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1HB616 — NUT,PLAIN,EXTENDED WASHER,HEXAGO

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1HB616: NUT,PLAIN,EXTENDED WASHER,HEXAGO.

NUT,PLAIN,EXTENDED WASHER,HEXAGO. Key specifications include nut_style: HEXAGON, thread_series: UNEF, overall_height: 0.550 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, width_across_flats: 1.290 INCHES NOMINAL IN, nominal_thread_size: 1.00 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-662-3177, 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
1HB616
NSN: 5310-01-662-3177
FSC: 5310 — Nuts and Washers
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
nut_styleHEXAGON
thread_seriesUNEF
overall_height0.550 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_across_flats1.290 INCHES NOMINAL IN
nominal_thread_size1.00 INCHES IN
end_item_identification4210-01-622-0440;TRUCK,FIRE FIGHTING
washer_outside_diameter1.700 INCHES NOMINAL IN
thread_quantity_per_inch20
part_name_assigned_by_controlling_agencyNUT,YOKE
NSN5310-01-662-3177
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1HB616 · 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
•
WASHER OUTSIDE DIAMETER: 1.700 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 1.290 INCHES NOMINAL IN
•
THREAD SERIES: UNEF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.00 INCHES IN
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.550 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER1.700 INCHES NOMINAL IN
WIDTH ACROSS FLATS1.290 INCHES NOMINAL IN
THREAD SERIESUNEF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.00 INCHES IN
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT,YOKE
NUT STYLEHEXAGON
END ITEM IDENTIFICATION4210-01-622-0440;TRUCK,FIRE FIGHTING
THREAD QUANTITY PER INCH20
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1HB616?
1HB616 is a NUT,PLAIN,EXTENDED WASHER,HEXAGO.
What is the NSN for 1HB616?
1HB616 is cataloged in the U.S. Government catalog under NSN 5310-01-662-3177. 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.