The Nut,plain,blind Rivet, cataloged under National Stock Number 5310-01-641-8227, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Div Tridair Products. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-641-8227 |
| Primary Part Number | CA1681-4HS |
| Item Name | Nut,plain,blind Rivet |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Width Across Flats | 0.1875 INCHES NOMINAL IN |
| Head Height | 0.045 INCHES NOMINAL IN |
| Nut Length | 0.611 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS-QQ-P-35 NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | CRES A286 IAW AMS5731 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Shank End Type | CLOSED |
| Head Style | FLAT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.1900 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | BLIND RIVET W/HEX SHANK |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Head Diameter | 0.399 INCHES NOMINAL 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 |
|---|---|
| CA1681-4HS PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| CA1681-( )HS | D/9 Drawing number reference only Howmet Global Fastening Systems Inc. Div Tridair Products |
NSN 5310-01-641-8227 is a Nut,plain,blind Rivet, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-641-8227 has 1 manufacturer part number on file: CA1681-4HS (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for CA1681-4HS: Lubrication: DRY FILM LUBRICANT; Width Across Flats: 0.1875 INCHES NOMINAL IN; Head Height: 0.045 INCHES NOMINAL IN; Nut Length: 0.611 INCHES NOMINAL IN. 17 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.