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121B514H01 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

121B514H01: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include length: 2.000 INCHES NOMINAL IN, material: STEEL OVERALL, thickness: 0.090 INCHES NOMINAL IN, width_across_flats: 1.600 INCHES NOMINAL IN, fsc_application_data: AN/TPS 43E, peripheral_shape_style: RECTANGULAR. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-175-1034, 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
121B514H01
NSN: 5310-01-175-1034
FSC: 5310 — Nuts and Washers
CAGE: 54372 — RIDGE ENGINEERING, LLC. (USA)
SPECIFICATIONS
length2.000 INCHES NOMINAL IN
materialSTEEL OVERALL
thickness0.090 INCHES NOMINAL IN
width_across_flats1.600 INCHES NOMINAL IN
fsc_application_dataAN/TPS 43E
peripheral_shape_styleRECTANGULAR
center_hole_shape_styleROUND W/FLATS
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-766 CL 302 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-175-1034
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 121B514H01 · 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
•
FSC APPLICATION DATA: AN/TPS 43E
•
WIDTH ACROSS FLATS: 1.600 INCHES NOMINAL IN
•
LENGTH: 2.000 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766 CL 302 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: RECTANGULAR
•
MATERIAL: STEEL OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND W/FLATS
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAAN/TPS 43E
WIDTH ACROSS FLATS1.600 INCHES NOMINAL IN
LENGTH2.000 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766 CL 302 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLERECTANGULAR
MATERIALSTEEL OVERALL
CENTER HOLE SHAPE STYLEROUND W/FLATS
THICKNESS0.090 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
335C691H21Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 121B514H01?
121B514H01 is a WASHER,FLAT.
What parts can replace 121B514H01?
There is 1 known substitute for 121B514H01: 335C691H21. Substitute compatibility should be verified for your specific system.
What is the NSN for 121B514H01?
121B514H01 is cataloged in the U.S. Government catalog under NSN 5310-01-175-1034. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.