The Turnbuckle, cataloged under National Stock Number 5340-01-646-6512, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Esmet Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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. Unit of issue: EA.
| Item Name | Turnbuckle |
| FSC / FSG | 5340 — Hardware, Commercial (FSG 53) |
| Manufacturers | Naval Sea Systems Command (CAGE 53711); Esmet Inc (CAGE 79931) |
| Parameter | Value |
|---|---|
| NSN | 5340-01-646-6512 |
| Primary Part Number | XD-4037-AX-MB-737 |
| Item Name | Turnbuckle |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Esmet Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 588-8278410 AY 96, IT 11 | Naval Sea Systems Command (USA) |
| XD-4037-AX-MB-737 PRIMARY | Esmet Inc (USA) |
| Reference | Meaning |
|---|---|
| 588-8278410 | D/9 Drawing number reference only Naval Sea Systems Command |
| XD-4037-AX-MB-737 | 5/9 Secondary reference U.S. Government activity |
NSN 5340-01-646-6512 is a Turnbuckle, manufactured by Esmet Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-646-6512 has 2 manufacturer part numbers on file: 588-8278410 AY 96, IT 11 (Naval Sea Systems Command), XD-4037-AX-MB-737 (Esmet Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4010-01-648-3570, 5340-01-648-4614. Verify interchangeability with system specifications before substitution.
Possible hazard — SDS may be required (DLA HMIC P). 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.