PartsTable
Technical Data Sheet
Download PDF

WC1057-4 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

WC1057-4: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, thickness: 0.027 INCHES MINIMUM AND 0.048 INCHES MAXIMUM IN, hole_diameter: 0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN, overall_diameter: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, surface_treatment: OXIDE FILM OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-409-1763, 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
WC1057-4
NSN: 5310-00-409-1763
NIINs: 004091763, 007827343
FSC: 5310 — Nuts and Washers
CAGE: 70318 — ALLMETAL SCREW PRODUCTS CORP (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
thickness0.027 INCHES MINIMUM AND 0.048 INCHES MAXIMUM IN
hole_diameter0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
overall_diameter0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
surface_treatmentOXIDE FILM OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
minimum_tensile_strength60000 POUNDS PER SQUARE INCH LBS
cross-sectional_shape_styleRECTANGULAR
nondefinitive_spec/std_dataA TYPE AND 1 GRADE AND B CLASS
material_document_and_classificationQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-409-1763
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: WC1057-4 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-13924 CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 0.307 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
NONDEFINITIVE SPEC/STD DATA: A TYPE AND 1 GRADE AND B CLASS
•
COLOR: BLACK OVERALL
•
SURFACE TREATMENT: OXIDE FILM OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924 CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER0.307 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
NONDEFINITIVE SPEC/STD DATAA TYPE AND 1 GRADE AND B CLASS
COLORBLACK OVERALL
SURFACE TREATMENTOXIDE FILM OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OVERALL
CENTER HOLE SHAPE STYLEROUND
SUBSTITUTES & CROSS-REFERENCES 9
A05738Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
FFW92Reference document
Same NSN cross-reference
Reference document — Identification reference
10121371Reference document
Same NSN cross-reference
Reference document — Informative reference only
5310004091763Reference document
Same NSN cross-reference
Reference document — Informative reference only
410950-6Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MS15795-805BReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
Ready to buy WC1057-4?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is WC1057-4?
WC1057-4 is a WASHER,FLAT.
What parts can replace WC1057-4?
There are 9 known substitutes for WC1057-4: A05738, FFW92, 10121371 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for WC1057-4?
WC1057-4 is cataloged in the U.S. Government catalog under NSN 5310-00-409-1763. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — WC1057-4

✓ 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.