Also searched as3940-01-631-8597 ·
3940016318597 ·
NIIN 016318597 ·
01-631-8597 ·
FSC 3940 Blocks, Tackle, Rigging, and Slings
Nearby stock numbers← 3940-01-631-7588 Webbing Assembly, Single Leg
·
3940-01-631-9949 Sling Assembly, Vehicle Lifting →
Features
Block,tackle — FSC 3940
Maximum Tackle Diameter Accommodated: 0.3125 INCHES IN
Tackle Locking Device: NOT INCLUDED
Sheave Outside Diameter: 105.0 MILLIMETERS NOMINAL MM
Block Type: REGULAR
Style Designator: RECTANGULAR PATTERN
Shell Length: 5.875 INCHES NOMINAL IN
Sheave Quantity: 1
Identification
NSN: 3940-01-631-8597
NIIN: 016318597
FSC: 3940 — Blocks, Tackle, Rigging, and Slings
FSG: 39 — Materials Handling Equipment
General Description
The Block,tackle, cataloged under National Stock Number 3940-01-631-8597, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3940-01-631-8597
Item Name
Block,tackle
FSC / FSG
3940 / 39 — Blocks, Tackle, Rigging, and Slings
Status
ACTIVE
Maximum Tackle Diameter Accommodated
0.3125 INCHES IN
Tackle Locking Device
NOT INCLUDED
Sheave Outside Diameter
105.0 MILLIMETERS NOMINAL MM
Block Type
REGULAR
Style Designator
RECTANGULAR PATTERN
Shell Length
5.875 INCHES NOMINAL IN
Sheave Quantity
1
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
29902100
3/9Design control — primary reference
Lewmar, Inc.
No interchangeability data on file.
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 3940-01-631-8597?
NSN 3940-01-631-8597 is a Block,tackle, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
What are the specifications of 3940-01-631-8597?
Key specifications for 3940-01-631-8597: Maximum Tackle Diameter Accommodated: 0.3125 INCHES IN; Tackle Locking Device: NOT INCLUDED; Sheave Outside Diameter: 105.0 MILLIMETERS NOMINAL MM; Block Type: REGULAR. 7 specifications are documented in the U.S. Government catalog.
Is NSN 3940-01-631-8597 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.