The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-603-7733, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems Land & Armaments L.p.. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-603-7733 |
| Primary Part Number | 6444900-12M1 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Bae Systems Land & Armaments L.p. |
| Status | ACTIVE |
| Extended Washer Thickness | 1.5 MILLIMETERS MAXIMUM MM |
| Head Height | 6.6 MILLIMETERS NOMINAL MM |
| External Thread Tolerance Class | 6G G |
| Fastener Length | 16.0 MILLIMETERS NOMINAL MM |
| Surface Treatment Document and Classification | MAGNI 565 MILITARY IAW ASTM F1137 GROUP 111 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 14.2 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 1.0 |
| Thread Length | 16.0 MILLIMETERS NOMINAL MM |
| Nominal Thread Diameter | 6.0 MILLIMETERS MM |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 10.0 MILLIMETERS NOMINAL MM |
| Color | GRAY/GREY OVERALL |
| Material | STEEL PROPERTY CLASS 10.9 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 |
|---|---|
| 6444900-12M1 | Amz Alabama Inc. (USA) |
| 6444900-12M1 PRIMARY | Bae Systems Land & Armaments L.p. (USA) |
| 6444900-12M1 PRIMARY | O'gara-Hess & Eisenhardt Armoring Company Llc (USA) |
| Reference | Meaning |
|---|---|
| 6444900-12M1 | 5/9 Secondary reference Bae Systems Survivability Systems Llc |
| 6444900 | D/9 Drawing number reference only Bae Systems Survivability Systems Llc |
NSN 5305-01-603-7733 is a Screw,cap,hexagon Head, manufactured by Bae Systems Land & Armaments L.p., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-603-7733 has 3 manufacturer part numbers on file: 6444900-12M1 (Amz Alabama Inc.), 6444900-12M1 (Bae Systems Land & Armaments L.p.), 6444900-12M1 (O'gara-Hess & Eisenhardt Armoring Company Llc).
2 possible matches (shared part number, not a government interchangeability claim): 5306-01-641-0313, 5305-01-641-2435. Verify interchangeability with system specifications before substitution.
Key specifications for 6444900-12M1: Extended Washer Thickness: 1.5 MILLIMETERS MAXIMUM MM; Head Height: 6.6 MILLIMETERS NOMINAL MM; External Thread Tolerance Class: 6G G; Fastener Length: 16.0 MILLIMETERS NOMINAL MM. 15 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.