PartsTable
Technical Data Sheet
8738088-1 ✓ 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

NUT,PLAIN,SINGLE BALL SEAT,HEXAG. Key specifications include material: STEEL OVERALL, nut_style: SINGLE BALL SEAT, HEXAGON, nut_height: 0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN, thread_series: UNIFIED NATIONAL JOINT (UNJ), ball_seat_radius: 0.875 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-078-7025, 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
8738088-1
NSN: 5310-00-078-7025
FSC: 5310
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSINGLE BALL SEAT, HEXAGON
nut_height0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
thread_seriesUNIFIED NATIONAL JOINT (UNJ)
ball_seat_radius0.875 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OR ZINC OVERALL
width_across_flats1.475 INCHES MINIMUM AND 1.495 INCHES MAXIMUM IN
nominal_thread_size1.125 INCHES IN
thread_pitch_diameters+1.0829 TO 1.0899 INCHES IN
end_item_identificationW/S:TRAILER, SEMI (M172A1)
thread_quantity_per_inch16
NSN5310-00-078-7025
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8738088-1 · 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
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
THREAD SERIES: UNIFIED NATIONAL JOINT (UNJ)
THREAD QUANTITY PER INCH: 16
NOMINAL THREAD SIZE: 1.125 INCHES IN
THREAD DIRECTION: RIGHT-HAND
NUT HEIGHT: 0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
WIDTH ACROSS FLATS: 1.475 INCHES MINIMUM AND 1.495 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
THREAD SERIESUNIFIED NATIONAL JOINT (UNJ)
THREAD QUANTITY PER INCH16
NOMINAL THREAD SIZE1.125 INCHES IN
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONW/S:TRAILER, SEMI (M172A1)
WIDTH ACROSS FLATS1.475 INCHES MINIMUM AND 1.495 INCHES MAXIMUM IN
NUT STYLESINGLE BALL SEAT, HEXAGON
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
TI 1/2 FCInterchangeable
interchangeable cross-reference
interchangeable
RCD 1/2 FWInterchangeable
interchangeable cross-reference
interchangeable
5001-2FCInterchangeable
interchangeable cross-reference
interchangeable
89327Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8738088-1?
8738088-1 is a NUT,PLAIN,SINGLE BALL SEAT,HEXAG.
What parts can replace 8738088-1?
There are 4 known substitutes for 8738088-1: TI 1/2 FC, RCD 1/2 FW, 5001-2FC and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8738088-1?
8738088-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-078-7025. This indicates validated use in U.S. government and defense supply chains.
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