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STSPB803W16 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

STSPB803W16: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, nut_style: HEXAGON, nut_height: 0.304 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT (UNJ), special_features: ONE HOLE DRILLED FOR LOCKING DEVICE. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-181-6493, 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
STSPB803W16
NSN: 5310-00-181-6493
FSC: 5310 — Nuts and Washers
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
nut_styleHEXAGON
nut_height0.304 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT (UNJ)
special_featuresONE HOLE DRILLED FOR LOCKING DEVICE
thread_directionRIGHT-HAND
countersink_angle120.0 DEGREES NOMINAL NUT
surface_treatmentANODIZE OVERALL
width_across_flats1.609 INCHES MINIMUM AND 1.641 INCHES MAXIMUM IN
nominal_thread_size1.312 INCHES IN
bearing_surface_typeFLAT
NSN5310-00-181-6493
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: STSPB803W16 · 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
•
WIDTH ACROSS FLATS: 1.609 INCHES MINIMUM AND 1.641 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT (UNJ)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.312 INCHES IN
•
NUT HEIGHT: 0.304 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
COUNTERSINK ANGLE: 120.0 DEGREES NOMINAL NUT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.609 INCHES MINIMUM AND 1.641 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL JOINT (UNJ)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.312 INCHES IN
NUT HEIGHT0.304 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
SPECIAL FEATURESONE HOLE DRILLED FOR LOCKING DEVICE
SURFACE TREATMENTANODIZE OVERALL
COUNTERSINK ANGLE120.0 DEGREES NOMINAL NUT
NUT STYLEHEXAGON
THREAD CLASS3B
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 1
2-03014W16Reference document
Same NSN cross-reference
Reference document — Design control — primary 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 STSPB803W16?
STSPB803W16 is a NUT,PLAIN,HEXAGON.
What parts can replace STSPB803W16?
There is 1 known substitute for STSPB803W16: 2-03014W16. Substitute compatibility should be verified for your specific system.
What is the NSN for STSPB803W16?
STSPB803W16 is cataloged in the U.S. Government catalog under NSN 5310-00-181-6493. 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.