The Rivet,blind, cataloged under National Stock Number 5320-01-371-7951, 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 14 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-371-7951 |
| Primary Part Number | ST3M781-08-4 |
| Item Name | Rivet,blind |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Voi-Shan Products |
| Status | ACTIVE |
| Shank Diameter | 0.1625 INCHES MINIMUM AND 0.1645 INCHES MAXIMUM IN |
| Fastener Length | 1.158 INCHES NOMINAL IN |
| Expansion Device | SERRATED STEM-TYPE W |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Head Style | FLUSH (FLAT) COUNTERSUNK (INCLUDED ANGLE - LESS THAN 135 DEG W OR W/O CHAMFER) |
| Grip Length | 0.220 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| Shank Style | THREADED SELF-PLUGGING SHANK W/SLEEVE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Shear Strength | 3150 DOUBLE POUNDS PER SQUARE INCH |
| Material | STEEL COMP 304 SLEEVE |
| Material | TITANIUM ALLOY UNS R56400 STEM |
| Material | TITANIUM ALLOY UNS R56400 NUT |
| Head Major Diameter | 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 |
|---|---|
| BL1058-5-4 | Hi-Shear Corporation (USA) |
| ST3M781-08-4 PRIMARY | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| ST3M781-08-4 PRIMARY | Hi-Shear Corporation (USA) |
| PLT1058-5-4 | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| ST3M781-08-4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BL1058-5-4 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| 10118934 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST3M781-08-4 | 5/9 Secondary reference U.S. Government activity |
| PLT1058-5-4 | 5/9 Secondary reference U.S. Government activity |
| ST3M781-08-4 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M781-08-4 | 3/2 Design control — primary reference U.S. Government activity |
| PLT1058-5-4 | 5/2 Secondary reference U.S. Government activity |
NSN 5320-01-371-7951 is a Rivet,blind, manufactured by Howmet Global Fastening Systems Inc. Div Voi-Shan Products, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-371-7951 has 6 manufacturer part numbers on file: BL1058-5-4 (Hi-Shear Corporation), ST3M781-08-4 (Howmet Global Fastening Systems Inc. Div Voi-Shan Products), ST3M781-08-4 (Hi-Shear Corporation), PLT1058-5-4 (Howmet Global Fastening Systems Inc. Div Voi-Shan Products), ST3M781-08-4 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 1 more.
Key specifications for ST3M781-08-4: Shank Diameter: 0.1625 INCHES MINIMUM AND 0.1645 INCHES MAXIMUM IN; Fastener Length: 1.158 INCHES NOMINAL IN; Expansion Device: SERRATED STEM-TYPE W; Material Document and Classification: AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE NUT. 14 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.