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049521 — PIN,SPRING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

049521: PIN,SPRING.

The PIN,SPRING is a the manufacturer industrial component. Key specifications include diameter: 0.078 INCHES NOMINAL IN, material: STEEL CASE, case_style: SQUARE, seal_width: 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN, overall_length: 0.673 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN, style_designator: SLOTTED. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-290-7649, 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
049521
NSN: 5315-00-290-7649
NIINs: 002907649, 002919937
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
diameter0.078 INCHES NOMINAL IN
materialSTEEL CASE
case_styleSQUARE
seal_width0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
overall_length0.673 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN
style_designatorSLOTTED
material_thickness0.018 INCHES NOMINAL IN
housing_bore_diameter1.249 INCHES MINIMUM AND 1.251 INCHES MAXIMUM IN
sealing_element_styleANGULAR
accommodated_shaft_diameter0.750 INCHES NOMINAL IN
material_document_and_classificationAMS 5506 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
accommodated_shaft_maximum_rated_speed1600 FEET PER MINUTE FT
NSN5315-00-290-7649
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 049521 · 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
•
STYLE DESIGNATOR: SLOTTED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5506 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
DIAMETER: 0.078 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.018 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 410 OVERALL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSLOTTED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5506 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
DIAMETER0.078 INCHES NOMINAL IN
OVERALL LENGTH0.673 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN
MATERIAL THICKNESS0.018 INCHES NOMINAL IN
MATERIALSTEEL COMP 410 OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
MS171469Reference document
Same NSN cross-reference
Reference document — Secondary reference
0495-21FSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 049521?
049521 is a PIN,SPRING.
What parts can replace 049521?
There are 2 known substitutes for 049521: MS171469, 0495-21F. Substitute compatibility should be verified for your specific system.
What is the NSN for 049521?
049521 is cataloged in the U.S. Government catalog under NSN 5315-00-290-7649. 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.