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1229N-375 — WASHER,SHOULDERED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1229N-375: WASHER,SHOULDERED.

The WASHER,SHOULDERED is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON OVERALL, hole_diameter: 0.130 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN, shoulder_height: 0.031 INCHES NOMINAL IN, outside_diameter: 0.375 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN, style_designator: SHOULDERED, shoulder_diameter: 0.177 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-151-2778, 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
1229N-375
NSN: 5310-01-151-2778
FSC: 5310 — Nuts and Washers
CAGE: 06540 — NEW HAVEN MFG CORP AMATOM ELECTRONIC HARDWARE DIV (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON OVERALL
hole_diameter0.130 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
shoulder_height0.031 INCHES NOMINAL IN
outside_diameter0.375 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
style_designatorSHOULDERED
shoulder_diameter0.177 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
material_thickness0.032 INCHES NOMINAL IN
material_document_and_classificationASTM D4066 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-151-2778
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1229N-375 · 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
•
SHOULDER HEIGHT: 0.031 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM D4066 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.375 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.032 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 0.177 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
•
MATERIAL: PLASTIC POLYAMIDE NYLON OVERALL
•
HOLE DIAMETER: 0.130 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SHOULDER HEIGHT0.031 INCHES NOMINAL IN
STYLE DESIGNATORSHOULDERED
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D4066 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.375 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
MATERIAL THICKNESS0.032 INCHES NOMINAL IN
SHOULDER DIAMETER0.177 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
MATERIALPLASTIC POLYAMIDE NYLON OVERALL
HOLE DIAMETER0.130 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
13031608-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 1229N-375?
1229N-375 is a WASHER,SHOULDERED.
What parts can replace 1229N-375?
There is 1 known substitute for 1229N-375: 13031608-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 1229N-375?
1229N-375 is cataloged in the U.S. Government catalog under NSN 5310-01-151-2778. 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.