The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-641-9433, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-641-9433 |
| Primary Part Number | 0.250-20UNC-3AX.0500 LG STLD4 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZX |
| Departure From Cited Designator | MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PRODURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 0.250-20UNC-3AX.0500 LG STLD4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2641-405-01 ITEM 122D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7550478-264140501-0122D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| G547-0002-264140501-0122D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 264140501-0122D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| G547-0002-264140501-0122 | 5/1 Secondary reference U.S. Government activity |
| 7550478-264140501-0122 | 5/1 Secondary reference Naval Sea Systems Command |
| 264140501-0122 | 5/1 Secondary reference U.S. Government activity |
| 0.250-20UNC-3AX.0500 LG STL | 4/1 Identification reference U.S. Government activity |
| 2641-405-01 ITEM 122 | 5/1 Secondary reference U.S. Government activity |
NSN 5305-01-641-9433 is a Screw,cap,hexagon Head, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-641-9433 has 5 manufacturer part numbers on file: 0.250-20UNC-3AX.0500 LG STLD4 (Naval Inventory Control Point Mechanicsburg), 2641-405-01 ITEM 122D4 (Naval Inventory Control Point Mechanicsburg), 7550478-264140501-0122D4 (Naval Inventory Control Point Mechanicsburg), G547-0002-264140501-0122D4 (Naval Inventory Control Point Mechanicsburg), 264140501-0122D4 (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-657-0427. Verify interchangeability with system specifications before substitution.
Key specifications for 0.250-20UNC-3AX.0500 LG STLD4: Criticality Code Justification: ZZZX; Departure From Cited Designator: MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PRODURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES. 2 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.