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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, NAS1351C00-2, NASM16996, Fed. Spec. FF-S-86 | 10 | 000000000 | 00000 |
| 3/16" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 80,000 | MS16996-2, NAS1351C00-3, NASM16996, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 1/4" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 80,000 | MS16996-3, NAS1351C00-4, NASM16996, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 3/8" | Fully Threaded | __ | Fine | 0.096" | 0.06" | 0.050" | 80,000 | MS16996-4, NAS1351C00-6, NASM16996, 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, NASM16996, 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, NASM16996, 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, NASM16996, 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, NASM16996, 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, NASM16996, Fed. Spec. FF-S-86 | 10 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 80,000 | MS16996-14, NAS1351C3-16, NASM16996, 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, NASM16996, 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, NASM16996, 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, NASM16996, 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, NASM16996, 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, NASM16996, Fed. Spec. FF-S-86 | 5 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 80,000 | MS16996-24, NAS1351C4-16, NASM16996, 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, NASM16996, Fed. Spec. FF-S-86 | 5 | 000000000 | 00000 |
| 1 1/2" | Partially Threaded | 1" | Fine | 3/8" | 1/4" | 3/16" | 80,000 | MS16996-26, NAS1351C4-24, NASM16996, Fed. Spec. FF-S-86 | 5 | 000000000 | 00000 |
5/16"-24 | |||||||||||
| 3/4" | Fully Threaded | __ | Fine | 15/32" | 5/16" | 1/4" | 80,000 | MS16996-31, NAS1351C5-12, NASM16996, Fed. Spec. FF-S-86 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Fine | 15/32" | 5/16" | 1/4" | 80,000 | MS16996-32, NAS1351C5-16, NASM16996, 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, NASM16996, 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, NASM16996, 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, NASM16996, Fed. Spec. FF-S-86 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Fine | 9/16" | 3/8" | 5/16" | 80,000 | MS16996-40, NAS1351C6-16, NASM16996, 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, NASM16996, Fed. Spec. FF-S-86 | 1 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | __ | Fine | 9/16" | 3/8" | 5/16" | 80,000 | MS16996-42, NAS1351C6-24, NASM16996, Fed. Spec. FF-S-86 | 1 | 000000000 | 0000 |