The Turnbuckle, cataloged under National Stock Number 5340-00-336-2530, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-336-2530 |
| Primary Part Number | S1620-64154 |
| Item Name | Turnbuckle |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 CLEVIS |
| Take-Up Distance | 2.625 INCHES NOMINAL IN |
| Length | 7.562 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-P-8585 MIL SPEC 1ST TREATMENT RESPONSE AND QQ-P-416,TY 2 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Body Style | ROUND CLOSED BODY |
| End Style | CLEVIS AND CLEVIS |
| Material Document and Classification | MIL-6736,TY 1,COND N MIL SPEC 1ST MATERIAL RESPONSE BODY |
| Material Document and Classification | MIL-S-6758,COND D MIL SPEC 2ND MATERIAL RESPONSE END PULL |
| Material Document and Classification | MIL6758,COND D MIL SPEC 3RD MATERIAL RESPONSE ATTACHMENT |
| Nominal Thread Size | 0.250 INCHES BODY IN |
| Body Length | 0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN |
| Fork Width | 0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN |
| Surface Treatment | CHROMATE ZINC AND CADMIUM AND CHROMATE OVERALL |
| Pinhole Diameter | 0.312 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN |
| Thread Class | 3B BODY |
| Material | STEEL COMP 4130 BODY |
| Material | STEEL COMP 4130 ATTACHMENT |
| Material | STEEL COMP 4130 END PULL |
| Thread Series Designator | UNF BODY |
| Metallic Hardness Rating | 34.0 MINIMUM ROCKWELL C AND 38.0 MAXIMUM ROCKWELL C |
| 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 |
|---|---|
| S1620-64154 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| 5340CH34-009-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-00-336-2530 is a Turnbuckle, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-336-2530 has 1 manufacturer part number on file: S1620-64154 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S1620-64154: Furnished Items and Quantity: 2 CLEVIS; Take-Up Distance: 2.625 INCHES NOMINAL IN; Length: 7.562 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-P-8585 MIL SPEC 1ST TREATMENT RESPONSE AND QQ-P-416,TY 2 FED SPEC 2ND TREATMENT RESPONSE OVERALL. 20 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.