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16600998-014 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

16600998-014: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2011 OVERALL, nut_style: ROUND, nut_diameter: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN, thread_class: 2B, nut_thickness: 0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN, thread_series: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the U.S.

Government catalog under NSN 5310-01-178-3977, 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
16600998-014
NSN: 5310-01-178-3977
FSC: 5310 — Nuts and Washers
CAGE: 28009 — SYPRIS ELECTRONICS, LLC DIV SYPRIS ELECTRONICS, LLC - COLORADO FIELD SERVICES (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2011 OVERALL
nut_styleROUND
nut_diameter0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
thread_class2B
nut_thickness0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
surface_treatmentCHROMATE OVERALL
nominal_thread_size0.112 INCHES IN
thread_quantity_per_inch40
specification/standard_data28009-16600998 MANUFACTURERS SPECIFICATION CONTROL
material_document_and_classificationQQ-A-225/3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-178-3977
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 16600998-014 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541,TYPE 1,GRADE C,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.112 INCHES IN
•
NUT DIAMETER: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
•
SPECIFICATION/STANDARD DATA: 28009-16600998 MANUFACTURERS SPECIFICATION CONTROL
•
NUT THICKNESS: 0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541,TYPE 1,GRADE C,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.112 INCHES IN
NUT DIAMETER0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
SPECIFICATION/STANDARD DATA28009-16600998 MANUFACTURERS SPECIFICATION CONTROL
NUT THICKNESS0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
SURFACE TREATMENTCHROMATE OVERALL
NUT STYLEROUND
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
8151-A-0440-16Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 16600998-014?
16600998-014 is a NUT,PLAIN,ROUND.
What parts can replace 16600998-014?
There is 1 known substitute for 16600998-014: 8151-A-0440-16. Substitute compatibility should be verified for your specific system.
What is the NSN for 16600998-014?
16600998-014 is cataloged in the U.S. Government catalog under NSN 5310-01-178-3977. 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.