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AX51907 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

AX51907: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OR STEEL COMP 430 OVERALL, thickness: 0.032 INCHES NOMINAL IN, hole_diameter: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, overall_diameter: 0.500 INCHES NOMINAL IN, surface_treatment: PASSIVATE OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-264-0700, 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
AX51907
NSN: 5310-00-264-0700
FSC: 5310 — Nuts and Washers
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
materialSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OR STEEL COMP 430 OVERALL
thickness0.032 INCHES NOMINAL IN
hole_diameter0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
overall_diameter0.500 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
nondefinitive_spec/std_dataA TYPE AND 2 GRADE AND B CLASS
material_document_and_classificationQQ-S-766,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5310-00-264-0700
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AX51907 · 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: 0.500 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
NONDEFINITIVE SPEC/STD DATA: A TYPE AND 2 GRADE AND B CLASS
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OR STEEL COMP 430 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.500 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
NONDEFINITIVE SPEC/STD DATAA TYPE AND 2 GRADE AND B CLASS
SURFACE TREATMENTPASSIVATE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OR STEEL COMP 430 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
THICKNESS0.032 INCHES NOMINAL 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
FFW92TYPEAGRADE2CLASSBReference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AX51907?
AX51907 is a WASHER,FLAT.
What parts can replace AX51907?
There is 1 known substitute for AX51907: FFW92TYPEAGRADE2CLASSB. Substitute compatibility should be verified for your specific system.
What is the NSN for AX51907?
AX51907 is cataloged in the U.S. Government catalog under NSN 5310-00-264-0700. 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.