PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 000.250-28UNF-2B
000.250-28UNF-2B ✓ 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 000.250-28UNF-2B is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-245-2590, 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
000.250-28UNF-2B
NSN: 5310-01-245-2590
FSC: 5310
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
Part Number000.250-28UNF-2B
NSN5310-01-245-2590
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 000.250-28UNF-2B · 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: HEXAGON
•
THREAD CLASS: 2B
•
BEARING SURFACE TYPE: FLAT OR WASHER FACED
•
THREAD SERIES: UNF
•
THREAD QUANTITY PER INCH: 28
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
THREAD CLASS2B
BEARING SURFACE TYPEFLAT OR WASHER FACED
THREAD SERIESUNF
THREAD QUANTITY PER INCH28
CRITICALITY CODE JUSTIFICATIONZZZY
NOMINAL THREAD SIZE0.250 INCHES IN
THREAD DIRECTIONRIGHT-HAND
MATERIAL DOCUMENT AND CLASSIFICATION66 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
WIDTH ACROSS FLATS0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
M45913/1-4FS3Interchangeable
interchangeable cross-reference
interchangeable
1-4-28UNF2BInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-45913/1Interchangeable
interchangeable cross-reference
interchangeable
107304-104Interchangeable
interchangeable cross-reference
interchangeable
1/4-28UNF-2BInterchangeable
interchangeable cross-reference
interchangeable
MIL-S-1222G TY1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 000.250-28UNF-2B?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 000.250-28UNF-2B?
000.250-28UNF-2B is a 000.250-28UNF-2B.
What parts can replace 000.250-28UNF-2B?
There are 22 known substitutes for 000.250-28UNF-2B: M45913/1-4FS3, 1-4-28UNF2B, MIL-DTL-45913/1 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 000.250-28UNF-2B?
000.250-28UNF-2B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-245-2590. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 000.250-28UNF-2B

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026