The Pin-Rivet, cataloged under National Stock Number 5320-01-564-0499, 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-564-0499 |
| Primary Part Number | ST3M812D4-6 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Shank Diameter | 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Fastener Length | 0.800 INCHES MINIMUM AND 0.820 INCHES MAXIMUM IN |
| Head Style | FLUSH COUNTERSUNK |
| Nominal Thread Size | 0.250 INCHES IN |
| Grip Length | 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Width Between Flats | 0.094 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.389 INCHES MINIMUM AND 0.394 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 |
|---|---|
| ST3M812D4-6 | Heartland Precision Fasteners Inc (USA) |
| HP4812D4-6 | Heartland Precision Fasteners Inc (USA) |
| HLT731DL-8-6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HLT731DL-8-6 | West Coast Aerospace, Inc. (USA) |
| HLT731TB-8-6 | West Coast Aerospace, Inc. (USA) |
| ST3M812D4-6 PRIMARY | The Boeing Company Div Defense (USA) |
| HLT731TB-8-6 | Huck International, Inc (USA) |
| HLT731DL-8-6 | Huck International, Inc (USA) |
| HLT731TB-8-6 | Hi-Shear Corporation (USA) |
| HLT731TB-8-6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT731DL-8-6 | Hi-Shear Corporation (USA) |
| ST3M812D4-6 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HLT731DL-8-6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M812D4-6 | Houston Precision Fasteners I Lp (USA) |
| Reference | Meaning |
|---|---|
| ST3M812D4-6 | 5/9 Secondary reference Hi-Shear Corporation |
| ST3M812D4-6 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HLT731TB-8-6 | 5/2 Secondary reference U.S. Government activity |
| HLT731DL-8-6 | 5/9 Secondary reference Sps Technologies Inc |
| ST3M812D4-6 | 5/9 Secondary reference U.S. Government activity |
| ST3M812D4-6 | 5/9 Secondary reference Huck International, Inc |
| ST3M812D4-6 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| ST3M812D4-6 | 5/9 Secondary reference West Coast Aerospace, Inc. |
| HLT731DL-8-6 | 5/2 Secondary reference U.S. Government activity |
NSN 5320-01-564-0499 is a Pin-Rivet, manufactured by The Boeing Company Div Defense, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-564-0499 has 14 manufacturer part numbers on file: ST3M812D4-6 (Heartland Precision Fasteners Inc), HP4812D4-6 (Heartland Precision Fasteners Inc), HLT731DL-8-6 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HLT731DL-8-6 (West Coast Aerospace, Inc.), HLT731TB-8-6 (West Coast Aerospace, Inc.) and 9 more.
Key specifications for ST3M812D4-6: Shank Diameter: 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN; Fastener Length: 0.800 INCHES MINIMUM AND 0.820 INCHES MAXIMUM IN; Head Style: FLUSH COUNTERSUNK; Nominal Thread Size: 0.250 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.