PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 1/4-28
1/4-28 ✓ 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 1/4-28 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 5310-01-104-1079, 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
1/4-28
NSN: 5310-01-104-1079
FSC: 5310
CAGE: 08863 — NYLOMATIC (USA)
SPECIFICATIONS
Part Number1/4-28
NSN5310-01-104-1079
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1/4-28 · 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 CLASS: 2B
•
NUT STYLE: CAP
•
THREAD DIRECTION: RIGHT-HAND
•
MATERIAL: PLASTIC POLYAMIDE NYLON OVERALL
•
THREAD SERIES: UNF
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
BEARING SURFACE TYPE: FLAT
•
THREAD QUANTITY PER INCH: 28
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B
NUT STYLECAP
THREAD DIRECTIONRIGHT-HAND
MATERIALPLASTIC POLYAMIDE NYLON OVERALL
THREAD SERIESUNF
NOMINAL THREAD SIZE0.250 INCHES IN
BEARING SURFACE TYPEFLAT
THREAD QUANTITY PER INCH28
NUT HEIGHT0.375 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.438 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
B18-2-2Interchangeable
interchangeable cross-reference
interchangeable
1-4-28Interchangeable
interchangeable cross-reference
interchangeable
DWG5120-00-144-2089Interchangeable
interchangeable cross-reference
interchangeable
1519-CHUCK STUDInterchangeable
interchangeable cross-reference
interchangeable
MC73354Interchangeable
interchangeable cross-reference
interchangeable
174-285Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 1/4-28?
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 1/4-28?
1/4-28 is a 1/4-28.
What parts can replace 1/4-28?
There are 20 known substitutes for 1/4-28: B18-2-2, 1-4-28, DWG5120-00-144-2089 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1/4-28?
1/4-28 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-104-1079. 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 — 1/4-28

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