ST3M788-6 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

ST3M788-6: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: SLOTTED HEXAGON, lubrication: DRY FILM LUBRICANT, temp_rating: -450.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the U.S.

Government catalog under NSN 5310-01-134-0751, 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

ST3M788-6

NSN: 5310-01-134-0751
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)

SPECIFICATIONS

material	IRON ALLOY 660 OVERALL
nut_style	SLOTTED HEXAGON
lubrication	DRY FILM LUBRICANT
temp_rating	-450.0 FAHRENHEIT NOMINAL DEGF
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
overall_height	0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
washer_thickness	0.025 INCHES NOMINAL IN
width_across_flats	0.430 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
nominal_thread_size	0.375 INCHES IN
NSN	5310-01-134-0751

COMPONENT DIAGRAM

KEY FEATURES

•

LUBRICATION: DRY FILM LUBRICANT

•

WASHER OUTSIDE DIAMETER: 0.539 INCHES NOMINAL IN

•

WIDTH ACROSS FLATS: 0.430 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

TEMP RATING: -450.0 FAHRENHEIT NOMINAL DEGF

•

WASHER THICKNESS: 0.025 INCHES NOMINAL IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

TECHNICAL CHARACTERISTICS

LUBRICATION	DRY FILM LUBRICANT
OVERALL HEIGHT	0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER	0.539 INCHES NOMINAL IN
WIDTH ACROSS FLATS	0.430 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
TEMP RATING	-450.0 FAHRENHEIT NOMINAL DEGF
WASHER THICKNESS	0.025 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.375 INCHES IN

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 3

E12589-6Reference document

Same NSN cross-reference

Reference document — Secondary reference

BH788-6Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

10109699Reference document

Same NSN cross-reference

Reference document — Informative reference only

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is ST3M788-6?

ST3M788-6 is a NUT,SELF-LOCKING,EXTENDED WASHER.

What parts can replace ST3M788-6?

There are 3 known substitutes for ST3M788-6: E12589-6, BH788-6, 10109699. Substitute compatibility should be verified for your specific system.

What is the NSN for ST3M788-6?

ST3M788-6 is cataloged in the U.S. Government catalog under NSN 5310-01-134-0751. This indicates validated use in U.S. government and defense supply chains.

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