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531B — 531B

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

531B: 531B.

The 531B is a the manufacturer industrial component. Key specifications include end_item_identification: NTCSS SNAP III SUBMARINE MISCELLANEOUS PARTS, part_name_assigned_by_controlling_agency: INAVY: MONITOR,COLOR 15". This part is cataloged in the U.S.

Government catalog under NSN 5310-01-412-8595, 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
MRO→ MRO_GENERAL→ 531B
NSN: 5310-01-412-8595
NIINs: 014128595, 015595498
FSC: 5310 — Nuts and Washers
CAGE: 85969 — FABCO FASTENING SYSTEMS TOWNSEND DIV DIV OF TEXTRON INC (USA)
SPECIFICATIONS
end_item_identificationNTCSS SNAP III SUBMARINE MISCELLANEOUS PARTS
part_name_assigned_by_controlling_agencyINAVY: MONITOR,COLOR 15"
NSN5310-01-412-8595
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 531B · 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
•
STYLE DESIGNATOR: CONCAVE
•
OUTSIDE DIAMETER: 0.620 INCHES NOMINAL0.620 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 304 BODY
•
HOLE DIAMETER: 0.264 INCHES NOMINAL0.264 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.096 INCHES MINIMUM AND 0.096 INCHES MINIMUM AND 0.118 INCHES MAXIMUM0.118 INCHES MAXIMUM IN
STYLE DESIGNATORCONCAVE
OUTSIDE DIAMETER0.620 INCHES NOMINAL0.620 INCHES NOMINAL IN
MATERIALSTEEL COMP 304 BODY
MATERIALPLASTIC EPOXY SEALING ELEMENT
HOLE DIAMETER0.264 INCHES NOMINAL0.264 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
4700223Reference document
Same NSN cross-reference
Reference document — Secondary reference
47500223Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 531B?
531B is a 531B. It is classified as a MRO (MRO_GENERAL).
What parts can replace 531B?
There are 2 known substitutes for 531B: 4700223, 47500223. Substitute compatibility should be verified for your specific system.
What is the NSN for 531B?
531B is cataloged in the U.S. Government catalog under NSN 5310-01-412-8595. 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.