The Cap Screw Socket, cataloged under National Stock Number 5305-01-658-8533, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-658-8533 |
| Primary Part Number | M1222SN4C322NCNNL1 |
| Item Name | Cap Screw Socket |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZW |
| Departure From Cited Document | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| 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 |
|---|---|
| M1222SN4C322NCNNL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 0.250-20UNRC-3AX1.375LG NICUALL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| M1222SN4C322NCNN | 4/1 Identification reference U.S. Government activity |
| M1222TYIIGR500L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 0.250-20UNRC-3AX1.375LG NICUAL | 4/1 Identification reference U.S. Government activity |
| M1222TYIIGR500 | 4/1 Identification reference U.S. Government activity |
NSN 5305-01-658-8533 is a Cap Screw Socket, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-658-8533 has 1 manufacturer part number on file: M1222SN4C322NCNNL1 (Naval Inventory Control Point Mechanicsburg).
4 possible matches (shared part number, not a government interchangeability claim): 5305-01-658-8562, 5305-01-660-5369, 5305-01-692-5713. Verify interchangeability with system specifications before substitution.
Key specifications for M1222SN4C322NCNNL1: Criticality Code Justification: ZZZW; Departure From Cited Document: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS. 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.