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1227S877 — NUT,PLAIN,OCTAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1227S877: NUT,PLAIN,OCTAGON.

The NUT,PLAIN,OCTAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: PLAIN, OCTAGON, nut_height: 0.485 INCHES NOMINAL IN, thread_class: 2B, thread_series: UN, special_features: ONE ROUND PROTRUSION ON BEARING SURFACE. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-007-9941, 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
1227S877
NSN: 5310-00-007-9941
FSC: 5310 — Nuts and Washers
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_stylePLAIN, OCTAGON
nut_height0.485 INCHES NOMINAL IN
thread_class2B
thread_seriesUN
special_featuresONE ROUND PROTRUSION ON BEARING SURFACE
thread_directionRIGHT-HAND
width_across_flats3.812 INCHES NOMINAL IN
nominal_thread_size2.500 INCHES IN
bearing_surface_typeCHAMFERED
counterbore_diameter2.750 INCHES NOMINAL NUT IN
nut_counterbore_depth0.093 INCHES NOMINAL NUT IN
NSN5310-00-007-9941
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1227S877 · 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: 3.812 INCHES NOMINAL IN
•
THREAD SERIES: UN
•
NUT COUNTERBORE DEPTH: 0.093 INCHES NOMINAL NUT IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 2.500 INCHES IN
•
COUNTERBORE DIAMETER: 2.750 INCHES NOMINAL NUT IN
•
NUT HEIGHT: 0.485 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS3.812 INCHES NOMINAL IN
THREAD SERIESUN
NUT COUNTERBORE DEPTH0.093 INCHES NOMINAL NUT IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE2.500 INCHES IN
COUNTERBORE DIAMETER2.750 INCHES NOMINAL NUT IN
NUT HEIGHT0.485 INCHES NOMINAL IN
SPECIAL FEATURESONE ROUND PROTRUSION ON BEARING SURFACE
NUT STYLEPLAIN, OCTAGON
THREAD CLASS2B
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 2
11662296-7Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
A1227S877Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 1227S877?
1227S877 is a NUT,PLAIN,OCTAGON.
What parts can replace 1227S877?
There are 2 known substitutes for 1227S877: 11662296-7, A1227S877. Substitute compatibility should be verified for your specific system.
What is the NSN for 1227S877?
1227S877 is cataloged in the U.S. Government catalog under NSN 5310-00-007-9941. 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.