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ST1325-11 — NUT,PLAIN,EXTENDED WASHER,DOUBLE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

ST1325-11: NUT,PLAIN,EXTENDED WASHER,DOUBLE.

NUT,PLAIN,EXTENDED WASHER,DOUBLE. Key specifications include material: NICKEL OVERALL, nut_style: DOUBLE HEXAGON, thread_series: UNS, overall_height: 0.458 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN, thread_direction: RIGHT-HAND, washer_thickness: 0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-901-7329, 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
ST1325-11
NSN: 5310-00-901-7329
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialNICKEL OVERALL
nut_styleDOUBLE HEXAGON
thread_seriesUNS
overall_height0.458 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
washer_thickness0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
precious_materialSILVER
surface_treatmentSILVER OVERALL
width_across_flats0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
nominal_thread_size0.312 INCHES IN
thread_pitch_diameters+0.2884 TO 0.2920 INCHES IN
washer_outside_diameter0.541 INCHES MAXIMUM IN
NSN5310-00-901-7329
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ST1325-11 · 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: 0.541 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNS
•
PRECIOUS MATERIAL: SILVER
•
THREAD PITCH DIAMETERS: +0.2884 TO 0.2920 INCHES IN
•
WASHER THICKNESS: 0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.458 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER0.541 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNS
PRECIOUS MATERIALSILVER
THREAD PITCH DIAMETERS+0.2884 TO 0.2920 INCHES IN
WASHER THICKNESS0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5709 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
SUBSTITUTES & CROSS-REFERENCES 2
584413Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
584414Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 ST1325-11?
ST1325-11 is a NUT,PLAIN,EXTENDED WASHER,DOUBLE.
What parts can replace ST1325-11?
There are 2 known substitutes for ST1325-11: 584413, 584414. Substitute compatibility should be verified for your specific system.
What is the NSN for ST1325-11?
ST1325-11 is cataloged in the U.S. Government catalog under NSN 5310-00-901-7329. 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.