The Pin-Rivet, cataloged under National Stock Number 5320-01-323-0251, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-323-0251 |
| Primary Part Number | HLT451-6-6 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Shank Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Lubrication | CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP |
| Fastener Length | 0.690 INCHES MINIMUM AND 0.710 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Head Style | FLUSH COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Grip Length | 0.365 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Width Between Flats | 0.0791 INCHES MINIMUM AND 0.0806 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Shear Strength | 95000 SINGLE POUNDS PER SQUARE INCH |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.2966 INCHES MINIMUM AND 0.3016 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 |
|---|---|
| HLT451-6-6 | Huck International, Inc (USA) |
| HLT451-6-6 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT451-6-6 | West Coast Aerospace, Inc. (USA) |
| HLT451-6-6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT451-6-6 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| 03A074-6-6 | 5/9 Secondary reference Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| HLT451-6-6 | 5/9 Secondary reference U.S. Government activity |
| HLT451-6-6 | 5/9 Secondary reference Sps Technologies Inc |
| HLT451-6-6 | 5/2 Secondary reference U.S. Government activity |
| HLT451-6-6 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
NSN 5320-01-323-0251 is a Pin-Rivet, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-323-0251 has 5 manufacturer part numbers on file: HLT451-6-6 (Huck International, Inc), HLT451-6-6 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HLT451-6-6 (West Coast Aerospace, Inc.), HLT451-6-6 (Sps Technologies, Llc Dba PB Fasteners), HLT451-6-6 (Hi-Shear Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5320-01-466-8130. Verify interchangeability with system specifications before substitution.
Key specifications for HLT451-6-6: Shank Diameter: 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN; Lubrication: CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP; Fastener Length: 0.690 INCHES MINIMUM AND 0.710 INCHES MAXIMUM IN; Material Document and Classification: AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 17 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.