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MS51923-186 — PIN,SPRING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MS51923-186: PIN,SPRING.

The PIN,SPRING is a the manufacturer industrial component. Key specifications include diameter: 0.047 INCHES NOMINAL IN, material: STEEL COMP 410 OR STEEL COMP 414 OR STEEL COMP 420 OVERALL, overall_length: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, hardness_rating: 46.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM OVERALL, style_designator: COILED, expanded_diameter: 0.049 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-584-6532, 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
MS51923-186
NSN: 5315-00-584-6532
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
diameter0.047 INCHES NOMINAL IN
materialSTEEL COMP 410 OR STEEL COMP 414 OR STEEL COMP 420 OVERALL
overall_length0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
hardness_rating46.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM OVERALL
style_designatorCOILED
expanded_diameter0.049 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5315-00-584-6532
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS51923-186 · 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
KEY FEATURES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EXPANDED DIAMETER: 0.049 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
•
HARDNESS RATING: 46.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM OVERALL
•
STYLE DESIGNATOR: COILED
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
DIAMETER: 0.047 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EXPANDED DIAMETER0.049 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
HARDNESS RATING46.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM OVERALL
STYLE DESIGNATORCOILED
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
DIAMETER0.047 INCHES NOMINAL IN
OVERALL LENGTH0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 410 OR STEEL COMP 414 OR STEEL COMP 420 OVERALL
SUBSTITUTES & CROSS-REFERENCES 6
NAS1407C3M4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
57589Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
512907-001Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
047-0250MCPSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
512907Reference document
Same NSN cross-reference
Reference document — Secondary reference
PF60026-108Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS51923-186?
MS51923-186 is a PIN,SPRING.
What parts can replace MS51923-186?
There are 6 known substitutes for MS51923-186: NAS1407C3M4, 57589, 512907-001 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51923-186?
MS51923-186 is cataloged in the U.S. Government catalog under NSN 5315-00-584-6532. 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.