PartsTable
Technical Data Sheet
Download PDF

356137 — NUT,PLAIN,EXTENDED WASHER,DOUBLE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

356137: NUT,PLAIN,EXTENDED WASHER,DOUBLE.

NUT,PLAIN,EXTENDED WASHER,DOUBLE. Key specifications include material: STEEL COMP 8740 OVERALL, nut_style: DOUBLE HEXAGON, thread_class: 3B, thread_series: UNF, overall_height: 0.375 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-660-3044, 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
356137
NSN: 5310-00-660-3044
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OVERALL
nut_styleDOUBLE HEXAGON
thread_class3B
thread_seriesUNF
overall_height0.375 INCHES NOMINAL IN
thread_directionRIGHT-HAND
washer_thickness0.070 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
width_across_flats0.4345 INCHES NOMINAL IN
nominal_thread_size0.312 INCHES IN
washer_outside_diameter0.491 INCHES NOMINAL IN
thread_quantity_per_inch24
NSN5310-00-660-3044
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 356137 · 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: 0.491 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.4345 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
WASHER THICKNESS: 0.070 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.375 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER0.491 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.4345 INCHES NOMINAL IN
THREAD SERIESUNF
WASHER THICKNESS0.070 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.312 INCHES IN
SURFACE TREATMENTCADMIUM OVERALL
NUT STYLEDOUBLE HEXAGON
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
Ready to buy 356137?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 356137?
356137 is a NUT,PLAIN,EXTENDED WASHER,DOUBLE.
What is the NSN for 356137?
356137 is cataloged in the U.S. Government catalog under NSN 5310-00-660-3044. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 356137

✓ 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.