The Rivet,blind, cataloged under National Stock Number 5320-01-521-9679, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Div Voi-Shan Products. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5320-01-521-9679 |
| Primary Part Number | 3M1121-4-6 |
| Item Name | Rivet,blind |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Voi-Shan Products |
| Status | ACTIVE |
| Shank Diameter | 0.263 INCHES MINIMUM AND 0.264 INCHES MAXIMUM IN |
| Width Across Flats | 0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Head Height | 0.084 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Material Document and Classification | SAE-AMS4928 ASSN STD SINGLE MATERIAL RESPONSE BOLT |
| Material Document and Classification | SAE-AMS4928 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Head Style | HEXAGON |
| Grip Length | 0.345 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN |
| Shank Style | THREADED SELF-PLUGGING SHANK W/SLEEVE |
| Material | STEEL CORROSION RESISTING SLEEVE |
| Material | TITANIUM ALLOY NUT |
| Material | TITANIUM ALLOY BOLT |
| 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 |
|---|---|
| 3M1121-4-6 PRIMARY | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| Reference | Meaning |
|---|---|
| 3M1121 | 5/9 Secondary reference The Boeing Company Div Defense |
| 3M1121-4-6 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 3M1121-4-6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5320-01-521-9679 is a Rivet,blind, manufactured by Howmet Global Fastening Systems Inc. Div Voi-Shan Products, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-521-9679 has 1 manufacturer part number on file: 3M1121-4-6 (Howmet Global Fastening Systems Inc. Div Voi-Shan Products).
2 possible matches (shared part number, not a government interchangeability claim): 5320-01-521-9680, 5320-01-726-7677. Verify interchangeability with system specifications before substitution.
Key specifications for 3M1121-4-6: Shank Diameter: 0.263 INCHES MINIMUM AND 0.264 INCHES MAXIMUM IN; Width Across Flats: 0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Head Height: 0.084 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN; Material Document and Classification: SAE-AMS4928 ASSN STD SINGLE MATERIAL RESPONSE BOLT. 11 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.