The Rivet,blind, cataloged under National Stock Number 5320-01-131-8494, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 12 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-131-8494 |
| Primary Part Number | BL170-6-4 |
| Item Name | Rivet,blind |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.1970 INCHES MINIMUM AND 0.1990 INCHES MAXIMUM IN |
| 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 | 0.220 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| Shank Style | THREADED SELF-PLUGGING SHANK W/SLEEVE |
| Countersink Angle | 101.0 DEGREES MAXIMUM |
| Material | TITANIUM ALLOY UNS R56400 NUT |
| Material | TITANIUM ALLOY UNS R56400 BOLT |
| Material | STEEL COMP 304 OR STEEL COMP 304L SLEEVE |
| Head Major Diameter | 0.342 INCHES MINIMUM 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 |
|---|---|
| BL170-6-4 PRIMARY | Hi-Shear Corporation (USA) |
| BL170-6-4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PLT170-6-4 PRIMARY | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| Reference | Meaning |
|---|---|
| PLT170-6-4 | 5/9 Secondary reference U.S. Government activity |
| ST3M782-3-4 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| BL6-3-4 | 5/9 Secondary reference Hi-Shear Corporation |
| 10124155 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| PLT170-6-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5320-01-131-8494 is a Rivet,blind, manufactured by Hi-Shear Corporation, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-131-8494 has 3 manufacturer part numbers on file: BL170-6-4 (Hi-Shear Corporation), BL170-6-4 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), PLT170-6-4 (Howmet Global Fastening Systems Inc. Div Voi-Shan Products).
1 possible match (shared part number, not a government interchangeability claim): 5320-01-305-4368. Verify interchangeability with system specifications before substitution.
Key specifications for BL170-6-4: Shank Diameter: 0.1970 INCHES MINIMUM AND 0.1990 INCHES MAXIMUM IN; 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. 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.