The Rivet,blind, cataloged under National Stock Number 5320-01-686-1937, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Leonardo Spa Helicopters Division - Production Site. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-686-1937 |
| Primary Part Number | NAS1721C5-4W |
| Item Name | Rivet,blind |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Leonardo Spa Helicopters Division - Production Site |
| Status | ACTIVE |
| Shank Diameter | 0.156 INCHES NOMINAL IN |
| Fastener Length | 0.399 INCHES MAXIMUM IN |
| Expansion Device | SERRATED STEM-TYPE W |
| Head Style | FLUSH (FLAT) COUNTERSUNK (INCLUDED ANGLE - LESS THAN 135 DEG W OR W/O CHAMFER) |
| Grip Length | 0.172 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN |
| Shank Style | SELF-PLUGGING MECHANICALLY LOCKED STEM |
| Surface Treatment | CADMIUM SLEEVE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Material | STEEL CORROSION RESISTING SLEEVE |
| Head Major Diameter | 0.286 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 |
|---|---|
| NAS1721C5-4W | Leonardo Spa Helicopters Division - Production Site (ITA) |
| Reference | Meaning |
|---|---|
| NAS1721C5-4W | 3/2 Design control — primary reference U.S. Government activity |
NSN 5320-01-686-1937 is a Rivet,blind, manufactured by Leonardo Spa Helicopters Division - Production Site, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-686-1937 has 1 manufacturer part number on file: NAS1721C5-4W (Leonardo Spa Helicopters Division - Production Site).
Key specifications for NAS1721C5-4W: Shank Diameter: 0.156 INCHES NOMINAL IN; Fastener Length: 0.399 INCHES MAXIMUM IN; Expansion Device: SERRATED STEM-TYPE W; Head Style: FLUSH (FLAT) COUNTERSUNK (INCLUDED ANGLE - LESS THAN 135 DEG W OR W/O CHAMFER). 10 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.