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PartsTable / COMPONENT / 3WB177
3WB177 ✓ 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,CAP is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: CAPCAP, thread_class: 2B2B, thread_series: UNFUNF, thread_direction: RIGHT-HANDRIGHT-HAND, nominal_thread_size: 0.250 INCHES0.250 INCHES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-135-6072, 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
3WB177
NSN: 5310-01-135-6072
FSC: 5310
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleCAPCAP
thread_class2B2B
thread_seriesUNFUNF
thread_directionRIGHT-HANDRIGHT-HAND
nominal_thread_size0.250 INCHES0.250 INCHES IN
thread_quantity_per_inch2828
NSN5310-01-135-6072
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3WB177 · 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 DIRECTION: RIGHT-HANDRIGHT-HAND
•
NUT STYLE: CAPCAP
•
NOMINAL THREAD SIZE: 0.250 INCHES0.250 INCHES IN
•
THREAD CLASS: 2B2B
•
THREAD QUANTITY PER INCH: 2828
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
THREAD SERIES: UNFUNF
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HANDRIGHT-HAND
NUT STYLECAPCAP
NOMINAL THREAD SIZE0.250 INCHES0.250 INCHES IN
THREAD CLASS2B2B
THREAD QUANTITY PER INCH2828
MATERIALSTEEL CORROSION RESISTING OVERALL
THREAD SERIESUNFUNF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
21633Interchangeable
interchangeable cross-reference
interchangeable
114618Interchangeable
interchangeable cross-reference
interchangeable
BEAX4GInterchangeable
interchangeable cross-reference
interchangeable
MIL-T-21309 TY4CL2Interchangeable
interchangeable cross-reference
interchangeable
A-A-59158Interchangeable
interchangeable cross-reference
interchangeable
AS59158 TY4CL2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3WB177?
3WB177 is a NUT,PLAIN,CAP.
What parts can replace 3WB177?
There are 12 known substitutes for 3WB177: 21633, 114618, BEAX4G and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3WB177?
3WB177 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-135-6072. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026