The Stud,shouldered and Stepped, cataloged under National Stock Number 5307-01-043-9993, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Tusas - Turk Havacilik Ve Uzay Sanayii Anonim Sirketi. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-043-9993 |
| Primary Part Number | 16W551-7 |
| Item Name | Stud,shouldered and Stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Tusas - Turk Havacilik Ve Uzay Sanayii Anonim Sirketi |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES OVERALL |
| Cotter Pin Hole Diameter | 0.076 INCHES MINIMUM AND 0.086 INCHES MINIMUM FIRST HOLE IN |
| Nut End Shank Diameter | 0.249 INCHES NOMINAL IN |
| Thread Length | 0.380 INCHES MINIMUM AND 0.400 INCHES MAXIMUM NUT THREAD IN |
| Thread Length | 0.458 INCHES MINIMUM AND 0.478 INCHES MAXIMUM STUD THREAD IN |
| Style Designator | SHOULDERED AND STEPPED |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.3125 INCHES STUD THREAD IN |
| Shoulder Diameter | 0.563 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN |
| Stud End Shank Diameter | 0.311 INCHES NOMINAL IN |
| Nut End Shank Length | 0.277 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN |
| Thread Class | 3A NUT THREAD A |
| Thread Class | 3A STUD THREAD A |
| Thread Quantity Per Inch | 24 STUD THREAD |
| Material | STEEL CORROSION RESISTING |
| Shoulder Length | 0.005 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) STUD THREAD |
| Distance From Cotter Pin Hole Centerline to Nut End | 0.151 INCHES NOMINAL AND 1.446 INCHES NOMINAL FIRST HOLE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 16W551-7 | Tusas - Turk Havacilik Ve Uzay Sanayii Anonim Sirketi (TUR) |
| Reference | Meaning |
|---|---|
| 16W551-7 | 3/2 Design control — primary reference U.S. Government activity |
| 5307PL0646462 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5307-01-043-9993 is a Stud,shouldered and Stepped, manufactured by Tusas - Turk Havacilik Ve Uzay Sanayii Anonim Sirketi, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-043-9993 has 1 manufacturer part number on file: 16W551-7 (Tusas - Turk Havacilik Ve Uzay Sanayii Anonim Sirketi).
Key specifications for 16W551-7: Surface Finish: 63.0 MICROINCHES OVERALL; Cotter Pin Hole Diameter: 0.076 INCHES MINIMUM AND 0.086 INCHES MINIMUM FIRST HOLE IN; Nut End Shank Diameter: 0.249 INCHES NOMINAL IN; Thread Length: 0.380 INCHES MINIMUM AND 0.400 INCHES MAXIMUM NUT THREAD IN. 19 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.