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Technical Data Sheet
PartsTable / COMPONENT / M2570
M2570 ✓ 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 NUT,PLAIN,CASTELLATED,HEXAGON is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: ELECTRODE ELECTROCARDIOGRAPH ADULT PATIENT MONITORING 1000S. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-737-2632, 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
M2570
NSN: 5310-00-737-2632
FSC: 5310
CAGE: 82796 — COLTEC INDUSTRIES INC. DBA FAIRBANKS MORSE ENGINE DIV FAIRBANKS MORSE ENGINE (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencyELECTRODE ELECTROCARDIOGRAPH ADULT PATIENT MONITORING 1000S
NSN5310-00-737-2632
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M2570 · 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: UNIFIED NATIONAL COARSE (UNC)
•
NUT STYLE: CASTELLATED, HEXAGON
•
MATERIAL: STEEL COMP 1213 OVERALL
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH ACROSS FLATS: 0.859 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NUT STYLECASTELLATED, HEXAGON
MATERIALSTEEL COMP 1213 OVERALL
NOMINAL THREAD SIZE0.375 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
WIDTH ACROSS FLATS0.859 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
SURFACE TREATMENTZINC AND DICHROMATE OVERALL
NUT HEIGHT0.266 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
4450Interchangeable
interchangeable cross-reference
interchangeable
1298Interchangeable
interchangeable cross-reference
interchangeable
120073Interchangeable
interchangeable cross-reference
interchangeable
M222Interchangeable
interchangeable cross-reference
interchangeable
KE0008Interchangeable
interchangeable cross-reference
interchangeable
MIL-C-3469Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M2570?
M2570 is a NUT,PLAIN,CASTELLATED,HEXAGON.
What parts can replace M2570?
There are 19 known substitutes for M2570: 4450, 1298, 120073 and 16 more. Substitute compatibility should be verified for your specific system.
Is M2570 still available?
M2570 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026