The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-141-0438, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lehigh Armstrong Inc. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-141-0438 |
| Primary Part Number | M8X40 DIN 931 STL |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lehigh Armstrong Inc |
| Status | ACTIVE |
| Head Height | 5.5 MILLIMETERS NOMINAL MM |
| Fastener Length | 40.00 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 1.25 |
| Thread Length | 25.0 MILLIMETERS MINIMUM MM |
| Hardness Rating | 18.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | DIN931 8.8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 8.0 MILLIMETERS MM |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 13.0 MILLIMETERS NOMINAL MM |
| Minimum Tensile Strength | 113000 POUNDS PER SQUARE INCH LBS |
| Material | STEEL PROPERTY CLASS 8.8 OVERALL |
| Thread Series Designator | M |
| 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 |
|---|---|
| M8X40 DIN 931 STL PRIMARY | Lehigh Armstrong Inc (USA) |
| Reference | Meaning |
|---|---|
| C0ML M8X40MM | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| C0ML M8X40MM | C/1 Advisory reference — outside the item-of-supply concept Lehigh Armstrong Inc |
NSN 5305-01-141-0438 is a Screw,cap,hexagon Head, manufactured by Lehigh Armstrong Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-141-0438 has 1 manufacturer part number on file: M8X40 DIN 931 STL (Lehigh Armstrong Inc).
Key specifications for M8X40 DIN 931 STL: Head Height: 5.5 MILLIMETERS NOMINAL MM; Fastener Length: 40.00 MILLIMETERS NOMINAL MM; Thread Pitch in Millimeters: 1.25; Thread Length: 25.0 MILLIMETERS MINIMUM MM. 13 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.