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54998 ✓ Verified by PartsTable
Hama · 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 DIAPHRAGM,VALVE,FLAT is a Hama industrial component. Key specifications include material: STEEL CORROSION RESISTING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-767-3795, 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
54998
NSN: 5315-00-767-3795
FSC: 5315
CAGE: 82423 — KLEINSCHMIDT INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
NSN5315-00-767-3795
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 54998 · Hama ⚠ 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
•
HOLE ARRANGEMENT STYLE: DRILLED THRU CENTER
•
SURFACE TREATMENT: OXIDE OVERALL
•
MATERIAL: STEEL OVERALL
•
FIRST HOLE DIAMETER: 0.062 INCHES NOMINAL IN
•
FIRST END STYLE: SQUARE
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
PIN OVERALL DIAMETER: 0.1870 INCHES NOMINAL IN
•
PIN OVERALL LENGTH: 1.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOLE ARRANGEMENT STYLEDRILLED THRU CENTER
SURFACE TREATMENTOXIDE OVERALL
MATERIALSTEEL OVERALL
FIRST HOLE DIAMETER0.062 INCHES NOMINAL IN
FIRST END STYLESQUARE
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
PIN OVERALL DIAMETER0.1870 INCHES NOMINAL IN
PIN OVERALL LENGTH1.250 INCHES NOMINAL IN
SPECIAL FEATURESONE END CUT 45 DEGREE ANGLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
55062Interchangeable
interchangeable cross-reference
interchangeable
A55062Interchangeable
interchangeable cross-reference
interchangeable
54998Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 54998?
54998 is a DIAPHRAGM,VALVE,FLAT manufactured by Hama.
What parts can replace 54998?
There are 3 known substitutes for 54998: 55062, A55062, 54998. Substitute compatibility should be verified for your specific system.
What is the NSN for 54998?
54998 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-767-3795. 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