The Pin-Rivet, cataloged under National Stock Number 5320-01-623-5057, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-623-5057 |
| Primary Part Number | HLT51YB-12-19 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Head Height | 0.0759 INCHES MINIMUM AND 0.0780 INCHES MAXIMUM IN |
| Fastener Length | 1.7325 INCHES NOMINAL IN |
| Head Style | CROWN COUNTERSUNK LESS THAN 135 DEGREES |
| Nominal Thread Size | 0.3750 INCHES IN |
| Grip Length | 1.1875 INCHES NOMINAL IN |
| Width Between Flats | 0.197 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 25 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.554 INCHES MINIMUM AND 0.560 INCHES MAXIMUM 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 |
|---|---|
| HLT51YB-12-19 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| ST3M758C6-19 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5320-01-623-5057 is a Pin-Rivet, manufactured by Hi-Shear Corporation, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-623-5057 has 1 manufacturer part number on file: HLT51YB-12-19 (Hi-Shear Corporation).
Key specifications for HLT51YB-12-19: Shank Diameter: 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN; Head Height: 0.0759 INCHES MINIMUM AND 0.0780 INCHES MAXIMUM IN; Fastener Length: 1.7325 INCHES NOMINAL IN; Head Style: CROWN COUNTERSUNK LESS THAN 135 DEGREES. 14 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.