FN1216-624 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

FN1216-624: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: DOUBLE HEXAGON, thread_class: 3B, thread_series: UNF, overall_height: 0.458 INCHES MAXIMUM IN, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-262-6314, 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

FN1216-624

NSN: 5310-01-262-6314
NIINs: 012626314, 012645908, 013136009
FSC: 5310 — Nuts and Washers
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)

SPECIFICATIONS

material	IRON ALLOY 660 OVERALL
nut_style	DOUBLE HEXAGON
thread_class	3B
thread_series	UNF
overall_height	0.458 INCHES MAXIMUM IN
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
washer_thickness	0.058 INCHES MINIMUM IN
precious_material	SILVER
surface_treatment	SILVER OVERALL
width_across_flats	0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
nominal_thread_size	0.375 INCHES IN
NSN	5310-01-262-6314

COMPONENT DIAGRAM

KEY FEATURES

•

WASHER OUTSIDE DIAMETER: 0.598 INCHES MAXIMUM IN

•

WIDTH ACROSS FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN

•

THREAD SERIES: UNF

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.375 INCHES IN

TECHNICAL CHARACTERISTICS

OVERALL HEIGHT	0.458 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER	0.598 INCHES MAXIMUM IN
WIDTH ACROSS FLATS	0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
THREAD SERIES	UNF
MATERIAL DOCUMENT AND CLASSIFICATION	AMS5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.375 INCHES IN
SPECIAL FEATURES	HEAT TREATMENT-SOLUTION TREATED AT 1800 DEG.F PLUS/MINUS 50 DEG FOR 1 TO 4 HRS AND OIL QUENCH OR AIR COOL.AGEHARDEN AT 1300 DEG-1400 DEGF FOR 16 HR.AND AIR COOL;HARDNESS-ESNA RC27-40,KAYNAR RC32-48,SPS RC35-42,VOI-SHAN RC 32-44 DEGF
NUT STYLE	DOUBLE HEXAGON
THREAD CLASS	3B

SUBSTITUTES & CROSS-REFERENCES 9

R398P4HReference document

Same NSN cross-reference

Reference document — Drawing number reference only

R398P4Reference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

R398P4DReference document

Same NSN cross-reference

Reference document — Drawing number reference only

R398P4BReference document

Same NSN cross-reference

Reference document — Drawing number reference only

R398P4FReference document

Same NSN cross-reference

Reference document — Drawing number reference only

LH3417-064Reference document

Same NSN cross-reference

Reference document — Secondary reference

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 FN1216-624?

FN1216-624 is a NUT,SELF-LOCKING,EXTENDED WASHER.

What parts can replace FN1216-624?

There are 9 known substitutes for FN1216-624: R398P4H, R398P4, R398P4D and 6 more. Substitute compatibility should be verified for your specific system.

What is the NSN for FN1216-624?

FN1216-624 is cataloged in the U.S. Government catalog under NSN 5310-01-262-6314. This indicates validated use in U.S. government and defense supply chains.

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FN1216-624 — NUT,SELF-LOCKING,EXTENDED WASHER

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