The Screw,close Tolerance, cataloged under National Stock Number 5305-01-197-4005, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-197-4005 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.157 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN |
| Fastener Length | 1.603 INCHES MINIMUM AND 1.623 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.306 INCHES MINIMUM AND 0.357 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | ASTM A580 COND. A ASSN STD SINGLE MATERIAL RESPONSE SPRING |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.125 INCHES MINIMUM AND 1.141 INCHES MAXIMUM IN |
| Grip Diameter | 0.3112 INCHES MINIMUM AND 0.3117 INCHES MAXIMUM IN |
| Locking Feature | DETENT BALL GRIP |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 63000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.610 INCHES MINIMUM AND 0.625 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 | X |
| Reference | Meaning |
|---|---|
| MS21125B518 | 5/9 Secondary reference U.S. Government activity |
| MS21125B518 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-197-4005 is a Screw,close Tolerance, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-197-4005: Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.157 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN; Fastener Length: 1.603 INCHES MINIMUM AND 1.623 INCHES MAXIMUM IN. 22 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.