The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-422-2633, 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 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-422-2633 |
| Primary Part Number | 651-D-7959 ITEML1 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 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 |
|---|---|
| 651-D-7959 ITEML1 | Naval Inventory Control Point Mechanicsburg (USA) |
| MIL-S-1222 GR 400L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 651-D-7959 ITEM 10L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 868-8403L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 651-D-7959 ITEM 10 | 5/1 Secondary reference Aqua-Chem, Inc. |
| 868-8403 | 3/1 Design control — primary reference Aqua-Chem, Inc. |
| MIL-DTL-1222 | 4/1 Identification reference U.S. Government activity |
| 651-D-7959 ITEM | 5/1 Secondary reference Aqua-Chem, Inc. |
NSN 5305-01-422-2633 is a Screw,cap,hexagon Head, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-422-2633 has 4 manufacturer part numbers on file: 651-D-7959 ITEML1 (Naval Inventory Control Point Mechanicsburg), MIL-S-1222 GR 400L1 (Naval Inventory Control Point Mechanicsburg), 651-D-7959 ITEM 10L1 (Naval Inventory Control Point Mechanicsburg), 868-8403L1 (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 4710-01-422-2637. Verify interchangeability with system specifications before substitution.
Key specifications for 651-D-7959 ITEML1: Criticality Code Justification: ZZZY; End Item Identification: COOLER DISTILLATE; Reference Number Differentiating Characteristics: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 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.