The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-641-1267, 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 7 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-641-1267 |
| Primary Part Number | 7383858-DF330613-97-56D4 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZX |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Thread Direction | RIGHT-HAND |
| 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 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 7383858-DF330613-97-56D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| DF330613 FIND NO 56D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 801-6408529 FIND NO 56D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 0.312-18UNC-2AX0.625LG NICUD4 | Naval Inventory Control Point Mechanicsburg (USA) |
| H547-0001-DF330613-97-56D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 801-6408529 FIND NO 56 | 5/1 Secondary reference Naval Sea Systems Command |
| H547-0001-DF330613-97-56 | 5/1 Secondary reference U.S. Government activity |
| 7383858-DF330613-97-56 | 5/1 Secondary reference Naval Sea Systems Command |
| DF330613 FIND NO 56 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 0.312-18UNC-2AX0.625LG NICU | 4/1 Identification reference U.S. Government activity |
NSN 5305-01-641-1267 is a Screw,cap,hexagon Head, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-641-1267 has 5 manufacturer part numbers on file: 7383858-DF330613-97-56D4 (Naval Inventory Control Point Mechanicsburg), DF330613 FIND NO 56D4 (Naval Inventory Control Point Mechanicsburg), 801-6408529 FIND NO 56D4 (Naval Inventory Control Point Mechanicsburg), 0.312-18UNC-2AX0.625LG NICUD4 (Naval Inventory Control Point Mechanicsburg), H547-0001-DF330613-97-56D4 (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-722-1874. Verify interchangeability with system specifications before substitution.
Key specifications for 7383858-DF330613-97-56D4: Criticality Code Justification: ZZZX; Nominal Thread Diameter: 0.312 INCHES IN; Thread Direction: RIGHT-HAND; 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. 7 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.