The Pin-Rivet, cataloged under National Stock Number 5320-01-521-8901, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5320-01-521-8901 |
| Primary Part Number | ST3M813D3-6 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Shank Diameter | 0.202 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Head Style | FLUSH COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Grip Length | 0.725 INCHES MINIMUM AND 0.745 INCHES MAXIMUM IN |
| Width Between Flats | 0.079 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.345 INCHES MINIMUM AND 0.352 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 |
|---|---|
| HP4813D3-6 | Heartland Precision Fasteners Inc (USA) |
| HLT733TB-6-6 | Huck International, Inc (USA) |
| HLT733DL-6-6 | Huck International, Inc (USA) |
| HLT733DL-6-6 | West Coast Aerospace, Inc. (USA) |
| HLT733TB-6-6 | West Coast Aerospace, Inc. (USA) |
| HLT733DL-6-6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HLT733TB-6-6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT733TB-6-6 | Hi-Shear Corporation (USA) |
| HLT733DL-6-6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT733TB-6-6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HLT733DL-6-6 | Hi-Shear Corporation (USA) |
| HLT733DL-6-6 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT733TB-6-6 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M813D3-6 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HLT733DL-6-6 | 5/2 Secondary reference U.S. Government activity |
| HLT733TB-6-6 | 5/2 Secondary reference U.S. Government activity |
NSN 5320-01-521-8901 is a Pin-Rivet, manufactured by The Boeing Company Div Defense, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-521-8901 has 14 manufacturer part numbers on file: HP4813D3-6 (Heartland Precision Fasteners Inc), HLT733TB-6-6 (Huck International, Inc), HLT733DL-6-6 (Huck International, Inc), HLT733DL-6-6 (West Coast Aerospace, Inc.), HLT733TB-6-6 (West Coast Aerospace, Inc.) and 9 more.
Key specifications for ST3M813D3-6: Shank Diameter: 0.202 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Head Style: FLUSH COUNTERSUNK; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.190 INCHES IN. 13 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.