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4059948 — PISTON,INTERNAL COMBUSTION ENGIN

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4059948: PISTON,INTERNAL COMBUSTION ENGIN.

PISTON,INTERNAL COMBUSTION ENGIN. Key specifications include end_item_identification: ENGINE, part_name_assigned_by_controlling_agency: TOP,PISTON. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-316-7085, 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
4059948
NSN: 5310-01-316-7085
NIINs: 013167085, 016057351
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
end_item_identificationENGINE
part_name_assigned_by_controlling_agencyTOP,PISTON
NSN5310-01-316-7085
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4059948 · 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
•
EXTERNAL STRAIGHT KEY LENGTH: 0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 1.657 INCHES NOMINAL IN
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STYLE DESIGNATOR: KEY
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OUTSIDE DIAMETER: 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
•
PEENING KEY LENGTH: 0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
•
EXTERNAL STRAIGHT KEY WIDTH: 0.242 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 2
TECHNICAL CHARACTERISTICS
EXTERNAL STRAIGHT KEY LENGTH0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS1.657 INCHES NOMINAL IN
STYLE DESIGNATORKEY
OUTSIDE DIAMETER0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
PEENING KEY LENGTH0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
MATERIAL THICKNESS0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
EXTERNAL STRAIGHT KEY WIDTH0.242 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY2
SPECIAL FEATURESKEYS BENT AND IRREGULAR SHAPED ENDS-CENTER HOLE RECESSED
MATERIALNICKEL ALLOY 718 OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
5310PL0750080Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4059948?
4059948 is a PISTON,INTERNAL COMBUSTION ENGIN.
What parts can replace 4059948?
There is 1 known substitute for 4059948: 5310PL0750080. Substitute compatibility should be verified for your specific system.
What is the NSN for 4059948?
4059948 is cataloged in the U.S. Government catalog under NSN 5310-01-316-7085. 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.