The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-535-0031, 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 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-535-0031 |
| Primary Part Number | SS3378-01 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lyn-Tron, Inc. Dba Lyn-Tron Inc |
| Status | ACTIVE |
| Head Height | 0.313 INCHES NOMINAL IN |
| Fastener Length | 0.375 INCHES NOMINAL IN |
| Thread Length | 0.125 INCHES NOMINAL IN |
| Point Chamfer Angle | 90.0 DEGREES NOMINAL |
| Nominal Thread Diameter | 0.209 INCHES IN |
| Head Style | KNURLED NO. 5 |
| Thread Direction | RIGHT-HAND |
| Point Style | CONE |
| Externally Relieved Body Diameter Quantity | 1 |
| Color | NATURAL OVERALL |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.313 INCHES NOMINAL 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 |
|---|---|
| 378SS20 | Matthew Warren, Inc Dba Raf Electronic Hardware Div Raf Electronic Hardware, Llc (USA) |
| SS3378-01 PRIMARY | Lyn-Tron, Inc. Dba Lyn-Tron Inc (USA) |
| 13010011 | Lyn-Tron, Inc. Dba Lyn-Tron Inc (USA) |
| Reference | Meaning |
|---|---|
| 13010011 | 7/2 Vendor item drawing reference Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
NSN 5305-01-535-0031 is a Screw,externally Relieved Body, manufactured by Lyn-Tron, Inc. Dba Lyn-Tron Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-535-0031 has 3 manufacturer part numbers on file: 378SS20 (Matthew Warren, Inc Dba Raf Electronic Hardware Div Raf Electronic Hardware, Llc), SS3378-01 (Lyn-Tron, Inc. Dba Lyn-Tron Inc), 13010011 (Lyn-Tron, Inc. Dba Lyn-Tron Inc).
Key specifications for SS3378-01: Head Height: 0.313 INCHES NOMINAL IN; Fastener Length: 0.375 INCHES NOMINAL IN; Thread Length: 0.125 INCHES NOMINAL IN; Point Chamfer Angle: 90.0 DEGREES NOMINAL. 17 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.