The Screw,machine, cataloged under National Stock Number 5305-01-186-7779, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-186-7779 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fastener Length | 0.375 INCHES NOMINAL IN |
| Screw Material Document and Classification | FF-S-85 TY 1,ST 1S FED SPEC SINGLE MATERIAL RESPONSE |
| Criticality Code Justification | ZZZY |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Screw Material | COPPER ALLOY |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNF |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | C |
| Reference | Meaning |
|---|---|
| 4874-F-25 | 3/1 Design control — primary reference Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa |
| 4874-F | 5/1 Secondary reference Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa |
NSN 5305-01-186-7779 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 5310-01-186-7783, 5310-01-186-7784, 5310-01-186-7785. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-186-7779: Fastener Length: 0.375 INCHES NOMINAL IN; Screw Material Document and Classification: FF-S-85 TY 1,ST 1S FED SPEC SINGLE MATERIAL RESPONSE; Criticality Code Justification: ZZZY; Nominal Thread Diameter: 0.190 INCHES 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.