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PS178J16L — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

PS178J16L: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: HEXAGON, nut_height: 0.406 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT (UNJ), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-729-1967, 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
PS178J16L
NSN: 5310-01-729-1967
FSC: 5310 — Nuts and Washers
CAGE: 66774 — PRECISION AIRCRAFT MACHINING COMPANY, INC. DBA PAMCO DIV PRECISION AIRCRAFT MACHINING CO DBA PAMCO (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleHEXAGON
nut_height0.406 INCHES NOMINAL IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT (UNJ)
thread_directionRIGHT-HAND
width_across_flats1.613 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN
nominal_thread_size1.3125 INCHES IN
thread_quantity_per_inch12.0
part_name_assigned_by_controlling_agencyNUT,HEXAGON
NSN5310-01-729-1967
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: PS178J16L · 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: 1.613 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT (UNJ)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.3125 INCHES IN
•
NUT HEIGHT: 0.406 INCHES NOMINAL IN
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 3B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.613 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL JOINT (UNJ)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.3125 INCHES IN
NUT HEIGHT0.406 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT,HEXAGON
NUT STYLEHEXAGON
THREAD CLASS3B
THREAD QUANTITY PER INCH12.0
MATERIALSTEEL CORROSION RESISTING OVERALL
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is PS178J16L?
PS178J16L is a NUT,PLAIN,HEXAGON.
What is the NSN for PS178J16L?
PS178J16L is cataloged in the U.S. Government catalog under NSN 5310-01-729-1967. 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.