The Setscrew, cataloged under National Stock Number 5305-01-487-5391, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-487-5391 |
| Primary Part Number | 581-6726888 FIND 21 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Fastener Length | 1.875 INCHES NOMINAL IN |
| Point Chamfer Angle | 90.0 DEGREES NOMINAL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 10 |
| Material | PLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 581-6726888 FIND 21 PRIMARY | Naval Sea Systems Command (USA) |
| 14848630 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| DF2011-280 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6726888 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 5305-01-487-5391 is a Setscrew, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-487-5391 has 2 manufacturer part numbers on file: 581-6726888 FIND 21 (Naval Sea Systems Command), 14848630 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-487-5395. Verify interchangeability with system specifications before substitution.
Key specifications for 581-6726888 FIND 21: Fastener Length: 1.875 INCHES NOMINAL IN; Point Chamfer Angle: 90.0 DEGREES NOMINAL; Nominal Thread Diameter: 0.750 INCHES IN; Head Style: HEADLESS (SETSCREW). 11 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.