The Chain Assembly,single Leg, cataloged under National Stock Number 4010-01-640-8740, is classified within Federal Supply Class 4010 (Chain and Wire Rope) of the Rope, Cable, Chain, and Fittings group. The manufacturer of record is Tronair, Inc. Div Tronair. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4010-01-640-8740 |
| Primary Part Number | K-3090 |
| Item Name | Chain Assembly,single Leg |
| FSC / FSG | 4010 / 40 — Chain and Wire Rope |
| Manufacturer | Tronair, Inc. Div Tronair |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 S HOOK |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4010-01-640-8740 is a Chain Assembly,single Leg, manufactured by Tronair, Inc. Div Tronair, classified under FSC 4010, Chain and Wire Rope. Status: active.
NSN 4010-01-640-8740 has 2 manufacturer part numbers on file: K-3090 (Tronair, Inc. Div Tronair), K-3090 (Boeing Distribution Australia Pty Ltd).
Key specifications for K-3090: Furnished Items and Quantity: 1 S HOOK; Part Name Assigned by Controlling Agency: KIT, SAFETY CHAIN REPLACEMENT, CONSISTS OF CHAIN DOUBLE LOOP 2/0 AND S-HOOK; End Item Identification: MAINTENANCE PLATFORM, MODEL 04-6036-0100. B4 TYPE. 1 specification is documented in the U.S. Government catalog.
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.