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PartsTable / COMPONENT / 72-1170-303
72-1170-303 ✓ 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,NOZZLE RETAINING is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: STEEL;BLACK OXIDE;2.641 IN. O/A LG;1.750 IN.

OF;W/1.312-12 UN 3B INTERNAL THD ON ONE END;1 IN. ID ON THE OTHER END 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 5310-00-146-8318, 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
72-1170-303
NSN: 5310-00-146-8318
FSC: 5310
CAGE: 50024 — COLTEC INDUSTRIES INC DBA FAIRBANKS MORSE ENGINE FM/ALCO (USA)
SPECIFICATIONS
general_characteristics_item_descriptionSTEEL;BLACK OXIDE;2.641 IN. O/A LG;1.750 IN. OF;W/1.312-12 UN 3B INTERNAL THD ON ONE END;1 IN. ID ON THE OTHER END IN
NSN5310-00-146-8318
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 72-1170-303 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL;BLACK OXIDE;2.641 IN. O/A LG;1.750 IN. OF;W/1.312-12 UN 3B INTERNAL THD ON ONE END;1 IN. ID ON THE OTHER END IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL;BLACK OXIDE;2.641 IN. O/A LG;1.750 IN. OF;W/1.312-12 UN 3B INTERNAL THD ON ONE END;1 IN. ID ON THE OTHER END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
63671Interchangeable
interchangeable cross-reference
interchangeable
B2632Interchangeable
interchangeable cross-reference
interchangeable
25654NInterchangeable
interchangeable cross-reference
interchangeable
72-11700-303Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 72-1170-303?
72-1170-303 is a NUT,NOZZLE RETAINING.
What parts can replace 72-1170-303?
There are 4 known substitutes for 72-1170-303: 63671, B2632, 25654N and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 72-1170-303?
72-1170-303 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-146-8318. 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