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91638538 — PIN,SPRING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91638538: PIN,SPRING.

The PIN,SPRING is a the manufacturer industrial component. Key specifications include diameter: 0.258 INCHES MINIMUM AND 0.264 INCHES MAXIMUM IN, material: STEEL OVERALL, overall_length: 0.500 INCHES NOMINAL IN, hardness_rating: 48.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL, style_designator: SLOTTED, material_thickness: 0.048 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-179-2182, 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
91638538
NSN: 5315-01-179-2182
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: F6481 — THALES SA (FRA)
SPECIFICATIONS
diameter0.258 INCHES MINIMUM AND 0.264 INCHES MAXIMUM IN
materialSTEEL OVERALL
overall_length0.500 INCHES NOMINAL IN
hardness_rating48.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
style_designatorSLOTTED
material_thickness0.048 INCHES NOMINAL IN
NSN5315-01-179-2182
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91638538 · 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
•
HARDNESS RATING: 48.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
•
STYLE DESIGNATOR: SLOTTED
•
DIAMETER: 0.258 INCHES MINIMUM AND 0.264 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.048 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
HARDNESS RATING48.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
STYLE DESIGNATORSLOTTED
DIAMETER0.258 INCHES MINIMUM AND 0.264 INCHES MAXIMUM IN
OVERALL LENGTH0.500 INCHES NOMINAL IN
MATERIAL THICKNESS0.048 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91638538?
91638538 is a PIN,SPRING.
What is the NSN for 91638538?
91638538 is cataloged in the U.S. Government catalog under NSN 5315-01-179-2182. 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.