The Screw,lag, cataloged under National Stock Number 5305-00-252-1538, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-00-252-1538 |
| Item Name | Screw,lag |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Nonmachine Nominal Thread Diameter | 0.625 INCHES IN |
| Head Height | 0.400 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN |
| Fastener Length | 5.900 INCHES MINIMUM AND 6.000 INCHES MAXIMUM IN |
| Shoulder Length | 0.312 INCHES MINIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.605 INCHES MINIMUM AND 0.642 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 60.0 ROCKWELL B MINIMUM OVERALL |
| Nonmachine Thread Style | CONE POINT (TYPE BP) OR GIMLET POINT (TYPE A, AB OR BA) |
| Material Document and Classification | ASTM A307-68,GR A ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Head Style | SQUARE |
| Width Between Flats | 0.906 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 1 TYPE OR 2 TYPE AND 2 STYLE AND B GRADE |
| 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 |
|---|---|
| FFB561 | 4/1 Identification reference U.S. Government activity |
NSN 5305-00-252-1538 is a Screw,lag, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-252-1538: Nonmachine Nominal Thread Diameter: 0.625 INCHES IN; Head Height: 0.400 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN; Fastener Length: 5.900 INCHES MINIMUM AND 6.000 INCHES MAXIMUM IN; Shoulder Length: 0.312 INCHES MINIMUM FIRST SHOULDER IN. 14 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.