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A57-206 — ARRESTER,ELECTRICAL SURGE

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

A57-206: ARRESTER,ELECTRICAL SURGE.

The ARRESTER,ELECTRICAL SURGE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1020 OVERALL, nut_style: ROUND, nut_diameter: 3.250 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 0.406 INCHES NOMINAL IN, thread_series: UN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-832-3752, 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
MRO→ MRO_GENERAL→ A57-206
NSN: 5310-00-832-3752
NIINs: 008323752, 015463583
FSC: 5310 — Nuts and Washers
CAGE: 26337 — PARKER-HANNIFIN CORPORATION DIV HYDRAULIC ACCUMULATOR DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP 1020 OVERALL
nut_styleROUND
nut_diameter3.250 INCHES NOMINAL IN
thread_class2B
nut_thickness0.406 INCHES NOMINAL IN
thread_seriesUN
special_featuresASSFC MODEL FCH-63
thread_directionRIGHT-HAND
countersink_angle90.0 DEGREES NOMINAL NUT
drive_point_depth0.125 INCHES NOMINAL IN
drive_point_width0.250 INCHES NOMINAL IN
surface_treatmentCADMIUM OR ZINC OVERALL
NSN5310-00-832-3752
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A57-206 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD SERIES: UN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
DRIVE POINT WIDTH: 0.250 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 2.500 INCHES IN
•
NUT DIAMETER: 3.250 INCHES NOMINAL IN
•
DRIVE POINT DEPTH: 0.125 INCHES NOMINAL IN
•
NUT THICKNESS: 0.406 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
DRIVE POINT WIDTH0.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE2.500 INCHES IN
NUT DIAMETER3.250 INCHES NOMINAL IN
DRIVE POINT DEPTH0.125 INCHES NOMINAL IN
NUT THICKNESS0.406 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
COUNTERSINK ANGLE90.0 DEGREES NOMINAL NUT
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 A57-206?
A57-206 is a ARRESTER,ELECTRICAL SURGE. It is classified as a MRO (MRO_GENERAL).
What is the NSN for A57-206?
A57-206 is cataloged in the U.S. Government catalog under NSN 5310-00-832-3752. 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.