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HH159638-8 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

HH159638-8: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.939 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UN, hardness_rating: 2.0 ROCKWELL C NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-199-3108, 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
HH159638-8
NSN: 5310-00-199-3108
FSC: 5310 — Nuts and Washers
CAGE: 7PZX0 — FAIRBANKS MORSE, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.939 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN
thread_class2B
thread_seriesUN
hardness_rating2.0 ROCKWELL C NOMINAL
thread_directionRIGHT-HAND
width_across_flats1.631 INCHES MINIMUM AND 1.687 INCHES MAXIMUM IN
nominal_thread_size1.125 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch8
NSN5310-00-199-3108
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: HH159638-8 · 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: 1.631 INCHES MINIMUM AND 1.687 INCHES MAXIMUM IN
•
THREAD SERIES: UN
•
HARDNESS RATING: 2.0 ROCKWELL C NOMINAL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.125 INCHES IN
•
NUT HEIGHT: 0.939 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.631 INCHES MINIMUM AND 1.687 INCHES MAXIMUM IN
THREAD SERIESUN
HARDNESS RATING2.0 ROCKWELL C NOMINAL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.125 INCHES IN
NUT HEIGHT0.939 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH8
MATERIALSTEEL 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 1
HH159638PC8Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HH159638-8?
HH159638-8 is a NUT,PLAIN,HEXAGON.
What parts can replace HH159638-8?
There is 1 known substitute for HH159638-8: HH159638PC8. Substitute compatibility should be verified for your specific system.
What is the NSN for HH159638-8?
HH159638-8 is cataloged in the U.S. Government catalog under NSN 5310-00-199-3108. 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.