The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-727-6526, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lyn-Tron, Inc. Dba Lyn-Tron Inc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-727-6526 |
| Primary Part Number | SS3470-00 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lyn-Tron, Inc. Dba Lyn-Tron Inc |
| Status | ACTIVE |
| Point Diameter | 0.165 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN |
| Head Height | 0.5525 INCHES MINIMUM AND 0.5725 INCHES MAXIMUM IN |
| Point Length | 0.1725 INCHES MINIMUM AND 0.2025 INCHES MAXIMUM IN |
| Fastener Length | 0.7975 INCHES MINIMUM AND 0.8275 INCHES MAXIMUM IN |
| Thread Length | 0.2975 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM-A-582 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL |
| Point Chamfer Angle | 85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM |
| First Diameter From Head | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | KNURLED NO. 5 |
| Thread Direction | RIGHT-HAND |
| Point Style | CONE |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.3025 INCHES MINIMUM AND 0.3225 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Internal Drive Style | SLOT |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.500 INCHES MINIMUM AND 0.510 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 |
| Part Number | Manufacturer |
|---|---|
| SS3470-00 PRIMARY | Lyn-Tron, Inc. Dba Lyn-Tron Inc (USA) |
| Reference | Meaning |
|---|---|
| 9-2-5151 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-727-6526 is a Screw,externally Relieved Body, manufactured by Lyn-Tron, Inc. Dba Lyn-Tron Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-727-6526 has 1 manufacturer part number on file: SS3470-00 (Lyn-Tron, Inc. Dba Lyn-Tron Inc).
Key specifications for SS3470-00: Point Diameter: 0.165 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN; Head Height: 0.5525 INCHES MINIMUM AND 0.5725 INCHES MAXIMUM IN; Point Length: 0.1725 INCHES MINIMUM AND 0.2025 INCHES MAXIMUM IN; Fastener Length: 0.7975 INCHES MINIMUM AND 0.8275 INCHES MAXIMUM IN. 20 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.