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Technical Data Sheet
PartsTable / COMPONENT / N-21-B
N-21-B ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include material: WOOD SHELL, body_width: 1.350 INCHES NOMINAL IN, becket_type: THIMBLE, body_height: 1.330 INCHES NOMINAL IN, body_length: 1.350 INCHES NOMINAL IN, load_rating: 1000.0 POUNDS MAXIMUM LBS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3940-00-151-6324, 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
N-21-B
NSN: 3940-00-151-6324
FSC: 3940
CAGE: 75535 — THE CROSBY GROUP LLC DBA THE CROSBY GROUP (USA)
SPECIFICATIONS
materialWOOD SHELL
body_width1.350 INCHES NOMINAL IN
becket_typeTHIMBLE
body_height1.330 INCHES NOMINAL IN
body_length1.350 INCHES NOMINAL IN
load_rating1000.0 POUNDS MAXIMUM LBS
bearing_typePLAIN
shell_length4.000 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
becket_quantity1
sheave_quantity1
attachment_styleFLATTED LOOSE SWIVEL EYE WITH SWIVEL HOOK
NSN3940-00-151-6324
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TRANSFORMER,AUDIO FREQUENCY TITLE COMPONENT PN N-21-B MFR TRANSFORMER,AUDIO FREQ
KEY FEATURES
•
LOAD RATING: 1000.0 POUNDS MAXIMUM LBS
•
CENTER PIN DIAMETER: 0.375 INCHES NOMINAL IN
•
SHEAVE OUTSIDE DIAMETER: 2.250 INCHES NOMINAL IN
•
BECKET QUANTITY: 1
•
SHEAVE QUANTITY: 1
•
TACKLE LOCKING DEVICE: NOT INCLUDED
•
TACKLE ACCOMMODATED TYPE: FIBROUS ROPE
•
ANTITOPPLING DEVICE: NOT INCLUDED
TECHNICAL CHARACTERISTICS (FLIS)
LOAD RATING1000.0 POUNDS MAXIMUM LBS
CENTER PIN DIAMETER0.375 INCHES NOMINAL IN
SHEAVE OUTSIDE DIAMETER2.250 INCHES NOMINAL IN
BECKET QUANTITY1
SHEAVE QUANTITY1
TACKLE LOCKING DEVICENOT INCLUDED
TACKLE ACCOMMODATED TYPEFIBROUS ROPE
ANTITOPPLING DEVICENOT INCLUDED
MAXIMUM TACKLE DIAMETER ACCOMMODATED0.500 INCHES IN
BEARING TYPEPLAIN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
3001EInterchangeable
interchangeable cross-reference
interchangeable
G-105167-5Interchangeable
interchangeable cross-reference
interchangeable
105167-5Interchangeable
interchangeable cross-reference
interchangeable
WKYX-226Interchangeable
interchangeable cross-reference
interchangeable
117C116-1Interchangeable
interchangeable cross-reference
interchangeable
P26F1H6AS1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is N-21-B?
N-21-B is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace N-21-B?
There are 11 known substitutes for N-21-B: 3001E, G-105167-5, 105167-5 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for N-21-B?
N-21-B is cataloged in the Federal Logistics Information System (FLIS) under NSN 3940-00-151-6324. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026