The Locknut, cataloged under National Stock Number 5310-01-223-4263, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is John Crane, Inc. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Locknut |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | John Crane, Inc (CAGE 71724) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-223-4263 |
| Primary Part Number | H48422-6-A05 |
| Item Name | Locknut |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | John Crane, Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| H48422-6-A05 PRIMARY | John Crane, Inc (USA) |
| H72346-7-5 | John Crane, Inc (USA) |
| Reference | Meaning |
|---|---|
| H71716-7-3 | C/1 Advisory reference — outside the item-of-supply concept Wartsila Lips Inc |
| H71716-8-4 | C/1 Advisory reference — outside the item-of-supply concept Wartsila Lips Inc |
| H-43354-8 | 5/9 Secondary reference John Crane, Inc |
| H-43354-8 | 5/9 Secondary reference Wartsila Lips Inc |
| H48422-6-A05 | C/1 Advisory reference — outside the item-of-supply concept Wartsila Lips Inc |
NSN 5310-01-223-4263 is a Locknut, manufactured by John Crane, Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-223-4263 has 2 manufacturer part numbers on file: H48422-6-A05 (John Crane, Inc), H72346-7-5 (John Crane, Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-371-4625, 5310-01-413-3726. Verify interchangeability with system specifications before substitution.
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.