The Screw,close Tolerance, cataloged under National Stock Number 5305-01-531-1124, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is West Coast Aerospace, Inc.. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-531-1124 |
| Primary Part Number | WD4049-4D17 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | West Coast Aerospace, Inc. |
| Status | ACTIVE |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Diameter | 0.250 INCHES NOMINAL IN |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| WD4049-4D17 PRIMARY | West Coast Aerospace, Inc. (USA) |
| ST3M714-4D17 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4049-4D17 PRIMARY | Hi-Shear Corporation (USA) |
| HT4049-4D17 PRIMARY | Huck International, Inc (USA) |
| HT4049-4D17 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4049-4D17 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| ST3M714-4D17 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5305-01-531-1124 is a Screw,close Tolerance, manufactured by West Coast Aerospace, Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-531-1124 has 6 manufacturer part numbers on file: WD4049-4D17 (West Coast Aerospace, Inc.), ST3M714-4D17 (Fastener Innovation Technology, Inc. Dba F I T), HT4049-4D17 (Hi-Shear Corporation), HT4049-4D17 (Huck International, Inc), HT4049-4D17 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 1 more.
Key specifications for WD4049-4D17: Nominal Thread Diameter: 0.250 INCHES IN; Head Style: FLAT COUNTERSUNK; Thread Direction: RIGHT-HAND; Grip Diameter: 0.250 INCHES NOMINAL IN. 9 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.