The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-561-2756, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-561-2756 |
| Primary Part Number | HS5678C4-2-4 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Second Shank Diameter | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| First End Taper Length | 0.250 INCHES NOMINAL IN |
| First End Location | ROUND END |
| Second End Taper Angle | 45.0 DEGREES NOMINAL |
| Thread Length | 0.405 INCHES NOMINAL IN |
| First End Style | CHAMFERED |
| Style Designator | SHOULDER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.438 INCHES NOMINAL IN |
| First End Tip Radius | 0.060 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Second End Tip Radius | 0.030 INCHES NOMINAL IN |
| Second End Style | RADIUS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| HS5678C4-2-4 PRIMARY | Hi-Shear Corporation (USA) |
| HS5678C4-2-4 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HS5678C4-2-4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HS5678C4-2-4 PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| HS5678C4-2-4 | 3/2 Design control — primary reference U.S. Government activity |
| HS5678C4-2-4 | 5/9 Secondary reference Voi-Shan/vsi Aerospace Products Div Div of Vsi |
| HS5678C4-2-4 | 7/2 Vendor item drawing reference The Boeing Company |
NSN 5315-01-561-2756 is a Pin,shoulder,headless, manufactured by Hi-Shear Corporation, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-561-2756 has 4 manufacturer part numbers on file: HS5678C4-2-4 (Hi-Shear Corporation), HS5678C4-2-4 (Sps Technologies, Llc Dba PB Fasteners), HS5678C4-2-4 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HS5678C4-2-4 (Reid Products Inc. Dba Reid Products Inc).
Key specifications for HS5678C4-2-4: Shank Diameter: 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Second Shank Diameter: 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; First End Taper Length: 0.250 INCHES NOMINAL IN; First End Location: ROUND END. 18 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.