The Screw,self-Drilling, cataloged under National Stock Number 5305-01-561-2237, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Fastenal Company Dba Fastenal Co. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-561-2237 |
| Primary Part Number | 1131943 |
| Item Name | Screw,self-Drilling |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Fastenal Company Dba Fastenal Co |
| Status | ACTIVE |
| Extended Washer Thickness | 0.019 INCHES MINIMUM AND 0.019 INCHES MINIMUM AND 0.031 INCHES MAXIMUM0.031 INCHES MAXIMUM IN |
| Head Height | 0.115 INCHES MINIMUM AND 0.115 INCHES MINIMUM AND 0.141 INCHES MAXIMUM0.141 INCHES MAXIMUM IN |
| Fastener Length | 0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.322 INCHES MINIMUM AND 0.322 INCHES MINIMUM AND 0.348 INCHES MAXIMUM0.348 INCHES MAXIMUM IN |
| Spline Major Diameter | 0.40 INCHES NOMINAL0.40 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.164 INCHES0.164 INCHES IN |
| Head Style | HEXAGON EXTENDED WASHERHEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Point Style | SELF-DRILLINGSELF-DRILLING |
| Width Between Flats | 0.244 INCHES MINIMUM AND 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM0.250 INCHES MAXIMUM IN |
| Pilot Length | 0.1812 INCHES MINIMUM AND 0.1812 INCHES MINIMUM AND 0.2008 INCHES MAXIMUM0.2008 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Internal Drive Style | TORXTORX |
| Thread Quantity Per Inch | 1818 |
| Material | STEEL COMP 410 OVERALL |
| 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 |
|---|---|
| 1131943 PRIMARY | Fastenal Company Dba Fastenal Co (USA) |
| Reference | Meaning |
|---|---|
| 94425A510 | 5/9 Secondary reference Mcmaster-Carr Supply Company |
NSN 5305-01-561-2237 is a Screw,self-Drilling, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-561-2237 has 1 manufacturer part number on file: 1131943 (Fastenal Company Dba Fastenal Co).
Key specifications for 1131943: Extended Washer Thickness: 0.019 INCHES MINIMUM AND 0.019 INCHES MINIMUM AND 0.031 INCHES MAXIMUM0.031 INCHES MAXIMUM IN; Head Height: 0.115 INCHES MINIMUM AND 0.115 INCHES MINIMUM AND 0.141 INCHES MAXIMUM0.141 INCHES MAXIMUM IN; Fastener Length: 0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN; Extended Washer Diameter: 0.322 INCHES MINIMUM AND 0.322 INCHES MINIMUM AND 0.348 INCHES MAXIMUM0.348 INCHES MAXIMUM IN. 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.