The Pin-Rivet, cataloged under National Stock Number 5320-01-591-0550, 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 6 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5320-01-591-0550 |
| Primary Part Number | HL645-10-16 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Lubrication | SOLID FILM |
| Fastener Length | 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN |
| Head Style | FLUSH COUNTERSUNK |
| Nominal Thread Size | 0.312 INCHES IN |
| Grip Length | 0.995 INCHES MINIMUM AND 1.005 INCHES MAXIMUM IN |
| Width Between Flats | 0.127 INCHES MINIMUM AND 0.129 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.468 INCHES MINIMUM AND 0.473 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 |
|---|---|
| HL645-10-16 PRIMARY | Hi-Shear Corporation (USA) |
| HL645-10-16 | Huck International, Inc (USA) |
| HL645-10-16 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HL645-10-16 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HL645-10-16 | West Coast Aerospace, Inc. (USA) |
| HL645-10-16 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| HL645-10-16 | 5/2 Secondary reference U.S. Government activity |
| HL645-10-16 | 5/2 Secondary reference U.S. Government activity |
NSN 5320-01-591-0550 is a Pin-Rivet, manufactured by Hi-Shear Corporation, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-591-0550 has 6 manufacturer part numbers on file: HL645-10-16 (Hi-Shear Corporation), HL645-10-16 (Huck International, Inc), HL645-10-16 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HL645-10-16 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HL645-10-16 (West Coast Aerospace, Inc.) and 1 more.
Key specifications for HL645-10-16: Shank Diameter: 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN; Lubrication: SOLID FILM; Fastener Length: 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN; Head Style: FLUSH COUNTERSUNK. 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.