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1004131 PIECE 39 — PIN,SYNCHRONIZING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1004131 PIECE 39: PIN,SYNCHRONIZING.

The PIN,SYNCHRONIZING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5315-01-211-8526, 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
1004131 PIECE 39
NSN: 5315-01-211-8526
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 51228 — ECOLAIRE INC BALDWIN-HAMILTON CO DIV (USA)
SPECIFICATIONS
Part Number1004131 PIECE 39
NSN5315-01-211-8526
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1004131 PIECE 39 · 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
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: NITRALLOY-135,MIL-S-869B,CL D,OVERALL;6.2189 IN. LG OVERALL;CASE HARDEN R15N 92-95;STEPPED DIAMETERS 2.125 IN.,1.872 IN. 0.872IN. AND 1.5007 IN.;THREADED HOLES 0.5156 IN.DIA FIRST END AND 0.2031 IN. DIA SECOND END,SECOND END 0.250-20 UNC 2B IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONNITRALLOY-135,MIL-S-869B,CL D,OVERALL;6.2189 IN. LG OVERALL;CASE HARDEN R15N 92-95;STEPPED DIAMETERS 2.125 IN.,1.872 IN. 0.872IN. AND 1.5007 IN.;THREADED HOLES 0.5156 IN.DIA FIRST END AND 0.2031 IN. DIA SECOND END,SECOND END 0.250-20 UNC 2B IN
SUBSTITUTES & CROSS-REFERENCES 2
1004463-1Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1004131Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1004131 PIECE 39?
1004131 PIECE 39 is a PIN,SYNCHRONIZING.
What parts can replace 1004131 PIECE 39?
There are 2 known substitutes for 1004131 PIECE 39: 1004463-1, 1004131. Substitute compatibility should be verified for your specific system.
What is the NSN for 1004131 PIECE 39?
1004131 PIECE 39 is cataloged in the U.S. Government catalog under NSN 5315-01-211-8526. 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.