The Stud,locked in, cataloged under National Stock Number 5307-01-545-6491, is classified within Federal Supply Class 5307 (Studs) 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 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-545-6491 |
| Primary Part Number | 820-2177521ITEM23L1 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZX |
| Departure From Cited Designator | 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 |
|---|---|
| 820-2177521ITEM23L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 820-2177521 PIECE 23L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| A-37455-4L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 820-2177521 PIECE 23 | 5/1 Secondary reference U.S. Government activity |
| MIL-S-1222 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-1222 | 4/1 Identification reference U.S. Government activity |
| MIL-S-1222L1 | 5/9 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 820-2177521ITEM23 | 5/1 Secondary reference U.S. Government activity |
| A-37455-4 | 3/1 Design control — primary reference U.S. Government activity |
NSN 5307-01-545-6491 is a Stud,locked in, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-545-6491 has 3 manufacturer part numbers on file: 820-2177521ITEM23L1 (Naval Inventory Control Point Mechanicsburg), 820-2177521 PIECE 23L1 (Naval Inventory Control Point Mechanicsburg), A-37455-4L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 820-2177521ITEM23L1: Criticality Code Justification: ZZZX; Departure From Cited Designator: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS; Part Name Assigned by Controlling Agency: STUD,RING CLAMP; End Item Identification: ITEMS WITH NUCLEAR APPLICATIONS. 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.