42 FLW-1612 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

42 FLW-1612: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL COMP 8630 OR STEEL COMP 4037 OR STEEL COMP 8740 OVERALL, nut_style: DOUBLE HEXAGON, lubrication: SOLUBLE LUBRICANT, temp_rating: 450.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the U.S.

Government catalog under NSN 5310-01-172-2575, 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

42 FLW-1612

NSN: 5310-01-172-2575
FSC: 5310 — Nuts and Washers
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)

SPECIFICATIONS

material	STEEL COMP 8630 OR STEEL COMP 4037 OR STEEL COMP 8740 OVERALL
nut_style	DOUBLE HEXAGON
lubrication	SOLUBLE LUBRICANT
temp_rating	450.0 FAHRENHEIT MAXIMUM DEGF
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
overall_height	1.000 INCHES MAXIMUM IN
hardness_rating	34.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
washer_thickness	0.122 INCHES MINIMUM IN
surface_treatment	CADMIUM OVERALL
NSN	5310-01-172-2575

COMPONENT DIAGRAM

KEY FEATURES

•

LUBRICATION: SOLUBLE LUBRICANT

•

WASHER OUTSIDE DIAMETER: 1.625 INCHES MAXIMUM IN

•

WIDTH ACROSS FLATS: 1.178 INCHES MINIMUM AND 1.190 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

TEMP RATING: 450.0 FAHRENHEIT MAXIMUM DEGF

•

HARDNESS RATING: 34.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM

TECHNICAL CHARACTERISTICS

LUBRICATION	SOLUBLE LUBRICANT
OVERALL HEIGHT	1.000 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER	1.625 INCHES MAXIMUM IN
WIDTH ACROSS FLATS	1.178 INCHES MINIMUM AND 1.190 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
TEMP RATING	450.0 FAHRENHEIT MAXIMUM DEGF
HARDNESS RATING	34.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
WASHER THICKNESS	0.122 INCHES MINIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 6280 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6300 ASSN STD 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 3RD MATERIAL RESPONSE OVERALL

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

BH00450-1612Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

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 42 FLW-1612?

42 FLW-1612 is a NUT,SELF-LOCKING,EXTENDED WASHER.

What parts can replace 42 FLW-1612?

There is 1 known substitute for 42 FLW-1612: BH00450-1612. Substitute compatibility should be verified for your specific system.

What is the NSN for 42 FLW-1612?

42 FLW-1612 is cataloged in the U.S. Government catalog under NSN 5310-01-172-2575. This indicates validated use in U.S. government and defense supply chains.

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