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Technical Data Sheet
10121790 ✓ 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 WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OVERALL, thickness: 0.065 INCHES NOMINAL IN, hole_diameter: 0.312 INCHES NOMINAL IN, overall_diameter: 0.750 INCHES NOMINAL IN, surface_treatment: PASSIVATE OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-880-5977, 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
10121790
NSN: 5310-00-880-5977
FSC: 5310
CAGE: A486G — NIMIKKEISTOKESKUS NCB FINLAND (FIN)
SPECIFICATIONS
materialSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OVERALL
thickness0.065 INCHES NOMINAL IN
hole_diameter0.312 INCHES NOMINAL IN
overall_diameter0.750 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
nondefinitive_spec/std_dataA TYPE AND 1 GRADE AND B CLASS
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
NSN5310-00-880-5977
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 10121790 · 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
CENTER HOLE SHAPE STYLE: ROUND
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
SURFACE TREATMENT: PASSIVATE OVERALL
NONDEFINITIVE SPEC/STD DATA: A TYPE AND 1 GRADE AND B CLASS
OVERALL DIAMETER: 0.750 INCHES NOMINAL IN
HOLE DIAMETER: 0.312 INCHES NOMINAL IN
THICKNESS: 0.065 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE SHAPE STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
END ITEM IDENTIFICATIONMRAP BUFFALO MK2A2; MRAP - COUGAR CAT1 A1; MRAP - COUGAR CAT1 A2; ARMORED MULTI-PURPOSE VEHICLE (AMPV); MULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE; LOGISTICS SUPPORT VESSEL
SURFACE TREATMENTPASSIVATE OVERALL
NONDEFINITIVE SPEC/STD DATAA TYPE AND 1 GRADE AND B CLASS
OVERALL DIAMETER0.750 INCHES NOMINAL IN
HOLE DIAMETER0.312 INCHES NOMINAL IN
THICKNESS0.065 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
8979Interchangeable
interchangeable cross-reference
interchangeable
1326325Interchangeable
interchangeable cross-reference
interchangeable
637440Interchangeable
interchangeable cross-reference
interchangeable
6145PL1732769Interchangeable
interchangeable cross-reference
interchangeable
C1 5Y(E)AWG26/7WHInterchangeable
interchangeable cross-reference
interchangeable
MPD1506E26U9Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 10121790?
10121790 is a WASHER,FLAT.
What parts can replace 10121790?
There are 28 known substitutes for 10121790: 8979, 1326325, 637440 and 25 more. Substitute compatibility should be verified for your specific system.
Is 10121790 still available?
10121790 is currently cancelled.
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