PartsTable
Technical Data Sheet
Download PDF

7744771 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

7744771: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.319 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN, hardness_rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM, outside_diameter: 0.575 INCHES NOMINAL IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: CADMIUM OR ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-012-0379, 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
7744771
NSN: 5310-00-012-0379
FSC: 5310 — Nuts and Washers
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.319 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
outside_diameter0.575 INCHES NOMINAL IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentCADMIUM OR ZINC OVERALL
material_thickness0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
nondefinitive_spec/std_data1 STYLE AND A CLASS
material_document_and_classificationFED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 FED STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-416 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL
NSN5310-00-012-0379
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7744771 · 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: QQ-P-416 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 FED STD ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 0.575 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
•
NONDEFINITIVE SPEC/STD DATA: 1 STYLE AND A CLASS
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 FED STD ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER0.575 INCHES NOMINAL IN
MATERIAL THICKNESS0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATA1 STYLE AND A CLASS
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.319 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 8
56436Reference document
Same NSN cross-reference
Reference document — Secondary reference
10-20395Reference document
Same NSN cross-reference
Reference document — Secondary reference
5310000120379Reference document
Same NSN cross-reference
Reference document — Informative reference only
FIG2213-5-16Reference document
Same NSN cross-reference
Reference document — Secondary reference
FFW84CLASSASTYLE1Reference document
Same NSN cross-reference
Reference document — Identification reference
120379Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
Ready to buy 7744771?
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 7744771?
7744771 is a WASHER,LOCK.
What parts can replace 7744771?
There are 8 known substitutes for 7744771: 56436, 10-20395, 5310000120379 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7744771?
7744771 is cataloged in the U.S. Government catalog under NSN 5310-00-012-0379. 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 — 7744771

✓ 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.