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4255977 — ROD,PISTON,LINEAR ACTUATING CYLI

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4255977: ROD,PISTON,LINEAR ACTUATING CYLI.

ROD,PISTON,LINEAR ACTUATING CYLI. This part is cataloged in the U.S. Government catalog under NSN 5310-00-020-4738, 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
4255977
NSN: 5310-00-020-4738
NIINs: 000204738, 014750458
FSC: 5310 — Nuts and Washers
CAGE: 6N299 — AGCO CORP PARTS OPN (USA)
SPECIFICATIONS
end_item_identificationCONTRACTOR LOGISTICS LIFETIME SUPPORT (CRLS), HYDRAULIC EXCAVTOR TYPE 1 (HYEX) (MODEL 230 LCR HX1), NSN 3805-01-463-0804, TM5-3805-280-24-P
NSN5310-00-020-4738
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4255977 · 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
•
WIDTH ACROSS FLATS: 0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN
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SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
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THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
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PRECIOUS MATERIAL: SILVER
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TEMP RATING: 1200.0 FAHRENHEIT NOMINAL DEGF
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MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5642 ASSN STD ALL MATERIAL RESPONSES OVERALL
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THREAD DIRECTION: RIGHT-HAND
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NOMINAL THREAD SIZE: 0.375 INCHES IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
PRECIOUS MATERIALSILVER
TEMP RATING1200.0 FAHRENHEIT NOMINAL DEGF
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5642 ASSN STD ALL MATERIAL RESPONSES OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT0.455 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
74255977Reference 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 4255977?
4255977 is a ROD,PISTON,LINEAR ACTUATING CYLI.
What parts can replace 4255977?
There is 1 known substitute for 4255977: 74255977. Substitute compatibility should be verified for your specific system.
What is the NSN for 4255977?
4255977 is cataloged in the U.S. Government catalog under NSN 5310-00-020-4738. 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.