The Thumbscrew, cataloged under National Stock Number 5305-01-694-6101, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Seitz Scientific Industries, Inc.. Government technical data includes 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-694-6101 |
| Primary Part Number | ML8-4 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Seitz Scientific Industries, Inc. |
| Status | ACTIVE |
| Head Height | 0.3125 INCHES NOMINAL IN |
| Fastener Length | 0.75 INCHES NOMINAL IN |
| Shoulder Length | 0.125 INCHES NOMINAL OVERALL IN |
| Shoulder Diameter | 0.25 INCHES NOMINAL OVERALL IN |
| Thread Length | 0.50 INCHES NOMINAL IN |
| Shoulder Shape | ROUND OVERALL |
| Nominal Thread Diameter | 0.086 INCHES IN |
| Head Style | KNURLED NO. 2 |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE OVERALL |
| Thread Quantity Per Inch | 56 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.3125 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 |
|---|---|
| ML8-4 PRIMARY | Seitz Scientific Industries, Inc. (USA) |
NSN 5305-01-694-6101 is a Thumbscrew, manufactured by Seitz Scientific Industries, Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-694-6101 has 1 manufacturer part number on file: ML8-4 (Seitz Scientific Industries, Inc.).
Key specifications for ML8-4: Head Height: 0.3125 INCHES NOMINAL IN; Fastener Length: 0.75 INCHES NOMINAL IN; Shoulder Length: 0.125 INCHES NOMINAL OVERALL IN; Shoulder Diameter: 0.25 INCHES NOMINAL OVERALL 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.