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PartsTable / COMPONENT / 121800
121800 ✓ 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 WASHER,LOCK is a Hama industrial component. Key specifications include overall_width: 19.000 INCHES NOMINAL IN, overall_height: 5.250 INCHES NOMINAL IN, basic_shape_style: RECTANGULAR OR SQUARE, installation_design: RACK, circuit_construction_type: SOLID STATE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-167-0721, 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
121800
NSN: 5310-00-167-0721
FSC: 5310
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
overall_width19.000 INCHES NOMINAL IN
overall_height5.250 INCHES NOMINAL IN
basic_shape_styleRECTANGULAR OR SQUARE
installation_designRACK
circuit_construction_typeSOLID STATE
NSN5310-00-167-0721
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 121800 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
1218Interchangeable
interchangeable cross-reference
interchangeable
P25Interchangeable
interchangeable cross-reference
interchangeable
11501869Interchangeable
interchangeable cross-reference
interchangeable
125-130P4Interchangeable
interchangeable cross-reference
interchangeable
Q70994-5Interchangeable
interchangeable cross-reference
interchangeable
8825K5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121800?
121800 is a WASHER,LOCK manufactured by Hama.
What parts can replace 121800?
There are 30 known substitutes for 121800: 1218, P25, 11501869 and 27 more. Substitute compatibility should be verified for your specific system.
Is 121800 still available?
121800 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