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Technical Data Sheet
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NAS1291C04M — Technical Data Sheet

✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: HEXAGON, lubrication: DRY FILM LUBRICANT, temp_rating: 550.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the Federal Logistics Information System under NSN 5305-00-054-5650, 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
NAS1291C04M
NSN: 5305-00-054-5650
FSC: 5305
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleHEXAGON
lubricationDRY FILM LUBRICANT
temp_rating550.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_height0.103 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.010 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
width_across_flats0.150 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
NSN5305-00-054-5650
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: NAS1291C04M · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
84914385-11InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
343-0136-00InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
091916InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
23025InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A-A-410InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
3507InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS1291C04M?
NAS1291C04M is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace NAS1291C04M?
There are 27 known substitutes for NAS1291C04M: 84914385-11, 343-0136-00, 091916 and 24 more. Substitute compatibility should be verified for your specific system.
Is NAS1291C04M still available?
NAS1291C04M is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026