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PHCR-54 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

PHCR-54: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: CASTELLATED HEXAGON, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.281 INCHES NOMINAL IN, hardness_rating: 46.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-305-1458, 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
PHCR-54
NSN: 5310-01-305-1458
NIINs: 013051458, 013655763
FSC: 5310 — Nuts and Washers
CAGE: 89305 — SIMMONDS PRECISION PRODUCTS INC (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
nut_styleCASTELLATED HEXAGON
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_height0.281 INCHES NOMINAL IN
hardness_rating46.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.025 INCHES NOMINAL IN
precious_materialSILVER
surface_treatmentSILVER OVERALL
width_across_flats0.306 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
NSN5310-01-305-1458
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: PHCR-54 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
SUBSTITUTES & CROSS-REFERENCES 2
5310PL0190964Reference document
Same NSN cross-reference
Reference document — Informative reference only
10122185Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is PHCR-54?
PHCR-54 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace PHCR-54?
There are 2 known substitutes for PHCR-54: 5310PL0190964, 10122185. Substitute compatibility should be verified for your specific system.
What is the NSN for PHCR-54?
PHCR-54 is cataloged in the U.S. Government catalog under NSN 5310-01-305-1458. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.