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99637A239 — NUT,PLAIN,BARREL

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

99637A239: NUT,PLAIN,BARREL.

The NUT,PLAIN,BARREL is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_length: 0.750 INCHES NOMINAL IN, nut_diameter: 0.9375 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), flange_thickness: 0.21875 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-706-0686, 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
99637A239
NSN: 5310-01-706-0686
FSC: 5310 — Nuts and Washers
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_length0.750 INCHES NOMINAL IN
nut_diameter0.9375 INCHES NOMINAL IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
flange_thickness0.21875 INCHES NOMINAL IN
special_featuresSECOND MATERIAL IS STEEL CHROME
thread_directionRIGHT-HAND
nominal_thread_size0.3750 INCHES IN
end_item_identification5419-01-580-7055
thread_quantity_per_inch16
part_name_assigned_by_controlling_agencyTRUSS HEAD SEX BOLT-FEMALE BARRELS
NSN5310-01-706-0686
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 99637A239 · 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
•
NUT LENGTH: 0.750 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.21875 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.3750 INCHES IN
•
NUT DIAMETER: 0.9375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
NUT LENGTH0.750 INCHES NOMINAL IN
FLANGE THICKNESS0.21875 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.3750 INCHES IN
NUT DIAMETER0.9375 INCHES NOMINAL IN
SPECIAL FEATURESSECOND MATERIAL IS STEEL CHROME
PART NAME ASSIGNED BY CONTROLLING AGENCYTRUSS HEAD SEX BOLT-FEMALE BARRELS
THREAD CLASS2B
END ITEM IDENTIFICATION5419-01-580-7055
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
4JKJ9Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 99637A239?
99637A239 is a NUT,PLAIN,BARREL.
What parts can replace 99637A239?
There is 1 known substitute for 99637A239: 4JKJ9. Substitute compatibility should be verified for your specific system.
What is the NSN for 99637A239?
99637A239 is cataloged in the U.S. Government catalog under NSN 5310-01-706-0686. 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.