BH1291C-5MFA — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

BH1291C-5MFA: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: HEXAGON, lubrication: DRY FILM LUBRICANT, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.266 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-330-2345, 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

BH1291C-5MFA

NSN: 5310-01-330-2345
FSC: 5310 — Nuts and Washers
CAGE: 27238 — BRISTOL INDUSTRIES, LLC (USA)

SPECIFICATIONS

material	IRON ALLOY 660 OVERALL
nut_style	HEXAGON
lubrication	DRY FILM LUBRICANT
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
overall_height	0.266 INCHES MAXIMUM IN
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
washer_thickness	0.023 INCHES NOMINAL IN
surface_treatment	PASSIVATE OVERALL
width_across_flats	0.367 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
nominal_thread_size	0.312 INCHES IN
NSN	5310-01-330-2345

COMPONENT DIAGRAM

KEY FEATURES

•

LUBRICATION: DRY FILM LUBRICANT

•

WASHER OUTSIDE DIAMETER: 0.520 INCHES MAXIMUM IN

•

WIDTH ACROSS FLATS: 0.367 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

WASHER THICKNESS: 0.023 INCHES NOMINAL IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

TECHNICAL CHARACTERISTICS

LUBRICATION	DRY FILM LUBRICANT
OVERALL HEIGHT	0.266 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER	0.520 INCHES MAXIMUM IN
WIDTH ACROSS FLATS	0.367 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
WASHER THICKNESS	0.023 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.312 INCHES IN

SUBSTITUTES & CROSS-REFERENCES 8

BACN10YR5CMSame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

VN324DH054Reference document

Same NSN cross-reference

Reference document — Secondary reference

PLH55CMSame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

03A153-5LReference document

Same NSN cross-reference

Reference document — Secondary reference

NRH30C-5MSame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

83963-5LSame 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 BH1291C-5MFA?

BH1291C-5MFA is a NUT,SELF-LOCKING,EXTENDED WASHER.

What parts can replace BH1291C-5MFA?

There are 8 known substitutes for BH1291C-5MFA: BACN10YR5CM, VN324DH054, PLH55CM and 5 more. Substitute compatibility should be verified for your specific system.

What is the NSN for BH1291C-5MFA?

BH1291C-5MFA is cataloged in the U.S. Government catalog under NSN 5310-01-330-2345. This indicates validated use in U.S. government and defense supply chains.

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