PartsTable
Technical Data Sheet
S-278 ✓ 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 TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1118 OVERALL, nut_style: SLOTTED, HEXAGON, body_width: 1.875 INCHES NOMINAL IN, flow_angle: 90.0 DEGREES FIRST END, nut_height: 0.500 INCHES NOMINAL IN, seat_angle: 37.0 DEGREES FIRST END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-264-0275, 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
S-278
NSN: 5310-00-264-0275
FSC: 5310
CAGE: 15434 — CUMMINS INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 1118 OVERALL
nut_styleSLOTTED, HEXAGON
body_width1.875 INCHES NOMINAL IN
flow_angle90.0 DEGREES FIRST END
nut_height0.500 INCHES NOMINAL IN
seat_angle37.0 DEGREES FIRST END
body_height2.500 INCHES NOMINAL IN
body_length2.063 INCHES NOMINAL IN
temp_rating-65.0 FAHRENHEIT AND 300.0 FAHRENHEIT SINGLE RESPONSE DEGF
flange_styleROUND W/ OUT BOLT HOLES SECOND END
thread_class3B FIRST END
thread_seriesUNF
NSN5310-00-264-0275
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S-278 · 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
THREAD QUANTITY PER INCH: 16
NOMINAL THREAD SIZE: 0.750 INCHES IN
THREAD SERIES: UNF
BEARING SURFACE TYPE: FLAT
THREAD DIRECTION: RIGHT-HAND
THREAD CLASS: 2B
MATERIAL: STEEL COMP 1118 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH16
NOMINAL THREAD SIZE0.750 INCHES IN
THREAD SERIESUNF
BEARING SURFACE TYPEFLAT
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2B
MATERIALSTEEL COMP 1118 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NUT STYLESLOTTED, HEXAGON
WIDTH ACROSS FLATS1.062 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
10063-0Interchangeable
interchangeable cross-reference
interchangeable
101060Interchangeable
interchangeable cross-reference
interchangeable
S278Interchangeable
interchangeable cross-reference
interchangeable
106C2973P2Interchangeable
interchangeable cross-reference
interchangeable
94479-65Interchangeable
interchangeable cross-reference
interchangeable
R23248-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S-278?
S-278 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace S-278?
There are 10 known substitutes for S-278: 10063-0, 101060, S278 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S-278?
S-278 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-264-0275. This indicates validated use in U.S. government and defense supply chains.
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