The Pin-Rivet, cataloged under National Stock Number 5320-01-521-9641, 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 12 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-521-9641 |
| Primary Part Number | ST3M813D3-9 |
| 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 |
| Fastener Length | 0.913 INCHES MINIMUM AND 0.933 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | SAE-AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Head Style | FLUSH COUNTERSUNK |
| Nominal Thread Size | 0.190 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| 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 |
|---|---|
| HLT733DL-6-9 | Huck International, Inc (USA) |
| HLT733DL-6-9 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT733DL-6-9 | Hi-Shear Corporation (USA) |
| HLT733DL-6-9 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M813D3-9 PRIMARY | The Boeing Company Div Defense (USA) |
| HLT733DL-6-9 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HP4813D3-9 | Heartland Precision Fasteners Inc (USA) |
| HLT733DL-6-9 | Howmet Global Fastening Systems Inc (USA) |
| HLT733DL-6-9 | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| ST3M813 | 7/1 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5320-01-521-9641 is a Pin-Rivet, manufactured by The Boeing Company Div Defense, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-521-9641 has 9 manufacturer part numbers on file: HLT733DL-6-9 (Huck International, Inc), HLT733DL-6-9 (Sps Technologies, Llc Dba PB Fasteners), HLT733DL-6-9 (Hi-Shear Corporation), HLT733DL-6-9 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M813D3-9 (The Boeing Company Div Defense) and 4 more.
2 possible matches (shared part number, not a government interchangeability claim): 5320-01-727-5339, 5320-01-732-8532. Verify interchangeability with system specifications before substitution.
Key specifications for ST3M813D3-9: Shank Diameter: 0.202 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Fastener Length: 0.913 INCHES MINIMUM AND 0.933 INCHES MAXIMUM IN; Surface Treatment Document and Classification: SAE-AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Head Style: FLUSH COUNTERSUNK. 12 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.