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571242 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The COUPLING,SHAFT,RIGID is a the manufacturer industrial component. Key specifications include end_item_identification: PACER DAWN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-057-1242, 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
571242
NSN: 5310-00-057-1242
FSC: 5310
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
end_item_identificationPACER DAWN
NSN5310-00-057-1242
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 571242 · 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 CLASS: 2B
•
NUT STYLE: HEXAGON
•
THREAD SERIES: UNS
•
NOMINAL THREAD SIZE: 1.000 INCHES IN
•
THREAD QUANTITY PER INCH: 14
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
WIDTH ACROSS FLATS: 1.450 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B
NUT STYLEHEXAGON
THREAD SERIESUNS
NOMINAL THREAD SIZE1.000 INCHES IN
THREAD QUANTITY PER INCH14
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
WIDTH ACROSS FLATS1.450 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.831 INCHES MINIMUM AND 0.887 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
MILB857Interchangeable
interchangeable cross-reference
interchangeable
43-N-3938-4610Interchangeable
interchangeable cross-reference
interchangeable
H114AInterchangeable
interchangeable cross-reference
interchangeable
FFB571TYPEA2Interchangeable
interchangeable cross-reference
interchangeable
FFN836GRADEBTYPE3STYLE4Interchangeable
interchangeable cross-reference
interchangeable
FF571TYPEA2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 571242?
571242 is a COUPLING,SHAFT,RIGID.
What parts can replace 571242?
There are 19 known substitutes for 571242: MILB857, 43-N-3938-4610, H114A and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 571242?
571242 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-057-1242. 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