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AT2057 — TRANSFORMER,AUDIO FREQUENCY

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

AT2057: TRANSFORMER,AUDIO FREQUENCY.

The TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include body_width: 0.781 INCHES NOMINAL IN, body_height: 0.844 INCHES NOMINAL IN, body_length: 0.781 INCHES NOMINAL IN, inclosure_type: OPEN, mounting_method: TERMINAL SINGLE GROUP, frequency_rating: 320.0 HERTZ MINIMUM AND 480.0 HERTZ MAXIMUM SINGLE COMPONENT. This part is cataloged in the U.S.

Government catalog under NSN 4720-00-056-5687, 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
AT2057
NSN: 4720-00-056-5687
NIINs: 000565687, 009614514
FSC: 4720 — Hose and Flexible Tubing
CAGE: 70510 — HYSPAN PRECISION PRODUCTS, INC. (USA)
SPECIFICATIONS
body_width0.781 INCHES NOMINAL IN
body_height0.844 INCHES NOMINAL IN
body_length0.781 INCHES NOMINAL IN
inclosure_typeOPEN
mounting_methodTERMINAL SINGLE GROUP
frequency_rating320.0 HERTZ MINIMUM AND 480.0 HERTZ MAXIMUM SINGLE COMPONENT
reliability_indicatorNOT ESTABLISHED
impedance_rating_in_ohms150.0 NOMINAL SINGLE COMPONENT ALL SECONDARY
terminal_type_and_quantity6 WIRE LEAD
winding_function_and_quantity1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT
primary_to_secondary_turn_ratio1 TO 3/32 SINGLE COMPONENT
NSN4720-00-056-5687
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: AT2057 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
SUBSTITUTES & CROSS-REFERENCES 2
82507Reference document
Same NSN cross-reference
Reference document — Secondary reference
307361Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AT2057?
AT2057 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace AT2057?
There are 2 known substitutes for AT2057: 82507, 307361. Substitute compatibility should be verified for your specific system.
What is the NSN for AT2057?
AT2057 is cataloged in the U.S. Government catalog under NSN 4720-00-056-5687. 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.