PartsTable
Technical Data Sheet
61255-7-75 ✓ 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,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1005 OVERALL, nut_style: ROUND, nut_diameter: 5.1875 INCHES NOMINAL IN, nut_thickness: 0.750 INCHES NOMINAL IN, thread_series: UNS, hardness_rating: 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-185-6375, 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
61255-7-75
NSN: 5310-00-185-6375
FSC: 5310
CAGE: 65177 — PATTERSON PUMP CO DIV PATTERSON PUMP COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 1005 OVERALL
nut_styleROUND
nut_diameter5.1875 INCHES NOMINAL IN
nut_thickness0.750 INCHES NOMINAL IN
thread_seriesUNS
hardness_rating66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
thread_directionRIGHT-HAND
drive_point_depth0.1563 INCHES NOMINAL IN
drive_point_width0.375 INCHES NOMINAL IN
nominal_thread_size3.918 INCHES IN
drive_point_quantity4
thread_pitch_diameters+3.8639 TO 3.8713 INCHES IN
NSN5310-00-185-6375
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 61255-7-75 · 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 PITCH DIAMETERS: +3.8639 TO 3.8713 INCHES IN
HARDNESS RATING: 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
THREAD QUANTITY PER INCH: 12
THREAD SERIES: UNS
NOMINAL THREAD SIZE: 3.918 INCHES IN
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 1 CLASS
THREAD DIRECTION: RIGHT-HAND
NUT DIAMETER: 5.1875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD PITCH DIAMETERS+3.8639 TO 3.8713 INCHES IN
HARDNESS RATING66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
THREAD QUANTITY PER INCH12
THREAD SERIESUNS
NOMINAL THREAD SIZE3.918 INCHES IN
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 1 CLASS
THREAD DIRECTIONRIGHT-HAND
NUT DIAMETER5.1875 INCHES NOMINAL IN
DRIVE POINT QUANTITY4
DRIVE POINT WIDTH0.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
38246Z10Interchangeable
interchangeable cross-reference
interchangeable
NP2T2Interchangeable
interchangeable cross-reference
interchangeable
HH-I-435Interchangeable
interchangeable cross-reference
interchangeable
M3786-8-137Interchangeable
interchangeable cross-reference
interchangeable
3824-6Interchangeable
interchangeable cross-reference
interchangeable
MS35923-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 61255-7-75?
61255-7-75 is a NUT,PLAIN,ROUND.
What parts can replace 61255-7-75?
There are 21 known substitutes for 61255-7-75: 38246Z10, NP2T2, HH-I-435 and 18 more. Substitute compatibility should be verified for your specific system.
Is 61255-7-75 still available?
61255-7-75 is currently cancelled.
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