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PT028-003 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

PT028-003: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, nut_style: HEXAGON, nut_height: 0.250 INCHES NOMINAL IN, thread_series: UNM, special_features: MOTOR NUT FOR KPH-130 PISTON HORN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-513-7467, 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
PT028-003
NSN: 5310-01-513-7467
FSC: 5310 — Nuts and Washers
CAGE: 75214 — KAHLENBERG INDUSTRIES, INC. DBA KAHLENBERG INDUSTRIES INC (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
nut_styleHEXAGON
nut_height0.250 INCHES NOMINAL IN
thread_seriesUNM
special_featuresMOTOR NUT FOR KPH-130 PISTON HORN
thread_directionRIGHT-HAND
width_across_flats1.310 INCHES NOMINAL IN
nominal_thread_size1.5 MILLIMETERS MM
bearing_surface_typeCHAMFERED
end_item_identificationKPH-130 PISTON HORN
hole_configuration_styleCONFIGURATION A
hole_nominal_thread_diameter25.0 MILLIMETERS MM
NSN5310-01-513-7467
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: PT028-003 · 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
•
WIDTH ACROSS FLATS: 1.310 INCHES NOMINAL IN
•
THREAD SERIES: UNM
•
HOLE CONFIGURATION STYLE: CONFIGURATION A
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.5 MILLIMETERS MM
•
NUT HEIGHT: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.310 INCHES NOMINAL IN
THREAD SERIESUNM
HOLE CONFIGURATION STYLECONFIGURATION A
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.5 MILLIMETERS MM
NUT HEIGHT0.250 INCHES NOMINAL IN
SPECIAL FEATURESMOTOR NUT FOR KPH-130 PISTON HORN
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT, MOTOR SHAFT
NUT STYLEHEXAGON
END ITEM IDENTIFICATIONKPH-130 PISTON HORN
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

No substitute or cross-reference records for this part.

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 PT028-003?
PT028-003 is a NUT,PLAIN,HEXAGON.
What is the NSN for PT028-003?
PT028-003 is cataloged in the U.S. Government catalog under NSN 5310-01-513-7467. 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.