The Setscrew, cataloged under National Stock Number 5305-01-470-1804, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-470-1804 |
| Primary Part Number | 21520722 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Quantity Per Inch | 20 |
| 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 |
|---|---|
| 21520722 PRIMARY | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| 21520722 | 3/9 Design control — primary reference Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco |
NSN 5305-01-470-1804 is a Setscrew, manufactured by Fairbanks Morse, Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-470-1804 has 1 manufacturer part number on file: 21520722 (Fairbanks Morse, Llc).
Key specifications for 21520722: Nominal Thread Diameter: 0.250 INCHES IN; Special Features: FUEL PUMP CONTROL SHAFT AND LEVERS, SET SCREW, 1/4-20 X 1/4 IN.,SOCKET HEAD IN; Part Name Assigned by Controlling Agency: SET SCREW,RETAINER DOG TO SHAFT; End Item Identification: ALCO 251 MARINE DIESEL ENG.. 2 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.