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PartsTable / COMPONENT / 56-255AP
56-255AP ✓ 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 KEY,WOODRUFF is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1095 OVERALL, material_document_and_classification: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-199-3476, 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
56-255AP
NSN: 5315-01-199-3476
FSC: 5315
CAGE: 1T943 — ACME PRODUCTS & ENGINEERING INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1095 OVERALL
material_document_and_classificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5315-01-199-3476
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 56-255AP · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 1095 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 1095 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
5625Interchangeable
IBM Fiber Cable LC/LC 25m multimode
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5625-5Interchangeable
interchangeable cross-reference
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639025-1Interchangeable
interchangeable cross-reference
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101828Interchangeable
interchangeable cross-reference
interchangeable
U1828Interchangeable
interchangeable cross-reference
interchangeable
60-686 PIECE 255Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 56-255AP?
56-255AP is a KEY,WOODRUFF.
What parts can replace 56-255AP?
There are 6 known substitutes for 56-255AP: 5625, 5625-5, 639025-1 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 56-255AP?
56-255AP is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-199-3476. 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