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91S3-1 — WASHER,SPECIAL

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91S3-1: WASHER,SPECIAL.

The WASHER,SPECIAL is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OVERALL, hole_diameter: 0.424 INCHES MINIMUM AND 0.436 INCHES MAXIMUM IN, outside_diameter: 0.672 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN, special_features: 1.500 IN. COILS IN, style_designator: SPLIT HELICAL-RIGHT HAND, material_thickness: 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN.

This part is cataloged in the U.S. Government catalog under NSN 5310-00-480-0072, 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
91S3-1
NSN: 5310-00-480-0072
NIINs: 004800072, 007262212, 009973098
FSC: 5310 — Nuts and Washers
CAGE: D0680 — FAIRCHILD FASTENERS EUROPE - CAMLOC GMBH (DEU)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
hole_diameter0.424 INCHES MINIMUM AND 0.436 INCHES MAXIMUM IN
outside_diameter0.672 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN
special_features1.500 IN. COILS IN
style_designatorSPLIT HELICAL-RIGHT HAND
material_thickness0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-480-0072
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91S3-1 · 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: SPLIT HELICAL-RIGHT HAND
•
OUTSIDE DIAMETER: 0.680 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.025 INCHES NOMINAL IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
HOLE DIAMETER: 0.430 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
OUTSIDE DIAMETER0.680 INCHES NOMINAL IN
MATERIAL THICKNESS0.025 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING OVERALL
HOLE DIAMETER0.430 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 4
WEA124030Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
91297218Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
PDA31826Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
X01368Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 91S3-1?
91S3-1 is a WASHER,SPECIAL.
What parts can replace 91S3-1?
There are 4 known substitutes for 91S3-1: WEA124030, 91297218, PDA31826 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 91S3-1?
91S3-1 is cataloged in the U.S. Government catalog under NSN 5310-00-480-0072. 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.