The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-371-0879, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Newport Scientific Inc Hygrodynamic Products Div. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-371-0879 |
| Primary Part Number | DIN7991-M8X1X20-10.9-B3B |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Newport Scientific Inc Hygrodynamic Products Div |
| Status | ACTIVE |
| Width Across Flats | 6.0 MILLIMETERS NOMINAL MM |
| External Thread Tolerance Class | 6G G |
| Fastener Length | 20.0 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 1.0 |
| Thread Length | 18.0 MILLIMETERS MINIMUM AND 20.0 MILLIMETERS MAXIMUM MM |
| Nominal Thread Diameter | 8.0 MILLIMETERS MM |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | HEXAGON |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Material | STEEL PROPERTY CLASS 10.9 OVERALL |
| Thread Series Designator | M |
| Head Diameter | 16.0 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| DIN7991-M8X1X20-10.9-B3B | Din Deutsches Institut Fur Normung Ev (DEU) |
| DIN7991-M8X1X20-10.9-B3B PRIMARY | Newport Scientific Inc Hygrodynamic Products Div (USA) |
| Reference | Meaning |
|---|---|
| DIN7991-M8X20-A 2 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5305-01-371-0879 is a Screw,cap,socket Head, manufactured by Newport Scientific Inc Hygrodynamic Products Div, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-371-0879 has 2 manufacturer part numbers on file: DIN7991-M8X1X20-10.9-B3B (Din Deutsches Institut Fur Normung Ev), DIN7991-M8X1X20-10.9-B3B (Newport Scientific Inc Hygrodynamic Products Div).
Key specifications for DIN7991-M8X1X20-10.9-B3B: Width Across Flats: 6.0 MILLIMETERS NOMINAL MM; External Thread Tolerance Class: 6G G; Fastener Length: 20.0 MILLIMETERS NOMINAL MM; Thread Pitch in Millimeters: 1.0. 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.