The Turnbuckle, cataloged under National Stock Number 5340-01-431-7384, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-431-7384 |
| Primary Part Number | 6853588 ITEM 3 |
| Item Name | Turnbuckle |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Take-Up Distance | 12.000 INCHES NOMINAL IN |
| Length | 29.540 INCHES NOMINAL IN |
| End Style | CLEVIS AND CLEVIS |
| Material Document and Classification | FF-T-791B,TYPE 1,FORM 1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Locking Device Type | NUT |
| Nominal Thread Size | 1.250 INCHES SECURING PIN HOLE IN |
| Fork Width | 1.750 INCHES NOMINAL IN |
| Surface Treatment | ZINC OVERALL |
| Pinhole Diameter | 1.250 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) SHANK |
| 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 |
|---|---|
| 1032876 | Crosby Group Inc the Mckissick Plant Div (USA) |
| HG-228 1-1/4 X 12 W/LOCKNUTS | Crosby Group Inc the Mckissick Plant Div (USA) |
| 6853588 ITEM 3 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| HG-228 | 5/9 Secondary reference Crosby Group Inc the Mckissick Plant Div |
NSN 5340-01-431-7384 is a Turnbuckle, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-431-7384 has 3 manufacturer part numbers on file: 1032876 (Crosby Group Inc the Mckissick Plant Div), HG-228 1-1/4 X 12 W/LOCKNUTS (Crosby Group Inc the Mckissick Plant Div), 6853588 ITEM 3 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-540-0336. Verify interchangeability with system specifications before substitution.
Key specifications for 6853588 ITEM 3: Take-Up Distance: 12.000 INCHES NOMINAL IN; Length: 29.540 INCHES NOMINAL IN; End Style: CLEVIS AND CLEVIS; Material Document and Classification: FF-T-791B,TYPE 1,FORM 1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 11 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.