The Screw,machine, cataloged under National Stock Number 5305-01-159-8543, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-159-8543 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| Fastener Length | 0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Special Test Features | SPECIAL QUALITY CONTROL TESTING |
| Thread Length | 0.180 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZY |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Screw Material | COPPER ALLOY |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Test Data Document | 81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS AND CERTIFIED FREE FROM MERCURY CONTAMINATION |
| Head Diameter | 0.205 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 904E180 ITEM 54 | 3/1 Design control — primary reference U.S. Government activity |
NSN 5305-01-159-8543 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-159-8543: Head Height: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN; Fastener Length: 0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Special Test Features: SPECIAL QUALITY CONTROL TESTING; Thread Length: 0.180 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN. 16 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.