The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-319-2976, 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 11 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-319-2976 |
| Primary Part Number | MILS1222TYI1/213UNC2AX13/4L1 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZW |
| Material Document and Classification | QQ-N-286,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Departure From Cited Document | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| Nondefinitive Spec/std Data | I TYPE AND 500 GRADE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 13 |
| Material | NICKEL ALLOY K-500 OVERALL |
| 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 |
|---|---|
| MILS1222TYI1/213UNC2AX13/4L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 1/2-13UNC-2A X 1 3/4, TYIL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| MIL-S-1222L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| MIL-DTL-1222 | 4/1 Identification reference U.S. Government activity |
| MIL-S-1222 | 5/9 Secondary reference U.S. Government activity |
| 1/2-13UNC-2A X 1 3/4, TYI | 4/1 Identification reference U.S. Government activity |
| MILS1222TYI1/213UNC2AX13/4 | 3/1 Design control — primary reference Naval Sea Systems Command |
| MIL-DTL-1222 QQ-N-286 GR500 | 4/1 Identification reference U.S. Government activity |
| MIL-DTL-1222 QQ-N-286 GR500L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 5305-01-319-2976 is a Screw,cap,hexagon Head, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-319-2976 has 1 manufacturer part number on file: MILS1222TYI1/213UNC2AX13/4L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for MILS1222TYI1/213UNC2AX13/4L1: Criticality Code Justification: ZZZW; Material Document and Classification: QQ-N-286,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 0.500 INCHES IN; Head Style: HEXAGON. 11 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.