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NAFB5637E — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

NAFB5637E: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1117 OVERALL, nut_style: ROUND, nut_diameter: 2.500 INCHES NOMINAL IN, thread_class: 3B, nut_thickness: 0.250 INCHES NOMINAL IN, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-540-4155, 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
NAFB5637E
NSN: 5310-00-540-4155
FSC: 5310 — Nuts and Washers
CAGE: 82796 — COLTEC INDUSTRIES INC. DBA FAIRBANKS MORSE ENGINE DIV FAIRBANKS MORSE ENGINE (USA)
SPECIFICATIONS
materialSTEEL COMP 1117 OVERALL
nut_styleROUND
nut_diameter2.500 INCHES NOMINAL IN
thread_class3B
nut_thickness0.250 INCHES NOMINAL IN
thread_seriesUNF
thread_directionRIGHT-HAND
drive_point_depth0.188 INCHES NOMINAL IN
drive_point_width0.312 INCHES NOMINAL IN
nominal_thread_size1.625 INCHES IN
drive_point_quantity4
thread_quantity_per_inch12
NSN5310-00-540-4155
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NAFB5637E · 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: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
DRIVE POINT WIDTH: 0.312 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.625 INCHES IN
•
NUT DIAMETER: 2.500 INCHES NOMINAL IN
•
DRIVE POINT DEPTH: 0.188 INCHES NOMINAL IN
•
NUT THICKNESS: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
DRIVE POINT WIDTH0.312 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.625 INCHES IN
NUT DIAMETER2.500 INCHES NOMINAL IN
DRIVE POINT DEPTH0.188 INCHES NOMINAL IN
NUT THICKNESS0.250 INCHES NOMINAL IN
DRIVE POINT QUANTITY4
NUT STYLEROUND
SUBSTITUTES & CROSS-REFERENCES 2
16102085Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
1610208SReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is NAFB5637E?
NAFB5637E is a NUT,PLAIN,ROUND.
What parts can replace NAFB5637E?
There are 2 known substitutes for NAFB5637E: 16102085, 1610208S. Substitute compatibility should be verified for your specific system.
What is the NSN for NAFB5637E?
NAFB5637E is cataloged in the U.S. Government catalog under NSN 5310-00-540-4155. 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.