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PartsTable / COMPONENT / S227-1
S227-1 ✓ Verified by PartsTable
— · 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 COMP 4140H OVERALL, nut_style: HEXAGON, nut_height: 0.740 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-222-7240, 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
S227-1
NSN: 5310-00-222-7240
FSC: 5310
CAGE: 04969 — AVAILABLE TRUCK CO (USA)
SPECIFICATIONS
materialSTEEL COMP 4140H OVERALL
nut_styleHEXAGON
nut_height0.740 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
countersink_angle90.0 DEGREES NOMINAL NUT
width_across_flats0.931 INCHES MINIMUM AND 0.945 INCHES MAXIMUM IN
nominal_thread_size0.625 INCHES IN
bearing_surface_typeWASHER FACED
bearing_surface_finish125.0 MICROINCHES
thread_quantity_per_inch18
NSN5310-00-222-7240
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S227-1 · 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 HEIGHT: 0.740 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
•
THREAD CLASS: 3B
•
NOMINAL THREAD SIZE: 0.625 INCHES IN
•
THREAD QUANTITY PER INCH: 18
•
THREAD SERIES: UNF
•
COUNTERSINK ANGLE: 90.0 DEGREES NOMINAL NUT
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
BEARING SURFACE TYPE: WASHER FACED
TECHNICAL CHARACTERISTICS (FLIS)
NUT HEIGHT0.740 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
THREAD CLASS3B
NOMINAL THREAD SIZE0.625 INCHES IN
THREAD QUANTITY PER INCH18
THREAD SERIESUNF
COUNTERSINK ANGLE90.0 DEGREES NOMINAL NUT
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
BEARING SURFACE TYPEWASHER FACED
BEARING SURFACE FINISH125.0 MICROINCHES
WIDTH ACROSS FLATS0.931 INCHES MINIMUM AND 0.945 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
699-36Interchangeable
interchangeable cross-reference
interchangeable
9128373Interchangeable
interchangeable cross-reference
interchangeable
345B12610-1Interchangeable
interchangeable cross-reference
interchangeable
5310002227240Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S227-1?
S227-1 is a NUT,PLAIN,HEXAGON.
What parts can replace S227-1?
There are 4 known substitutes for S227-1: 699-36, 9128373, 345B12610-1 and 1 more. Substitute compatibility should be verified for your specific system.
Is S227-1 still available?
S227-1 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: July 2026