The Rivet,blind, cataloged under National Stock Number 5320-01-331-8657, 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 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5320-01-331-8657 |
| Primary Part Number | ST3M781-08-14 |
| Item Name | Rivet,blind |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Shank Diameter | 0.1625 INCHES MINIMUM AND 0.1645 INCHES MAXIMUM IN |
| Lubrication | DRY FILM OR GREASE FILM OR CETYL ALCOHOL OR WAX |
| Expansion Device | THREADED STEM |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE BOLT |
| Head Style | FLUSH (FLAT) COUNTERSUNK (INCLUDED ANGLE - LESS THAN 135 DEG W OR W/O CHAMFER) |
| Grip Length | 0.907 INCHES MINIMUM AND 0.969 INCHES MAXIMUM IN |
| Shank Style | THREADED SELF-PLUGGING SHANK W/SLEEVE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Material | TITANIUM ALLOY UNS R56400 NUT |
| Material | TITANIUM ALLOY UNS R56400 BOLT |
| Material | IRON ALLOY 660 OR STEEL COMP 304 OR STEEL COMP 304L SLEEVE |
| Head Major Diameter | 0.2564 INCHES MINIMUM AND 0.2612 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 |
|---|---|
| BL5-08-14 | Hi-Shear Corporation (USA) |
| BL5-08-14 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M781-08-14 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| PLT1058-5-14 | 5/2 Secondary reference U.S. Government activity |
| PLT1058-5-14 | 5/2 Secondary reference U.S. Government activity |
NSN 5320-01-331-8657 is a Rivet,blind, manufactured by The Boeing Company Div Defense, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-331-8657 has 3 manufacturer part numbers on file: BL5-08-14 (Hi-Shear Corporation), BL5-08-14 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M781-08-14 (The Boeing Company Div Defense).
Key specifications for ST3M781-08-14: Shank Diameter: 0.1625 INCHES MINIMUM AND 0.1645 INCHES MAXIMUM IN; Lubrication: DRY FILM OR GREASE FILM OR CETYL ALCOHOL OR WAX; Expansion Device: THREADED STEM; Material Document and Classification: AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE NUT. 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.