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31TA56 ✓ 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 PIN,STRAIGHT,HEADED is a the manufacturer industrial component. Key specifications include height: 0.125 INCHES NOMINAL IN, diameter: 0.375 INCHES NOMINAL IN, material: STEEL OVERALL, head_style: FLAT, chamfer_length: 0.078 INCHES NOMINAL IN, style_designator: STRAIGHT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-276-4346, 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
31TA56
NSN: 5315-00-276-4346
FSC: 5315
CAGE: 45152 — OSHKOSH CORP (USA)
SPECIFICATIONS
height0.125 INCHES NOMINAL IN
diameter0.375 INCHES NOMINAL IN
materialSTEEL OVERALL
head_styleFLAT
chamfer_length0.078 INCHES NOMINAL IN
style_designatorSTRAIGHT
pin_chamfer_angle15.0 DEGREES NOMINAL
pin_head_diameter0.500 INCHES NOMINAL IN
under_head_length1.094 INCHES NOMINAL IN
first_hole_diameter0.106 INCHES NOMINAL IN
hole_arrangement_styleONE END DRILLED
material_document_and_classificationQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5315-00-276-4346
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 31TA56 · 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
•
PIN CHAMFER ANGLE: 15.0 DEGREES NOMINAL
•
HEIGHT: 0.125 INCHES NOMINAL IN
•
CHAMFER LENGTH: 0.078 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
DIAMETER: 0.375 INCHES NOMINAL IN
•
UNDER HEAD LENGTH: 1.094 INCHES NOMINAL IN
•
FIRST HOLE DIAMETER: 0.106 INCHES NOMINAL IN
•
HOLE ARRANGEMENT STYLE: ONE END DRILLED
TECHNICAL CHARACTERISTICS (FLIS)
PIN CHAMFER ANGLE15.0 DEGREES NOMINAL
HEIGHT0.125 INCHES NOMINAL IN
CHAMFER LENGTH0.078 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
DIAMETER0.375 INCHES NOMINAL IN
UNDER HEAD LENGTH1.094 INCHES NOMINAL IN
FIRST HOLE DIAMETER0.106 INCHES NOMINAL IN
HOLE ARRANGEMENT STYLEONE END DRILLED
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN0.156 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
11-4785Interchangeable
interchangeable cross-reference
interchangeable
2708 1-2 4AInterchangeable
interchangeable cross-reference
interchangeable
EE-49756Interchangeable
interchangeable cross-reference
interchangeable
116488Interchangeable
interchangeable cross-reference
interchangeable
J512Interchangeable
interchangeable cross-reference
interchangeable
SAE J512 10 010111BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31TA56?
31TA56 is a PIN,STRAIGHT,HEADED.
What parts can replace 31TA56?
There are 27 known substitutes for 31TA56: 11-4785, 2708 1-2 4A, EE-49756 and 24 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 31TA56?
31TA56 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-276-4346. 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