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EPA21000-274 — NUT,UNION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

EPA21000-274: NUT,UNION.

The NUT,UNION is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: HEXAGON, nut_height: 0.938 INCHES NOMINAL IN, thread_class: 3B, thread_series: UN, shoulder_width: 0.155 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-904-0875, 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
EPA21000-274
NSN: 5310-00-904-0875
NIINs: 009040875, 009040876
FSC: 5310 — Nuts and Washers
CAGE: F3014 — NAVAL GROUP SITE DE BREST (FRA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleHEXAGON
nut_height0.938 INCHES NOMINAL IN
thread_class3B
thread_seriesUN
shoulder_width0.155 INCHES NOMINAL IN
special_featuresNOMINAL PIPE SIZE 0.500
thread_directionRIGHT-HAND
width_across_flats1.375 INCHES NOMINAL IN
nominal_thread_size1.188 INCHES IN
shoulder_step_width0.250 INCHES NOMINAL IN
thread_quantity_per_inch12
NSN5310-00-904-0875
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: EPA21000-274 · 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
SUBSTITUTES & CROSS-REFERENCES 1
A414241-2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 EPA21000-274?
EPA21000-274 is a NUT,UNION.
What parts can replace EPA21000-274?
There is 1 known substitute for EPA21000-274: A414241-2. Substitute compatibility should be verified for your specific system.
What is the NSN for EPA21000-274?
EPA21000-274 is cataloged in the U.S. Government catalog under NSN 5310-00-904-0875. 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.