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Technical Data Sheet
PartsTable / COMPONENT / 56494-.031 THK
56494-.031 THK ✓ 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 56494-.031 THK is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-571-9709, 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
56494-.031 THK
NSN: 5310-00-571-9709
FSC: 5310
CAGE: 96046 — CRANE PUMPS & SYSTEMS PFT CORP DIV CRANE PUMPS & SYSTEM PFT CORP. (USA)
SPECIFICATIONS
Part Number56494-.031 THK
NSN5310-00-571-9709
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 56494-.031 THK · 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
•
THICKNESS: 0.031 INCHES NOMINAL IN
•
MATERIAL: NICKEL OR NICKEL ALLOY 400 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B164 ASSN STD ALL MATERIAL RESPONSES OR QQ-N-281 ASSN STD 1ST MATERIAL RESPONSE OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 1.280 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OVERALL DIAMETER: 2.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.031 INCHES NOMINAL IN
MATERIALNICKEL OR NICKEL ALLOY 400 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B164 ASSN STD ALL MATERIAL RESPONSES OR QQ-N-281 ASSN STD 1ST MATERIAL RESPONSE OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER1.280 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OVERALL DIAMETER2.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
B56494Interchangeable
interchangeable cross-reference
interchangeable
293858PC1Interchangeable
interchangeable cross-reference
interchangeable
56494Interchangeable
interchangeable cross-reference
interchangeable
8617628Interchangeable
interchangeable cross-reference
interchangeable
56495-2Interchangeable
interchangeable cross-reference
interchangeable
40334-24Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 56494-.031 THK?
56494-.031 THK is a 56494-.031 THK.
What parts can replace 56494-.031 THK?
There are 12 known substitutes for 56494-.031 THK: B56494, 293858PC1, 56494 and 9 more. Substitute compatibility should be verified for your specific system.
Is 56494-.031 THK still available?
56494-.031 THK is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026