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PartsTable / COMPONENT / 39251-1
39251-1 ✓ 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

ADAPTER,AIR INLET,HEAT EXCHANGER. Key specifications include general_characteristics_item_description: METAL; 4.000 IN. NOMINAL BODY LENGTH; 2.750 IN.

WIDE IN. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-044-5223, 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
39251-1
NSN: 5310-01-044-5223
FSC: 5310
CAGE: 71279 — INTERCONNECTION PRODUCTS INC (USA)
SPECIFICATIONS
general_characteristics_item_descriptionMETAL; 4.000 IN. NOMINAL BODY LENGTH; 2.750 IN. WIDE IN
NSN5310-01-044-5223
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 39251-1 · 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
•
NUT STYLE: CLINCH
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: COPPER ALLOY 360 OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
NUT HEIGHT: 0.296 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
•
NOMINAL THREAD SIZE: 0.086 INCHES IN
•
COUNTERBORE DIAMETER: 0.098 INCHES MINIMUM AND 0.101 INCHES MAXIMUM FIRST END IN
•
NUT COUNTERBORE DEPTH: 0.062 INCHES MINIMUM AND 0.094 INCHES MAXIMUM FIRST END IN
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLECLINCH
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALCOPPER ALLOY 360 OVERALL
SURFACE TREATMENTCADMIUM OVERALL
NUT HEIGHT0.296 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.086 INCHES IN
COUNTERBORE DIAMETER0.098 INCHES MINIMUM AND 0.101 INCHES MAXIMUM FIRST END IN
NUT COUNTERBORE DEPTH0.062 INCHES MINIMUM AND 0.094 INCHES MAXIMUM FIRST END IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
WIDTH ACROSS FLATS0.154 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
H9-195062CInterchangeable
interchangeable cross-reference
interchangeable
392511Interchangeable
interchangeable cross-reference
interchangeable
12M2T-12JFX-42Interchangeable
interchangeable cross-reference
interchangeable
144AJK106Interchangeable
interchangeable cross-reference
interchangeable
9600B-0256-3Interchangeable
Same NIIN cross-reference
interchangeable
532661-3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 39251-1?
39251-1 is a ADAPTER,AIR INLET,HEAT EXCHANGER.
What parts can replace 39251-1?
There are 6 known substitutes for 39251-1: H9-195062C, 392511, 12M2T-12JFX-42 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 39251-1?
39251-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-044-5223. 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