The Screw,machine, cataloged under National Stock Number 5305-00-413-7511, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 14 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. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-413-7511 |
| Primary Part Number | 6851 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Head Height | 0.344 INCHES NOMINAL IN |
| Screw Surface Treatment | NICKEL |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Screw Material Document and Classification | QQ-B-626,1/2 HARD FED SPEC SINGLE MATERIAL RESPONSE |
| Thread Length | 0.250 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | KNURLED NO. 2 |
| Thread Direction | RIGHT-HAND |
| Screw Material | COPPER ALLOY 260 |
| Internal Drive Style | SLOT |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.625 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 |
|---|---|
| 6851 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
NSN 5305-00-413-7511 is a Screw,machine, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-413-7511 has 1 manufacturer part number on file: 6851 (Lockheed Martin Corporation Div Rms - Mitchel Field).
3 possible matches (shared part number, not a government interchangeability claim): 5945-01-214-4136, 5331-01-278-1748, 1560-01-603-1455. Verify interchangeability with system specifications before substitution.
Key specifications for 6851: Head Height: 0.344 INCHES NOMINAL IN; Screw Surface Treatment: NICKEL; Fastener Length: 0.250 INCHES NOMINAL IN; Screw Material Document and Classification: QQ-B-626,1/2 HARD FED SPEC SINGLE MATERIAL RESPONSE. 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.