PartsTable
Technical Data Sheet
656-B34-1Y ✓ Verified by PartsTable
· NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.051 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN, hole_diameter: 0.344 INCHES NOMINAL IN, overall_diameter: 1.250 INCHES NOMINAL IN, special_features: LOW CARBON STEEL PER FED-STD-66, surface_treatment: ZINC OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-097-7691, 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
656-B34-1Y
NSN: 5310-01-097-7691
FSC: 5310
CAGE: 94223 — SPAENAUR INC (CAN)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.051 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
hole_diameter0.344 INCHES NOMINAL IN
overall_diameter1.250 INCHES NOMINAL IN
special_featuresLOW CARBON STEEL PER FED-STD-66
surface_treatmentZINC OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
surface_treatment_document_and_classificationQQ-Z-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-097-7691
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 656-B34-1Y · 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
OVERALL DIAMETER: 1.250 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLE: ROUND
SURFACE TREATMENT: ZINC OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-Z-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL: STEEL OVERALL
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER1.250 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
SPECIAL FEATURESLOW CARBON STEEL PER FED-STD-66
SURFACE TREATMENTZINC OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-Z-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.344 INCHES NOMINAL IN
THICKNESS0.051 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
768Interchangeable
interchangeable cross-reference
interchangeable
B94.19 TABLE 41Interchangeable
interchangeable cross-reference
interchangeable
C41615Interchangeable
interchangeable cross-reference
interchangeable
41615Interchangeable
interchangeable cross-reference
interchangeable
G-12Interchangeable
interchangeable cross-reference
interchangeable
15422Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 656-B34-1Y?
656-B34-1Y is a WASHER,FLAT.
What parts can replace 656-B34-1Y?
There are 25 known substitutes for 656-B34-1Y: 768, B94.19 TABLE 41, C41615 and 22 more. Substitute compatibility should be verified for your specific system.
Is 656-B34-1Y still available?
656-B34-1Y is currently cancelled.
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