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2531528 — PIN,STRAIGHT,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2531528: PIN,STRAIGHT,HEADLESS.

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, first_end_style: CHAMFERED, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL, surface_treatment: PHOSPHATE OVERALL, pin_overall_length: 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN, pin_overall_diameter: 0.3105 INCHES MINIMUM AND 0.3110 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-595-1291, 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
2531528
NSN: 5315-01-595-1291
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
first_end_styleCHAMFERED
hardness_rating40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
surface_treatmentPHOSPHATE OVERALL
pin_overall_length1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
pin_overall_diameter0.3105 INCHES MINIMUM AND 0.3110 INCHES MAXIMUM IN
first_end_taper_angle0.040 DEGREES MINIMUM AND 0.050 DEGREES MAXIMUM
first_end_taper_length0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
second_end_taper_angle0.040 DEGREES MINIMUM AND 0.050 DEGREES MAXIMUM
end_item_identification1020013557404, LOADER, RAMMER POWERED
second_end_taper_length0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-624,4140 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5315-01-595-1291
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2531528 · 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
•
FIRST END TAPER LENGTH: 0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-P-16232 TYPE M, CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SECOND END TAPER ANGLE: 0.040 DEGREES MINIMUM AND 0.050 DEGREES MAXIMUM
•
FIRST END STYLE: CHAMFERED
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-624,4140 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SECOND END TAPER LENGTH: 0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
•
FIRST END TAPER ANGLE: 0.040 DEGREES MINIMUM AND 0.050 DEGREES MAXIMUM
TECHNICAL CHARACTERISTICS
FIRST END TAPER LENGTH0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-P-16232 TYPE M, CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SECOND END TAPER ANGLE0.040 DEGREES MINIMUM AND 0.050 DEGREES MAXIMUM
FIRST END STYLECHAMFERED
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624,4140 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SECOND END TAPER LENGTH0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
FIRST END TAPER ANGLE0.040 DEGREES MINIMUM AND 0.050 DEGREES MAXIMUM
PIN OVERALL DIAMETER0.3105 INCHES MINIMUM AND 0.3110 INCHES MAXIMUM IN
PIN OVERALL LENGTH1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2531528?
2531528 is a PIN,STRAIGHT,HEADLESS.
What is the NSN for 2531528?
2531528 is cataloged in the U.S. Government catalog under NSN 5315-01-595-1291. 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.