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608889-10 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

608889-10: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: PLASTIC POLYAMIDE NYLON LOCKING INSERT, nut_style: DOUBLE HEXAGON, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.453 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-297-3756, 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
608889-10
NSN: 5310-00-297-3756
FSC: 5310 — Nuts and Washers
CAGE: 80020 — NAVAL AIR WARFARE CENTER AIRCRAFT DIVISION JOINT BASE JBMDL (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON LOCKING INSERT
nut_styleDOUBLE HEXAGON
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_height0.453 INCHES NOMINAL IN
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
washer_thickness0.099 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL EXCEPT INSERT
width_across_flats0.488 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
nominal_thread_size0.375 INCHES IN
NSN5310-00-297-3756
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 608889-10 · 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
•
WASHER OUTSIDE DIAMETER: 0.677 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.488 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
TEMP RATING: 250.0 FAHRENHEIT NOMINAL DEGF
•
WASHER THICKNESS: 0.099 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD ALL MATERIAL RESPONSES NUT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.453 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER0.677 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.488 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
TEMP RATING250.0 FAHRENHEIT NOMINAL DEGF
WASHER THICKNESS0.099 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD ALL MATERIAL RESPONSES NUT
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
SUBSTITUTES & CROSS-REFERENCES 7
5310PL2016022Reference document
Same NSN cross-reference
Reference document — Informative reference only
607873-15Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
170981Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
12NH-6Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
53-60100-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
EB064Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 608889-10?
608889-10 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace 608889-10?
There are 7 known substitutes for 608889-10: 5310PL2016022, 607873-15, 170981 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 608889-10?
608889-10 is cataloged in the U.S. Government catalog under NSN 5310-00-297-3756. 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.