The Turnbuckle, cataloged under National Stock Number 5340-01-571-4640, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is The Crosby Group Llc Dba the Crosby Group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Turnbuckle |
| FSC / FSG | 5340 — Hardware, Commercial (FSG 53) |
| Manufacturers | The Crosby Group Llc Dba the Crosby Group (CAGE 75535); Bullivants Pty Ltd (CAGE Z7788) |
| Parameter | Value |
|---|---|
| NSN | 5340-01-571-4640 |
| Primary Part Number | HG-228 1033072 |
| Item Name | Turnbuckle |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | The Crosby Group Llc Dba the Crosby Group |
| Status | ACTIVE |
| Length | 58.180 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | ASTMA153 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | ROUND OPEN BODY |
| End Style | CLEVIS AND CLOSED EYE |
| Thread Length | 12.000 INCHES NOMINAL BODY IN |
| Material Document and Classification | ASTMF1145 ASSN STD 1ST MATERIAL RESPONSE OVERALL |
| Thread Direction | LEFT-HAND BODY |
| Body Length | 82.180 INCHES NOMINAL IN |
| Surface Treatment | ZINC OVERALL |
| Pinhole Diameter | 0.250 INCHES NOMINAL IN |
| Thread Class | UNS BODY |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) BODY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| HG-228 1033072 PRIMARY | The Crosby Group Llc Dba the Crosby Group (USA) |
| 160140 | Bullivants Pty Ltd (AUS) |
NSN 5340-01-571-4640 is a Turnbuckle, manufactured by The Crosby Group Llc Dba the Crosby Group, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-571-4640 has 2 manufacturer part numbers on file: HG-228 1033072 (The Crosby Group Llc Dba the Crosby Group), 160140 (Bullivants Pty Ltd).
1 possible match (shared part number, not a government interchangeability claim): 5940-01-585-9905. Verify interchangeability with system specifications before substitution.
Key specifications for HG-228 1033072: Length: 58.180 INCHES NOMINAL IN; Surface Treatment Document and Classification: ASTMA153 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Body Style: ROUND OPEN BODY; End Style: CLEVIS AND CLOSED EYE. 13 specifications are documented in the U.S. Government catalog.
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.