The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-414-4983, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-414-4983 |
| Primary Part Number | 556-6405334-143 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.625 INCHES NOMINAL IN |
| Head Height | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Fastener Length | 1.750 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A574 ASSN STD 1ST MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | FLAT FILLISTER |
| Locking Feature | PATCH OR PELLET OR STRIP THREADS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 10 |
| Material | STEEL UNS K03104 OVERALL |
| Thread Series Designator | UNRC |
| Head Diameter | 1.107 INCHES MINIMUM AND 1.125 INCHES MAXIMUM 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 |
|---|---|
| 556-6405334-143 PRIMARY | Naval Sea Systems Command (USA) |
| 211048562 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| MILS1222TYII 3/ 4-10UNRC-3AX13/ | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| MILS1222TYII3/4-10UNRC-3AX13/4L | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5305-01-414-4983 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-414-4983 has 2 manufacturer part numbers on file: 556-6405334-143 (Naval Sea Systems Command), 211048562 (Naval Sea Systems Command).
Key specifications for 556-6405334-143: Width Across Flats: 0.625 INCHES NOMINAL IN; Head Height: 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN; Fastener Length: 1.750 INCHES NOMINAL IN; Material Document and Classification: ASTM A574 ASSN STD 1ST MATERIAL RESPONSE OVERALL. 13 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.