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521056 — LINER,RELIEF VALVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

521056: LINER,RELIEF VALVE.

The LINER,RELIEF VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1095 OVERALL, overall_width: 0.1973 INCHES MINIMUM AND 0.1977 INCHES MAXIMUM IN, overall_height: 0.115 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN, overall_length: 0.610 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL, style_designator: PLAIN. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-328-7600, 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
521056
NSN: 5315-00-328-7600
NIINs: 003287600, 006323695
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 30715 — SABRELINER CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 1095 OVERALL
overall_width0.1973 INCHES MINIMUM AND 0.1977 INCHES MAXIMUM IN
overall_height0.115 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN
overall_length0.610 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
style_designatorPLAIN
surface_treatmentCADMIUM OVERALL
starting_edge_shapeSTRAIGHT
material_document_and_classificationAMS 5132 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationAMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5315-00-328-7600
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 521056 · 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: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
STARTING EDGE SHAPE: STRAIGHT
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5132 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.115 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
STARTING EDGE SHAPESTRAIGHT
STYLE DESIGNATORPLAIN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5132 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH0.610 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
OVERALL WIDTH0.1973 INCHES MINIMUM AND 0.1977 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL COMP 1095 OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 521056?
521056 is a LINER,RELIEF VALVE.
What is the NSN for 521056?
521056 is cataloged in the U.S. Government catalog under NSN 5315-00-328-7600. 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.