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1227R252 — Technical Data Sheet

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— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System under NSN 5310-00-639-7544, 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
1227R252
NSN: 5310-00-639-7544
FSC: 5310
CAGE: 3D6E9 — MERITOR INDUSTRIAL PRODUCTS, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
nominal_thread_size0.500 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch20
NSN5310-00-639-7544
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1227R252 · 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
•
MATERIAL: STEEL OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH ACROSS FLATS: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
BEARING SURFACE TYPE: WASHER FACED
•
THREAD SERIES: UNF
•
THREAD QUANTITY PER INCH: 20
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
MATERIALSTEEL OVERALL
THREAD DIRECTIONRIGHT-HAND
WIDTH ACROSS FLATS0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.500 INCHES IN
BEARING SURFACE TYPEWASHER FACED
THREAD SERIESUNF
THREAD QUANTITY PER INCH20
NUT STYLEHEXAGON
NUT HEIGHT0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
137142InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
345898PC516InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
N48InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
B94.11MInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2410 5/32InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
C12052InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1227R252?
1227R252 is a NUT,PLAIN,HEXAGON.
What parts can replace 1227R252?
There are 20 known substitutes for 1227R252: 137142, 345898PC516, N48 and 17 more. Substitute compatibility should be verified for your specific system.
Is 1227R252 still available?
1227R252 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026