-41, NAS1351C6-20, Fed. Spec. FF-S-86 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Fine | 9/16" | 3/8" | 5/16" | 80,000 | MS16996-42, NAS1351C6-24, Fed. Spec. FF-S-86 | 1 | 000000000 | 00000 |
High-Strength A286 Stainless Steel Socket Head Screws
Fully Threaded
Partially Threaded
Often used to fasten parts in engines and turbines, these are our strongest stainless steel screws. They are comparable in strength to alloy steel with the corrosion resistance of 18-8 stainless steel. Screws are nonmagnetic. Length is measured from under the head. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
Screws that meet Fed. Spec. FF-S-86 and ISO 4762 (formerly DIN 912) comply with specifications for dimensional standards.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Yield Strength, psi | Specifications Met | Each | |
A286 Stainless Steel | |||||||||||
0-80 | |||||||||||
| 1/8" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N00-2 | 000000000 | 00000 |
| 3/16" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N00-3 | 000000000 | 0000 |
| 1/4" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N00-4 | 000000000 | 0000 |
| 5/16" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N00-5 | 000000000 | 0000 |
| 3/8" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N00-6 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N00-8 | 000000000 | 0000 |
10-32 | |||||||||||
| 3/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N-3-6 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N-3-8 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N-3-10 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N-3-12 | 000000000 | 0000 |
| 7/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N-3-14 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N-3-16 | 000000000 | 0000 |
| 1 1/4" | Partially Threaded | 7/8" | Fine | 5/16" | 0.19" | 5/32" | 160,000 | 120,000 | Fed. Spec. FF-S-86, NAS1351N-3-20 | 000000000 | 0000 |