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0921173 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

0921173: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include head_style: WATERTIGHT, head_height: 0.089 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.296 INCHES NOMINAL IN, thread_length: 0.375 INCHES MINIMUM IN, screw_material: STEEL CORROSION RESISTING. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-235-8642, 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
0921173
NSN: 5310-00-235-8642
NIINs: 002358642, 008558279
FSC: 5310 — Nuts and Washers
CAGE: 13446 — PERKINS ENGINES INC (USA)
SPECIFICATIONS
head_styleWATERTIGHT
head_height0.089 INCHES NOMINAL IN
thread_class2A A
head_diameter0.296 INCHES NOMINAL IN
thread_length0.375 INCHES MINIMUM IN
screw_materialSTEEL CORROSION RESISTING
fastener_length0.375 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.138 INCHES IN
screw_surface_treatmentPASSIVATE
thread_quantity_per_inch32
NSN5310-00-235-8642
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 0921173 · 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
•
OVERALL DIAMETER: 0.818 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: COPPER ALLOY OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.393 INCHES NOMINAL IN
•
THICKNESS: 0.081 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.818 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALCOPPER ALLOY OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.393 INCHES NOMINAL IN
THICKNESS0.081 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 4
1PE122Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
337873Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
39660Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
35A2A219Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 0921173?
0921173 is a WASHER,FLAT.
What parts can replace 0921173?
There are 4 known substitutes for 0921173: 1PE122, 337873, 39660 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 0921173?
0921173 is cataloged in the U.S. Government catalog under NSN 5310-00-235-8642. 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.