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Technical Data Sheet
PartsTable / COMPONENT / PB-313
PB-313 ✓ 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: RUBBER SYNTHETIC OVERALL, nut_style: ROUND, nut_diameter: 0.350 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 0.560 INCHES NOMINAL IN, thread_series: UNS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-057-2871, 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
PB-313
NSN: 5310-01-057-2871
FSC: 5310
CAGE: 80531 — C AND D BATTERIES AN ALLIED CO PLANT 1 (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
nut_styleROUND
nut_diameter0.350 INCHES NOMINAL IN
thread_class2B
nut_thickness0.560 INCHES NOMINAL IN
thread_seriesUNS
thread_directionRIGHT-HAND
drive_point_depth0.220 INCHES NOMINAL IN
drive_point_width0.750 INCHES NOMINAL IN
nominal_thread_size2.500 INCHES IN
drive_point_quantity6
thread_quantity_per_inch9
NSN5310-01-057-2871
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: PB-313 · 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 CLASS: 2B
•
NOMINAL THREAD SIZE: 2.500 INCHES IN
•
THREAD QUANTITY PER INCH: 9
•
THREAD SERIES: UNS
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
DRIVE POINT WIDTH: 0.750 INCHES NOMINAL IN
•
NUT STYLE: ROUND
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B
NOMINAL THREAD SIZE2.500 INCHES IN
THREAD QUANTITY PER INCH9
THREAD SERIESUNS
MATERIALRUBBER SYNTHETIC OVERALL
DRIVE POINT WIDTH0.750 INCHES NOMINAL IN
NUT STYLEROUND
THREAD DIRECTIONRIGHT-HAND
NUT THICKNESS0.560 INCHES NOMINAL IN
DRIVE POINT QUANTITY6
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
K4949Interchangeable
interchangeable cross-reference
interchangeable
9T31Y3445Interchangeable
interchangeable cross-reference
interchangeable
567A831-1Interchangeable
interchangeable cross-reference
interchangeable
MS90725-114Interchangeable
interchangeable cross-reference
interchangeable
7SS1-27-3Interchangeable
interchangeable cross-reference
interchangeable
61873Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PB-313?
PB-313 is a NUT,PLAIN,ROUND.
What parts can replace PB-313?
There are 6 known substitutes for PB-313: K4949, 9T31Y3445, 567A831-1 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PB-313?
PB-313 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-057-2871. 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