The Screw,lag, cataloged under National Stock Number 5305-00-009-1797, 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16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-009-1797 |
| Item Name | Screw,lag |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Nonmachine Nominal Thread Diameter | 0.250 INCHES IN |
| Head Height | 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Fastener Length | 5.000 INCHES NOMINAL IN |
| Shoulder Length | 0.094 INCHES MINIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | ASTM A153-60 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.237 INCHES MINIMUM AND 0.260 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 60.0 ROCKWELL C NOMINAL OVERALL |
| Nonmachine Thread Style | GIMLET POINT (TYPE A, AB OR BA) |
| Material Document and Classification | FF-B-561,GRADE B FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Head Style | SQUARE |
| Width Between Flats | 0.425 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 1 TYPE AND 1 STYLE AND B GRADE |
| Surface Treatment | ZINC OVERALL |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| MS16992-511 | 2/2 Government specification standardization U.S. Government activity |
| FFB561 | 4/1 Identification reference U.S. Government activity |
NSN 5305-00-009-1797 is a Screw,lag, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-009-1797: Nonmachine Nominal Thread Diameter: 0.250 INCHES IN; Head Height: 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN; Fastener Length: 5.000 INCHES NOMINAL IN; Shoulder Length: 0.094 INCHES MINIMUM FIRST SHOULDER 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.