The Block,boom Assembly, cataloged under National Stock Number 3940-01-537-7461, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is Thk Co., Ltd.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 3940-01-537-7461 |
| Primary Part Number | HSR20CB1SS |
| Item Name | Block,boom Assembly |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Thk Co., Ltd. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| HSR20CB1SS | Thk Co., Ltd. (JPN) |
| Reference | Meaning |
|---|---|
| HSR20CB1SS | 3/9 Design control — primary reference Thk Co. Ltd |
NSN 3940-01-537-7461 is a Block,boom Assembly, manufactured by Thk Co., Ltd., classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-537-7461 has 1 manufacturer part number on file: HSR20CB1SS (Thk Co., Ltd.).
Key specifications for HSR20CB1SS: Part Name Assigned by Controlling Agency: BLOCK, BOOM ASSEMBLY; End Item Identification: SUPPORT EQUIPTMENT FOR F-18 FIGHTER AIRCRAFT. 0 specifications are 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.