The Pin-Rivet, cataloged under National Stock Number 5320-00-623-1817, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5320-00-623-1817 |
| Primary Part Number | TL521-4-9 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Shank Diameter | 0.2766 INCHES NOMINAL IN |
| Lubrication | CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP |
| Head Height | 0.0580 INCHES MINIMUM AND 0.0700 INCHES MAXIMUM IN |
| Fastener Length | 0.8750 INCHES MINIMUM AND 0.9000 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Tip Diameter | 0.2668 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.3125 INCHES IN |
| Grip Length | 0.5520 INCHES MINIMUM AND 0.5670 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, TAPERED, THREADED |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Shear Strength | 108000 SINGLE POUNDS PER SQUARE INCH |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 8740 OR STEEL COMP E4340 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.3920 INCHES MINIMUM AND 0.4030 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 |
|---|---|
| TL521-4-9 PRIMARY | Huck International, Inc (USA) |
| TL521-4-9 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| TL521-4-9 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| TL521-4-9 | 3/9 Design control — primary reference U.S. Government activity |
| TL521-4-9 | 5/2 Secondary reference U.S. Government activity |
| TL521-4-9 | 5/9 Secondary reference U.S. Government activity |
NSN 5320-00-623-1817 is a Pin-Rivet, manufactured by Huck International, Inc, classified under FSC 5320, Rivets. Status: active.
NSN 5320-00-623-1817 has 3 manufacturer part numbers on file: TL521-4-9 (Huck International, Inc), TL521-4-9 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), TL521-4-9 (Reid Products Inc. Dba Reid Products Inc).
Key specifications for TL521-4-9: Shank Diameter: 0.2766 INCHES NOMINAL IN; Lubrication: CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP; Head Height: 0.0580 INCHES MINIMUM AND 0.0700 INCHES MAXIMUM IN; Fastener Length: 0.8750 INCHES MINIMUM AND 0.9000 INCHES MAXIMUM IN. 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.