The Pin-Rivet, cataloged under National Stock Number 5320-01-491-4532, 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 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-491-4532 |
| Primary Part Number | 3M1255E4L3 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Shank Diameter | 0.280 INCHES NOMINAL IN |
| Lubrication | CETYL ALCOHOL AND DRY FILM |
| Fastener Length | 0.563 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN |
| Head Style | FLUSH COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Grip Length | 0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN |
| Width Between Flats | 0.0947 INCHES MINIMUM AND 0.0967 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Surface Treatment | PASSIVATE OVERALL |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.390 INCHES MINIMUM AND 0.397 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 |
|---|---|
| WC1255E-8L3 | West Coast Aerospace, Inc. (USA) |
| EL1381NF8-3Y | Howmet Global Fastening Systems Inc (USA) |
| 3M1255E4L3 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 3M1255E4L3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5320-01-491-4532 is a Pin-Rivet, manufactured by The Boeing Company Div Defense, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-491-4532 has 3 manufacturer part numbers on file: WC1255E-8L3 (West Coast Aerospace, Inc.), EL1381NF8-3Y (Howmet Global Fastening Systems Inc), 3M1255E4L3 (The Boeing Company Div Defense).
Key specifications for 3M1255E4L3: Shank Diameter: 0.280 INCHES NOMINAL IN; Lubrication: CETYL ALCOHOL AND DRY FILM; Fastener Length: 0.563 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN; Head Style: FLUSH COUNTERSUNK. 15 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.