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M8011971 — BLOCK,TACKLE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

M8011971: BLOCK,TACKLE.

The BLOCK,TACKLE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY BEARING, block_type: SNATCH, load_rating: 31000.0 POUNDS MAXIMUM LBS, shell_length: 6.000 INCHES NOMINAL IN, locking_style: SAFETY LOCKING, attachment_style: FLATTED LOOSE SWIVEL SAFETY SNAP HOOK. This part is cataloged in the U.S.

Government catalog under NSN 3940-01-447-4095, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
M8011971
NSN: 3940-01-447-4095
FSC: 3940 — Blocks, Tackle, Rigging, and Slings
CAGE: 75535 — THE CROSBY GROUP LLC DBA THE CROSBY GROUP (USA)
SPECIFICATIONS
materialCOPPER ALLOY BEARING
block_typeSNATCH
load_rating31000.0 POUNDS MAXIMUM LBS
shell_length6.000 INCHES NOMINAL IN
locking_styleSAFETY LOCKING
sheave_quantity1
attachment_styleFLATTED LOOSE SWIVEL SAFETY SNAP HOOK
style_designatorPULLEY PATTERN
antitoppling_deviceNOT INCLUDED
center_pin_diameter0.375 INCHES NOMINAL IN
tackle_locking_deviceNOT INCLUDED
sheave_outside_diameter2.500 INCHES NOMINAL IN
NSN3940-01-447-4095
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BLOCK,TACKLE TITLE COMPONENT PN M8011971 MFR BLOCK,TACKLE
KEY FEATURES
•
ATTACHMENT STYLE: FLATTED LOOSE SWIVEL SAFETY SNAP HOOK
•
MAXIMUM TACKLE DIAMETER ACCOMMODATED: 0.500 INCHES IN
•
LOAD RATING: 31000.0 POUNDS MAXIMUM LBS
•
TACKLE LOCKING DEVICE: NOT INCLUDED
•
SHEAVE OUTSIDE DIAMETER: 2.500 INCHES NOMINAL IN
•
TACKLE ACCOMMODATED TYPE: WIRE ROPE
•
BLOCK TYPE: SNATCH
•
CENTER PIN DIAMETER: 0.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
ATTACHMENT STYLEFLATTED LOOSE SWIVEL SAFETY SNAP HOOK
MAXIMUM TACKLE DIAMETER ACCOMMODATED0.500 INCHES IN
LOAD RATING31000.0 POUNDS MAXIMUM LBS
TACKLE LOCKING DEVICENOT INCLUDED
SHEAVE OUTSIDE DIAMETER2.500 INCHES NOMINAL IN
TACKLE ACCOMMODATED TYPEWIRE ROPE
BLOCK TYPESNATCH
CENTER PIN DIAMETER0.375 INCHES NOMINAL IN
STYLE DESIGNATORPULLEY PATTERN
LOCKING STYLESAFETY LOCKING
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 3940-00-003-0706 3940-00-004-3568 3940-00-004-9175 3940-00-005-1366 3940-00-005-1367 3940-00-006-3256 3940-00-007-2801
SUBSTITUTES & CROSS-REFERENCES 1
12378672-003Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M8011971?
M8011971 is a BLOCK,TACKLE.
What parts can replace M8011971?
There is 1 known substitute for M8011971: 12378672-003. Substitute compatibility should be verified for your specific system.
What is the NSN for M8011971?
M8011971 is cataloged in the U.S. Government catalog under NSN 3940-01-447-4095. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.