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6171126 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6171126: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, thread_class: 2B, thread_series: UNF, overall_height: 2.500 INCHES NOMINAL IN, locking_feature: FREE-RUNNING ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-617-1126, 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
6171126
NSN: 5310-00-617-1126
FSC: 5310 — Nuts and Washers
CAGE: 19204 — ARMY, UNITED STATES DEPARTMENT OF THE DBA ROCK ISLAND ARSENAL JMTC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
thread_class2B
thread_seriesUNF
overall_height2.500 INCHES NOMINAL IN
locking_featureFREE-RUNNING ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness1.000 INCHES NOMINAL IN
surface_treatmentPHOSPHATE OVERALL
width_across_flats3.000 INCHES NOMINAL IN
nominal_thread_size1.250 INCHES IN
washer_outside_diameter3.500 INCHES NOMINAL IN
NSN5310-00-617-1126
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6171126 · 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: 3.500 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 3.000 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
WASHER THICKNESS: 1.000 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.250 INCHES IN
•
LOCKING FEATURE: FREE-RUNNING ALL METAL DESIGN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT2.500 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER3.500 INCHES NOMINAL IN
WIDTH ACROSS FLATS3.000 INCHES NOMINAL IN
THREAD SERIESUNF
WASHER THICKNESS1.000 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.250 INCHES IN
LOCKING FEATUREFREE-RUNNING ALL METAL DESIGN
SURFACE TREATMENTPHOSPHATE OVERALL
NUT STYLEHEXAGON
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

No substitute or cross-reference records for this part.

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 6171126?
6171126 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What is the NSN for 6171126?
6171126 is cataloged in the U.S. Government catalog under NSN 5310-00-617-1126. 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.