NSN 3940-01-555-7971 — this item is cataloged by the U.S. Government under National Stock Number 3940-01-555-7971. Manufacturer of record part number: HK-121-1.
Also searched as3940-01-555-7971 ·
3940015557971 ·
NIIN 015557971 ·
01-555-7971 ·
FSC 3940 Blocks, Tackle, Rigging, and Slings · CAGE 08484 · HK-121-1
Nearby stock numbers← 3940-01-555-3754 Block, Tackle
·
3940-01-556-0986 Sling and Wire Rope Assembly Set →
Features
Hook Block Assembly — FSC 3940
1 manufacturer part number on file
Manufacturer of record: Breeze-Eastern Llc
Identification
NSN: 3940-01-555-7971
NIIN: 015557971
FSC: 3940 — Blocks, Tackle, Rigging, and Slings
FSG: 39 — Materials Handling Equipment
Primary part number: HK-121-1
Manufacturer: Breeze-Eastern Llc
General Description
The Hook Block Assembly, cataloged under National Stock Number 3940-01-555-7971, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is Breeze-Eastern Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Other items in FSC 3940 — Blocks, Tackle, Rigging, and Slings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3940-00-000-0169
3940-00-000-0169 · Item name not on file
3940-00-003-0706
BLOCK-WD12IN SNATCH
3940-00-004-3568
3940-00-004-3568 · Item name not on file
3940-00-004-9175
SLING,PALLET
3940-00-005-1366
3940-00-005-1366 · Item name not on file
3940-00-005-1367
3940-00-005-1367 · Item name not on file
3940-00-006-3256
3940-00-006-3256 · Item name not on file
3940-00-007-2801
ADAPTER,HOISTING
Frequently Asked Questions
What is NSN 3940-01-555-7971?
NSN 3940-01-555-7971 is a Hook Block Assembly, manufactured by Breeze-Eastern Llc, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
What part numbers are listed for NSN 3940-01-555-7971?
NSN 3940-01-555-7971 has 1 manufacturer part number on file: HK-121-1 (Breeze-Eastern Llc).
What are the specifications of HK-121-1?
Key specifications for HK-121-1: End Item Identification: AUGUSTA AB-412-SP. 0 specifications are documented in the U.S. Government catalog.
Is NSN 3940-01-555-7971 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.